ThingSpeak

Hi everyone I've been using ThingSpeak for several years now without an issue until last Thursday. I have four ThingSpeak channels which are used by three Arduino devices (in two locations/on two distinct networks) all running the same code. All three devices stopped being able to write data to my ThingSpeak channels around 17:00 CET on 4 Dec and are still unable to. Nothing changed on this side, let alone something that would explain the problem. I would note that data can still be written to all the channels via a browser so there is no fundamental problem with the channels (such as being full). Since the above date and time, any HTTP/1.1 'update' (write) requests via the REST API (using both simple one-write GET requests or bulk JSON POST requests) are timing out after 5 seconds and no data is being written. The 5 second timeout is my Arduino code's default, but even increasing it to 30 seconds makes no difference. Before all this, responses from ThingSpeak were sub-second. I have recompiled the Arduino code using the latest libraries and that didn't help. I have tested the same code again another random api (api.ipify.org) and that works just fine. Curl works just fine too, also usng HTTP/1.1 So the issue appears to be something particular to the combination of my Arduino code *and* the ThingSpeak environment, where something changed on the ThingSpeak end at the above date and time. If anyone in the community has any suggestions as to what might be going on, I would greatly appreciate the help. Peter Did something change on ThingSpeak server on 4 Dec 2025? Mine works great with no interruption. Do you have code to share? Thanks for your interest and comment Shore. I'll get working on a (very) stripped-down sketch that reproduces the issue although, for the reasons I've stated, I believe the issue lies on the ThingSpeak side. That said, perhaps there's something I can do on my side to compensate for whatever's (surely) changed there. I'll post the stripped-down code tomorrow. Meanwhile, a question for you. When you say "mine works great", what is the "mine" that you're referring to? Something Arduino-related? Both of my Arduinos stopped uploading data at the same time (Dec. 4). The last entry is 2025-12-04T15:36:58Z. They had been running for around 8 years on the same code, so something changed on ThingSpeak. I doubt I still have a copy of the code. @J.D., @Peter: Can you please share the HOST header being set by your devices? Also, can you share the hostname the request is being made to, if it isn't api.thingspeak.com. Here are some public channels that seem to be working: 1) https://thingspeak.mathworks.com/channels/9 2) https://thingspeak.mathworks.com/channels/1293177 3) https://thingspeak.mathworks.com/channels/2057381 Thanks for your interest and comment Vinod. The public channels are interesting (thank you), particularly https://thingspeak.mathworks.com/channels/1293177 which, from the notes there, appears to be running on ESP8266 (same as me) although I'm using NodeMCU 1.0 (ESP-12E) versus their (claimed) UNO R3. And yes, still working, as you say. For GET (single write), my sketch uses no explicit HTTP headers (unless they are added by the ESP8266HTTPClient library it's using, which I haven't checked). Prompted by your question, I tried adding the following headers to GET but it still didn't work: client.println(F("GET /update HTTP/1.1")); client.print(F("Host: ")); client.println(thingspeakServer);//api.thingspeak.com client.println(F("Connection: close")); For POST/JSON, my sketch uses headers as shown by this code: client.println(F("/bulk_update.json HTTP/1.1")); client.print(F("Host: ")); client.println(thingspeakServer);//api.thingspeak.com client.println(F("User-Agent: mw.doc.bulk-update (Arduino ESP8266)")); client.println(F("Connection: close")); client.println(F("Content-Type: application/json")); client.print(F("Content-Length: ")); I think that's answered all your great questions. Does it help to make sense of what's going on? I note that J.D. has added a comment to my post saying that his Arduinos experienced the same issue at the same date/time. Something's going on here! Cheers, Peter @Peter: Can you please share a complete sketch that reproduces the issue? Also if you can share if this is an esp8266 connected by WiFi or some sort of LTE modem or such that would be helpful. I will work on a cut-down sketch to post here. All three Arduinos (ESP8266) connect via WiFi - actually two WiFi networks in two countries as two devices are at the same location in one country and the other is in a second location/country. Hi again Vinod I've just spotted that my original code has started working again so it looks as it ThingSpeak have fixed whatever was up at their end. Still, it's strange that some ways of "writing" messages stopped working while others were just fine. I'm sure there will be a fascinating (yawn!) explanation for that but I haven't the time (or, frankly, the inclination) to find out what that is. Thank you for your kind assistance. Mine also started working again today at about 15:00 GMT. I'm glad it is apparently sorted. All my channels stopped working at the same time about (16:50) 10 hrs ago today. Whats going on here? @Brian By any chance, are you setting a HOST header that is not api.thingspeak.com, or, sending the update request to ThingSpeak through some sort of proxy that is setting a header that is not api.thingspeak.com? EDIT: Looking at the logs, it appears that whatever process is updating your channels is making a request to api.thingspeak.com, with a HOST header incorrectly set to "a.c.d". This request is now being rejected. @Vinod Where are the logs that you're referring to? I'm not aware that ThingSpeak maintains logs on their side that are visible to the user. Or perhaps you mean something else. @Brian My channels are still working just fine, having recovered from the mysterious issue about 18 hours ago (at the time of posting). The pattern that's emerging here suggests that, not unusually, ThingSpeak has multiple servers (perhaps distributed geographically) handling inbound traffic where only some of them have been updated with troublesome code. Given that whichever server(s) my Arduinos hit(s) is/are now working again, one can hope that the one(s) you depend on will also recover. @Peter: These are internal application logs not accessible to end users. OK! From your comment, I've only just figured out that you work at/for Mathworks! This is what my code uses... const char* server = "api.thingspeak.com"; Nothing changed on my side they all just stopped updating all at the same time and havent recovered yet Channel Stats Created: 7 years ago Last entry: about 22 hours ago Entries: 939189 "your channels is making a request to api.thingspeak.com, with a HOST header incorrectly set to "a.c.d". This request is now being rejected." What does this mean? how do I resolve this? Thanks, Brian @Brian Please share a sketch that reproduces the issue. There was a config change deployed yesterday to block requests that come in to api.thingspeak.com with an invalid HOST header. If you can share your Arduino sketch or program that updates your channels, I can potentially make suggestions. // Send data to ThingSpeak WiFiClient client; if (client.connect(server,80)) { Serial.println("Connect to ThingSpeak - OK"); String postStr = ""; postStr+="GET /update?api_key="; postStr+=api_key; postStr+="&field1="; postStr+=String(pressure); postStr+="&field2="; postStr+=String(temperature * 1.8 + 32); postStr+="&field3="; postStr+=String(humidity); postStr+="&field4="; postStr+=String(rssi); postStr+="&field5="; postStr+=String(volt); postStr+="&field6="; postStr+=String(busvoltage + (shuntvoltage / 1000)); postStr+="&field7="; postStr+=String(mean); postStr+="&field8="; postStr+=String(power_mW); postStr+=" HTTP/1.1\r\nHost: a.c.d\r\nConnection: close\r\n\r\n"; postStr+=""; client.print(postStr); //******************************************************************************* This line needs to change: postStr+=" HTTP/1.1\r\nHost: a.c.d\r\nConnection: close\r\n\r\n"; The host you are making the request to is "api.thingspeak.com", so this should be: postStr+=" HTTP/1.1\r\nHost: api.thingspeak.com\r\nConnection: close\r\n\r\n"; My channel has stopped receiving data since 8th of December. Its been working 2 years now without issues. I send http to api.thingspeak.com Hi all, My channels have stopped working 3 days now. I do POST,"http://api.thingspeak.com:80/update?api_key=...... " using GSM modem. There is a good network coverage and I see traffic on my sim cards. It looks to me like an issue on thingspeak server. Can someone suggest ? Regards Have you read this thread or just posted on it without making the effort to read it? If you've read it, it would be helpful if your posted commented on what you've read and whether that helped - or specifically didn't - in any way. If you read (or re-read) it, I believe you will find a strong pointer to the cause of your issue. Clue: it sounds the same as Brian's. Hi Peter, It seems to me that you suggest to wait for an update of the geographically distributed thingspeak servers and the problem will be solved. Also as I said, I send a request to api.thingspeak.com and not some kind of proxy. Regards, Please share your sketch. I am specifically interested in what the "HOST: " header is set to. See my recommendation in this message. Please share your sketch. I am specifically interested in what the "HOST: " header is set to. See my recommendation in this message. Vinod, Thanks for your support. I haven't made your suggested changes to my channels yet but on 12/11/25 at 15:55 EST they all started to work again. Now I am not sure if I still need to make your suggested changes Thanks, Brian @Brian: You do need to make the changes in your sketch. What is being sent today is only being accepted temporarily to provide time for folks to fix their code. We do intend to block these incorrect headers again in the future. AT^HTTPCMD=1,POST,"http://api.thingspeak.com:80/update?api_key=xxxxxxxxxxxxx&field1=48.130&field2=99&field3=99&field4=100&field5=99&field6=99",0,"text/plain" OK, Thanks for the heads up!!! Hi Brian, Is this code correct? AT^HTTPCMD=1,POST,"http://api.thingspeak.com:80/update?api_key=xxxxxxxxxxxxx&field1=48.130&field2=99&field3=99&field4=100&field5=99&field6=99",0,"text/plain" Regards Hi @Vinod. Is there a formal statement about these changes so that ThinkSpeak users can understand the detail and scope of them? At the most basic level, for example, I wonder what is meant by an invalid HOST header. From @Brian's experience, it would appear that a "wrong" one will be consider invalid (reasonably enough) but what about no HOST header? Rather than focusing on that particular point, I do think a statement is required here. If it has already been published, where can it be found please? I'm not sure of this is possible, but it would be ideal if these types of code changes (aka a change that potentially denies service) could be announced in advance. :) Or maybe I don't know where I should have been watching? Again, dunno if possible, but I've got 8 bricked IOT projects in my house, some of them very remote and hard to get to (attics etc) that I'll have to retrieve physically, and of course spent a day chasing my tail when it broke initially, and then it magically came back to life randomly a day or so ago. Dunno where the original "a.c.d" code snippet came from, but it's been working OK for years, and I'm not the only one using it evidently. :) That is fair feedback. We'll try and pre-announce the changes in the future. The reason we put in a workaround for now is based on user feedback, and, to allow time for users to update their code. @kolias, @karabalhs: It appears your devices are attempting to send data through a DNS CNAME, iot.zygi.gr, that is not authorized or controlled by MathWorks. When the data comes through this, the HOST header is set to iot.zygi.gr. ThingSpeak API cannot accept data coming through this as it presents a risk to users of man-in-the-middle attacks. Your devices need to be updated to be sending data directly to api.thingspeak.com. PS: Please consider purchasing a standard license of ThingSpeak if zygi.gr is using ThingSpeak for commercial purposes. See this message. See this message. Hi Vivod and thanks for your time. This account (sade@zygi.gr) is sending directly to api.thingspeak.com but it also can't send data. Do you think that if I remove the dns record iot.zygi.gr will solve the problem for the (sade) account ? Also, why you think the paid licence will solve my issue? Regards Can you share more about how your devices are sending data to ThingSpeak? Can you please share the public IP address of the device? Is it an 8266 or Arduino? Is it going through the same service as the other zygi.gr devices? As for using a paid license, if you are using ThingSpeak for commercial purposes, to be in compliance with terms of service, you should purchase a license. Hi Vinod, I use arm microcontroller with huaweii gsm modules (mu709s-2) and sim cards from thingsmobile.com All zygi.gr devices use the same setup. All IP addresses are dynamic and I don't know them. Also, I have removed the cname dns record of iot.zygi.gr -> api.thingspeak.com from my dns server 4 hours ago. Regards, Once the DNS CNAME is removed, you may need to restart any routers and devices to clear caches. If you can get me an IP of one device I can try and lookup in a few hours what we see on the incoming requests. Hi Vinod, I will wait one more day for the caches of routers and firewalls to be cleared to see if the problem solved. As for IP addresses, unfortunately I have no access in such info at the moment. Latest info soon in this post. Thanks a lot, Regards Please share the full sequence of AT commands your microcontroller is sending the SIM card. I looked up the spec sheet and my understanding is that the AT command needs to be like this: AT^HTTPCMD=1,POST,"https://api.thingspeak.com:443/update?api_key=xxxxxxxxxxxxx&field1=48.130&field2=99&field3=99&field4=100&field5=99&field6=99" If you're using plain HTTP, it would be something like this: AT^HTTPCMD=1,POST,"http://api.thingspeak.com:80/update?api_key=xxxxxxxxxxxxx&field1=48.130&field2=99&field3=99&field4=100&field5=99&field6=99" Keep in mind the entire string cannot be more than 255 characters, per the spec sheet. I think the sequence of AT commands using this modem should be something like: AT^IPCFL=14,1 AT^HTTPCMD=1,POST,"http://api.thingspeak.com:80/update?api_key=xxxxxxxxxxxxx&field1=48.130&field2=99&field3=99&field4=100&field5=99&field6=99" AT^IPSENDEX=1,2,<REPLACE_WITH_NUMBER_OF_BYTES_IN_STRING_ABOVE> Again, it would be required to get the full sequence of AT commands your device is using to be able to help you. Hi Vinod, Devices were all working normally since the 8th of December. The AT commands I'm using for "http post" together with some "wait for OK" code are as follows: AT^IPINIT="TM"//the APN of thingsmobile AT^IPOPEN=1,"HTTP",api.thingspeak.com",80 //linkID=1 AT^HTTPCMD=1,POST,"http://api.thingspeak.com:80/update?api_key=xxxxxxxxxxx&field1=48.130&field2=99&field3=99&field4=100&field5=99&field6=99",0,"text/plain" AT^IPCLOSE=1 //close link Regards, What I'm not sure about is the "0" before "text/plain". Reading the spec that is the number of bytes being sent. Dear Vinod, Its the 5th day and even with the dns cname removal (iot.zygi.gr->api.thingspeak.com) nothing has changed. Regarding the "0" before "text/plain", this code is currently working now in other channels. e.g:channel 3010051, 3003928, 3062104, 2611601. I'm waiting for a reply from the sim card provider (thingsmobile.com) about the IP address of the channels that don't work and I will inform you to do some trace to find the problem. Regards,

Hello, I have Arduino DIY Geiger Counter, that uploads data to my channel here in ThingSpeak (3171809), using ESP8266 WiFi board. It sends CPM values (counts per minute), Dose, VCC and Max CPM for 24h. They are assignet to Field from 1 to 4 respectively. How can I duplicate Field 1, so I could create different time chart for the same measured unit? Or should I duplicate Field 1 chart, and how? I tried to find the answer here in the blog, but I couldn't. I have to say that I'm not an engineer or coder, just can simply load some Arduino sketches and few more things, so I'll be very thankfull if someone could explain like for non-IT users. Regards, Emo How to duplicate field chart? Can you cliarify what you mean my "Duplicate Field 1"? Do you mean the settings on the field plot, like number of points and axis scale and so forth? If I understand your question correctly, I think the easiest way to do what you want is to use a custom visualization. Then you can copy the code for another custom visualization, but change the field you read data from. psuedo code: %Read data from channel field x myData=thingSpeakRead(...); %plot data plot(myData.timestamps,myData.xvals...); %adjust settings ylabel("dose"); You can use the MATLAB AI chat playground to help you generate the code for the custom visualization. I can also give you more description here if that is what you are interested in. You might also just be asking how to add a field plot. That you can do in the "add visualizations" button on the channel view page. Thanks for putting up the radiation levels. I built scintillation based dosimeters in a previous engagement, so I think it would be cool to have rad monitors on ThingSpeak from all over the world, kind of like all the weather stations. Yeah, you said it better - just wanted to add a field plot that uses the same field 1 data (red rectangle on the picture above). Currently, the plot set to use that field is showing readings for an one hour back. I want to make another plot, that uses the same field 1, but this time will set it to show reading for a week, or month etc. I hope I managed to explain it understandable. If not, sorry, I'm a physician, not a coder (if that's an excuse at all hahah). Yeah, lets make a custom visualization. Instructions are here. in general, click the green button that says MATLAB visualizations and click "create a 2d line plot". Then fill in the data and muck with the thingspeakread line to get the data you want [data, time] = thingSpeakRead(readChannelID, 'Field', fieldID1, 'NumPoints', 30, 'ReadKey', readAPIKey); In that line, you can change numpoints to numdays or numminutes to get the data range you want. You can then perform infinite customization on the plot. You can look in the documentation or use the AI chat playground i liked above to use natural language to describe what you want. Like "Give me a thicker line plot with red axis labels and a title of 'radiation plot' ". They the AI will show you the code you can copy into your visualization to get the plot you want (blue marker points, black background, inset close up etc.). When you are done, save and run, then it should show on your channel view. You can add multiple visualizations. They wont have the live update features of the thingspeak plots but you get way more options. If you definitely need the thingspeak plot, you can write code to copy the data to multiple fields in another channel and configure each field view how you like it. Lemme know if you need help with that. Many thanks for your answer! I'll try to figure out what's needed and how to work with the info you provided. AI is a good suggestion, since the coding needed here isn't sounds like rocket science. Yeah, it's still beyond my knowledge, but it looks very doable with some ai help. Will definitely give you a feedback. Maaan, that's AWESOME! Many, many thanks for suggesting the AI playground option! :) I managed to make some really nice plot that shows two types of data - raw readings and average values. In the next couple of days I'll make a month (or three) readings plot, as well as a mean daily dose plot for... some period :D Here is the plot: https://thingspeak.mathworks.com/apps/matlab_visualizations/647377?height=auto&width=auto Here is the channel: https://thingspeak.mathworks.com/channels/3171809 Again - many thanks for your help, appreciate it! :) P.S.: I can even see it on my phone with ThingShow app. Great! :) Nice work! Thanks for sharing the final result too. Now you can use a time control to email weekly dose reports, or react app to raise the radiation shield when the dose goes over a limit... Didn't know I could set weekly reports, nice! Have to do some research on that option with React app. Is it part of MATHLab or it's separate app? Thanks! Hi, And thanks for suggesting these cool options! I generated an Alert ApiKey and set TimeControl preset for weekly dose reports using this MATLAB code (with the help of AI Chat Playground of course): % Channel IDs and API keys radiationChannelID = 3171809; % Your radiation channel ID alertApiKey = 'TAKPxxxxxxxxxxxxxxxx'; % Your alerts API key % Set the URL for the HTTP call alertUrl = "https://api.thingspeak.com/alerts/send"; % Set web options for the HTTP request options = weboptions("HeaderFields", ["ThingSpeak-Alerts-API-Key", alertApiKey]); % Read the radiation data for the past week from Field 2 radiationData = thingSpeakRead(radiationChannelID, 'NumDays', 7, 'Fields', 2); % Check if the radiation level is high isHighRadiation = any(radiationData > 0.4); % Check if any value exceeds 0.4 µSv/h % Prepare the alert body based on the radiation level if isHighRadiation alertBody = 'Warning: High radiation levels detected in the past week.'; else alertBody = 'Radiation levels are normal in the past week.'; end % Prepare the alert subject alertSubject = 'Radiation Dose Alert'; % Send the alert try webwrite(alertUrl, "body", alertBody, "subject", alertSubject, options); catch someException fprintf("Failed to send alert: %s\n", someException.message); end So, my question is, can I use the same code when creating a React to raise the radiation shield, because I coudn't find what MATLAB analysis code should be used there? If I was instrumenting this secret radiation lab, I would have the radiation shield controlled by a device that is reading a Thingspeak channel to know what its state should be. Thus in my case, the code in the react app would be different and it would be code that uses thingSpeakWrite to write to the control channel to open the shield. In your case, the code you use depends on how you are instrumenting the radiation shield. By the way, you can alse use timecontrol to do more custom tests that what are allowed by react. React App is just a simplified set of criteria that ThingSepak runs for you to decide to run code that you choose. You can also put the decision criteria into the code called by timecontrol. field chart duplicate

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I am currently using the ThingSpeak API to upload bat detection data from my project. I am trying to set the created_at timestamp to match the date and time captured from the image filenames. However, despite sending the created_at field in ISO 8601 format (YYYY-MM-DDTHH:MM:SSZ) via JSON in a POST request, ThingSpeak still records the current upload time instead of the provided timestamp. Could you please clarify the correct way to send a custom timestamp so that ThingSpeak uses it instead of the current server time? Any guidance or examples would be greatly appreciated.

как я получил api Token как я получил api Token Do you mean user API token (to change account settings and add channels) or channel API tokens? The channel API tokens are used to read and write data in your channels.

Hey everyone, I’m currently working with MATLAB R2025b and using the MQTT blocks from the Industrial Communication Toolbox inside Simulink. I’ve run into an issue that’s driving me a bit crazy, and I’m not sure if it’s a bug or if I’m missing something obvious. Here’s what’s happening: I open the MQTT Configure block. I fill out all the required fields — Broker address, Port, Client ID, Username, and Password. When I click Test Connection, it says “Connection established successfully.” So far so good. Then I click Apply, close the dialog, set the topic name, and try to run the simulation. At this point, I get the following error:Caused by: Invalid value for 'ClientID', 'Username' or 'Password'. When I reopen the MQTT config block, I notice that the Password field is empty again — even though I definitely entered it before and the connection test worked earlier. It seems like Simulink is somehow not saving the password after hitting Apply, which leads to the authentication error during simulation. Has anyone else faced this? Is this a bug in R2025b, or do I need to configure something differently to make the password persist? Would really appreciate any insights, workarounds, or confirmations from anyone who has used MQTT in Simulink recently. Thanks in advance! Possible bug in MQTT Block (Simulink, MATLAB R2025b) – Password disappears after Apply We are aware of this issue and can confirm it is a bug. We are working on a fix, and should have it available in an upcoming update release. You can watch MATLAB Answers or bug reports to see when the fix is released. Thank you for reporting this issue. We acknowledge this as a bug and are actively working on a fix. You can monitor the progress through the Bug Report linked here. In the meantime, please try the workaround provided in the report. simulink mqtt r2025b

Is there a problem with Matlab Visualisations? My thingspeak matlab visualsations seem to be frozen and wont update when refreshed. If I manually go into the code and press save and run the updated data appears but not on my main public view page.

Hello everyone, I have a problem sending my email. It tells me I have a payment problem, but I already paid for the student license and I haven't used the 800 email limit. What can I do in this case?

Hi, I have some problem, I want to upload my data that sample rate at 500HZ, every sevral seconds. My data include 12 bytes, and it measure 500HZ, for example for 15 seconds I coolect 15*500*12 = 84KB. Can I upload this data to ThingSpeak? It is possible to use with Free acount (I am student and this is my project) How can help me.. Sampling rate and uploading, It may be possible to upload this data to Thingspeak, even with the free account, but Im not sure its the right workflow. ThingSpeak is generally not optimized for high data rate applications. The data is live and sharable, but the database can be eventually cosistant, not immedeiately in some cases, especially with high data rate. The bulk update endpoing allows up to 960 messages per post approximentally every 15-20 seconds. Each field has 256 characters, for 8 fields and locations and status, you can get about 4kB in a single post. For 960 messages, you can do about 192 kB per second, so your data rate may be possible, depending on your network and device. However, as I said above, this may be difficulat to achieve. I would reccomend you do some proocessing on the edge device and reduce the data in your stream.

Sending temperature and humidity values to a thingSpeak channel using a NodeMCU(esp8266) and the ThingSpeak library. The problem is that the graphs do not update dynamically even if values are sent and received regularly. To update the graphs I have to refresh the page every time. The numeric displays and other widgets update regularly. How can I solve the problem? Graphs do not update dynamically I just did a quick scan this morning, the public view of the channel seems to udate with data for the field charts.Im not sure about the private view, it does seem to be lagging. I was able to observe this effect in an old channel I have, but not with a new channel. The recent bug that makes it impossible to change the chart settings may be at play here. If you chart was set to a slower refresh time, or had included longer averaging, the data might not refesh as you expect. When I created a brand new channel, I did not observe the same effect. So there are several temporary workarounds. I'm not sure if creating new field charts in your old channel will work, but certainly creating a completely new channel worked for me. If you do try creating new field charts in your channel, can you let us know how it goes here? The bug that is causing the effect will be removed in an upcomming release, so the need for a workaround is temporary. Thank you for your answer. At this moment the problem only affects private view. I deleted and then recreated the two graphs in private view, now it seems to work in private view too I have the same issues as the others. A channel last updated 2021-06-20 03:20 still works correctly ie charts and widgets. Another channel updated today 2024-01-22 03:14 has the issues with charts and widgets described by others. Two questions. If I delete the channel and then recreate it will I my Write and Read API Keys change? When will the update be released? From the post below, it seems you can simply delete the field plots and reinstate them to fix the problem. (I didnt try that yet) If you delete the channel, the API keys will definitely change. If I delete the charts and widgets and then recreate them it does not display as the original display. I am using MacOS 12.7.2 on a Mac Mini 2018 3 GHz 6-Core Intel Core i5 The browser is Chrome Version 120.0.6099.234 (Official Build) (x86_64) Charts do not update dynamically. Gauge widget now works correctly! The data is being uploaded each 30 sec from 2 x MKR 1010 WIFI with very similar software but different R/W API keys Attached are 3 images 1 and 2 A channel last edited/updated 2021-06-20 03:20 still receiving data uploads and displaying correctly. 2 the same channel showing the widgets correctly. 3 Another channel edited today after deleting all charts and widgets and recreating 5 of them. Previously the charts and widgets were similar to 1 and 2 (I have not edited the colours) No numeric display with the Gauge. (It displays correctly! but not in this screen shot) Yes,this make it work. Thanks. I did some try,and I find that ,if you want dynamically data view in the chart,you should set the "timescale" to "blank"(select the white space bar) and "dynamic" to "true".Otherwise ,it will not refresh the chart data. as this pic red frame indicated : You do not need to collect data for sufficient time before you set those parameters. Setting those parameters to non-null values may result in the plots only showing up once sufficient data is collected.

Hi, I am sending data from my device to the thingspeak server using HTTP and I'm trying to attach a timestamp with my uploads. I am using the created_at field in the request to set the time zone. A sample request looks like this http://api.thingspeak.com/update?api_key=xxxyyyzzz&field1=3407.866699&field2=0.000000&field3=0.000000&field4=0.000000&field5=0.000000&field6=0.000000&field7=0.000000&field8=0.000000&created_at=2021-02-17T15:34:00+05:30 I live in India and my timezone offset is 5 hours 30 min. When I specify it like as shown above, I can see in the private view of my channel that it is adding 5 hours 30 min to the given time zone. So this time stamp becomes 21:04. How do I fix this? Am I making some mistake in my time zone offset in created_at? Or is there some time zone setting that is not set properly in my channel? Thanks, Ashwin N Setting Time zone using "created_at" field Your channel uses your profile settings to change the UTC timestamps saved in ThingSpeak into your local settings. If you want the data to show up in your local time, you can write UTC timestamps without the +5:30 and your channel will show them properly. Is this the effect you are trying to achieve? I did the same. But not changing in the data displayed in my private channel. Please help Can you describe specifically your problem? I think we resolved the OPs problem by removing the offset. Does that work for you? I have same problem.Change the profile timezone have nothing to do with it .

Is there a hardware support package available for the MP series? Hardware Support Package for the MP Series

I'm facing an issue where my Thinkspeak graph is not displaying, even though I'm using exactly the same code as my friend. The code works perfectly in their Thinkspeak account, but not on mine. I've checked the API keys, channel settings, and data formats, but everything seems similar. Has anyone else faced this problem, or do you have tips on what to check next? Suggestions are welcome! Thinkspeak Graph Not Displaying While Same Code Works for Friend I would focus on the data formats. Perhaps try to read thier data instead of yours and then operate on it. Often times, spaces or weird characters in just one entry can muck up a whole read when MATLAB tries to figure out if something is a string or a number for example. The ThingSpeak platform is deterministic though, if everything is truly exactly the same, the output will be the same. Feel free to share some examples here, we can look at your stuff and see if we spot the issue. thinkspeak troubleshooting iot

Hi! I'm having trouble sending data to a channel using MQTT. I'm using a program that was working perfectly until just a few days ago, but after making some minor changes yesterday, it stopped working. I’ve also tested it manually using the MQTTX client. If I send data using CURL and GET, it works fine. It’s a bit strange... Thankfully, Ernesto. Is the MQTT server experiencing any problems? same here, publish via mqtt stopped working 11 hours ago.. thanks Also having issues. Have different location and devices. All stopped working basically about 24 hours ago. It is only those that publish on the mqtt server. The one that is on restful is working. Thanks Jacques Can you please try again. A subset of MQTT devices seems to have seen an issue publishing. We've restarted nodes in the system and can confirm things are back to 100% from our dashboards. Now is working for me Working again. Thank you. Can you explain how this problem occurred? Unplanned updates on the server instances fronting ThingSpeak's MQTT API caused some nodes in ThingSpeak's high-availability MQTT cluster to get into a bad state. These changes were unrelated to ThingSpeak application code, as evidenced by the REST API working faultlessly in @Ernesto's post. We worked with the platform provider to address the issue and have confirmed things are working correctly again for all clients of the MQTT API. This issue has occurred again and has lasted for 30 minutes. not for me, all ok after they restarted nodes yea thx The additional monitoring we put in place didn't see any issues on any nodes. Did you see any effects on multiple devices? If so, can you please send me an email with the channel numbers? mqtt

Hello, I am new to ThinkSpeak so thought I would try your example code for ESP8266 -- ThinkSpeak Channel. Have spent much time making sure all is installed and seems to compile, load and run on ESP8266 Node MCU. Channel is set up and have ID and Author ID I can see the channel but nothing noted. I am getting the above return on serial monitor. Any help very gratefully recieved, please.

Is it possible to create a Simulink model that is independent of specific microcontrollers? For example, in the model, the STM32 block is used for CAN transmission. But if I want to deploy the same model to an Arduino, I have to replace the STM32 block with an Arduino-compatible one. So, is it possible to create a custom block or abstraction that works across multiple microcontrollers like STM32, PIC32, and Arduino without changing the hardware-specific block each time? Model based Embedded development with Microcontrollers I believe you can use the Arduino Support Package, without needing to develop custom blocks. See this example.

Sto tentando inutilmente di salvare il valore dell'enegia che consumo ogni giorno nel field5 di questo canale: https://thingspeak.mathworks.com/channels/2851490 , ma inutilemte in quanto vengono visualizzati sempre e solo 2 dati anche se ho impostato days=30. Ho provato ad aumentare a 365 ma senza variazioni. Come mai? Registrare un solo dato ogni giorno I believe fields 1,2,3,4 and 6 of the channel are being updated every 15 seconds. Field 5 appears to be only be updated much less frequently. When the charts are drawn, they pull up to the last 8000 feeds from the channel and plot them. Note that this is NOT the same as pulling up to 8000 points per field and then doing the plot. If you want to see field5 values also on a per 15s basis, ensure that field 5 is also updated at the same rate as other fields in the channel. NO, essendo un dato che varia solo ogni 24 ore, vorrei che venisse visualizzato 1 dato ogni 24 ore non un dato ogni 15 secondi come gli altri feed. E' possibile fare questo ? It appears that perhaps you have multiple sources updating the same channel at different frequencies. I would recommend you set up a separate channel for the data that is only updated daily. The view on that channel will show the graph you are looking for.

I simply want to regenerate my password which I am forgotten of one of my MQTT devices.

Hello, I've successfully tested the Processor-in-the-Loop (PIL) workflow in Simulink using a TI F28069M LaunchPad, following the standard examples provided by MathWorks. The PIL block, code generation, and communication all worked without issues. Now, I’d like to run a similar PIL setup using the Infineon TLE9879 EVALKIT (based on an ARM Cortex-M0), which is not officially supported by Simulink as a target. I’m wondering if it’s possible to configure PIL manually or via custom workflows. For example: Can I create a custom PIL target using Embedded Coder? Would I need to port rtiostream manually for communication over UART? Could I somehow integrate with Keil µVision (which I use for TLE9879) to build and run the generated code? Is there a workaround to simulate PIL behavior using a non-supported board? My setup: Simulink R2024b Infineon TLE9879 EVALKIT Keil µVision 5 + Infineon Config Wizard UART and JTAG interfaces available The main purpose is to validate control algorithms and measure execution time, not to implement a full HIL system. Has anyone attempted PIL with a custom or unsupported microcontroller before? Any tips or resources would be greatly appreciated. Thanks in advance! Is it possible to run PIL in Simulink with a non-supported microcontroller like Infineon TLE9879? simulink pil

Hi, my channel upated time showed current time and date, but data did not appear in channe and last entry was 5 hours ago

Hello, i want to write the power data from my Tasmota IR Device to my channels, but it does not work. I have created 3 channels and i use the correct write API in the script. I use the following script: >D >B =>sensor53 r >S if upsecs%20==0 then =>WebSend [api.thingspeak.com] /update.json? api_key=SZFFJSLVS0SFJ6FL&field1=%sml[1]%&field2=%sml[2]%&field3=%sml[3]% endif >M 1 +1,3,s,0,9600, 1,77070100010800ff@1000,Total consumption,kWh,total_in,2 1,77070100020800ff@1000,Total feed-in,kWh,total_out,2 1,77070100100700ff@1,Power,W,power_curr,0 # I get the messages in the console that the data was send but my channels stay empty. What do i miss ? Thanks for help Writing to ThingSpeak channels with Tasmota IR Power Reader try hard coding a value in this line WebSend [api.thingspeak.com] /update.json? api_key=xxxxxxxxxxxxxxxx&field1=%sml[1]%&field2=%sml[2]%&field3=%sml[3]% like this WebSend [api.thingspeak.com] /update.json? api_key=xxxxxxxxxxxxxxxx&field1=10 then after you have confirmed that, you can test to be sure the numbers from the power meter are being printed right. Also test writing to your channel via the browser address window just to be sure you have the syntax correct. You cen get the format from the API keys tab of you channel, on the right hand side, I do have the same issue ;( Hardcoding values from the browser work in the following format: https://api.thingspeak.com/update?api_key=xxxxxxxxxxxxxxxx&field1=4104.08&field2=401.95&field3=350.00 My tasmota device sends the following corresponding data: 22:39:33.360 SCR: performs "WebSend [api.thingspeak.com] /update.json? api_key=xxxxxxxxxxxxxxxx&field1=4104.08&field2=401.95&field3=350.00" What do i miss in the my script? Hi, I run in the same error. In my case ist was a blank ( ) after the update.json? in front of the api-key. I saw that in a capture and also in the tamota-console 00:33:39.242 SCR: performs "WebSend [api.thingspeak.com] /update.json? api_key=key&field1=7.05&field2=88.18" ==> WebSend [api.thingspeak.com] /update.json? api_key I delete the blank in the script and now it works. regards Niels tasmota script channel writing

I'm using an ESP32 to collect data from an MPU6050 sensor. The ESP32 buffers 170 samples at a time and uploads them to ThingSpeak using the bulk update API. However, the data entries received on ThingSpeak are inconsistent. Here's the pattern of total entries I see on the channel after each upload: After 1st upload: 170 entries (correct) After 2nd upload: 338 entries (should be 340) After 3rd upload: 499 entries (should be 510) After 4th upload: 657 entries (should be 680) After 5th upload: 818 entries (should be 850) As you can see, the expected total should increase by 170 each time, but it's losing a few samples in each batch, and the number of missing entries increases over time. The losses are not consistent — it seems like 1 or 2 samples get dropped randomly in each interval. Some things I’ve considered: The ESP32 is collecting and sending the full buffer (verified via serial debug). Could it be a payload size limit, HTTP timeout, or formatting issue? Maybe ThingSpeak is silently dropping malformed lines from the bulk update? Has anyone else run into this with buffered uploads to ThingSpeak? Any tips for debugging the exact cause of dropped samples? Thanks for any help!

how to post matlab output to a website by not using thingspeak?

Bom dia se alguém puder me ajudar, meu código abaixo, não estou conseguintdo conectar o meu Esp8266 ao ThingSpeak, o erro tá na conexão. Estou usando o MicroPython e NodeMCU na plataforma Pytohn o sistema operacional Ubuntu 20 # DHT11 -> ESP8266/ESP32 # 1(Vcc) -> 3v3 # 2(Data) -> GPIO12 # 4(Gnd) -> Gnd import time, network, machine from dht import DHT11 from machine import Pin from umqtt.simple import MQTTClient print("Iniciando...") dht = DHT11(Pin(12, Pin.IN, Pin.PULL_UP)) estacao = network.WLAN(network.STA_IF) estacao.active(True) estacao.connect('xxxxxxx', 'xxxxxxxxx') while estacao.isconnected() == False: machine.idle() print('Conexao realizada.') print(estacao.ifconfig()) SERVIDOR = "mqtt.thingspeak.com" CHANNEL_ID = "XXXXXXXXXXXXXXXXX" WRITE_API_KEY = "XXXXXXXXXXXXXXXXXXXXX" topico = "channels/" + CHANNEL_ID + "/publish/" + WRITE_API_KEY cliente = MQTTClient("umqtt_client", SERVIDOR) try: while True: dht.measure() temp = dht.temperature() umid = dht.humidity() print('Temperatura: %3.1f °C' %temp) print('Umidade: %3.1f %%' %umid) conteudo = "field1=" + str(temp) + "&field2=" + str(umid) print ('Conectando a ThingSpeak...') cliente.connect() cliente.publish(topico, conteudo) cliente.disconnect() print ('Envio realizado.') time.sleep(600.0) except KeyboardInterrupt: estacao.disconnect() estacao.active(False) print("Fim.") ***************************************************************************************************** No shell aparece como resposta: MPY: soft reboot Iniciando... Conexao realizada. ('192.168.0.23', '255.255.255.0', '192.168.0.1', '8.8.8.8') Temperatura: 29.0 °C Umidade: 63.0 % Conectando a ThingSpeak... Traceback (most recent call last): File "<stdin>", line 38, in <module> File "umqtt/simple.py", line 67, in connect OSError: -2 linha 38 é cliente.connect() Erro ao conectar: cliente.connect() It appears you're connecting to an incorrect server, mqtt.thingspeak.com instead of mqtt3.thingspeak.com. Start by modifying this example. python ubuntu

Hi, I tried to delete a channel data using POSTMAN as described here https://www.mathworks.com/help/thingspeak/clearchannel.html in Examples section: Use POSTMAN to Clear Channel The channel ID is correct, the write API key is correct, and the answer of postman after sending request is: { "status": "401", "error": { "error_code": "error_auth_required", "message": "Authorization Required", "details": "Please provide proper authentication details." } } I already tried to authorize me in Authorization tab using Basic Auth (username and password), but the result is the same. I already tried to use api_key in the request command directly: https://api.thingspeak.com/channels/1234567/feeds.json?api_key=XXXXXXXXXXXXXXXX The result is the same. 🙁 Does this channel deletion method work at all on ThingSpeak?