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Hallo,
ich Neuling hier, und habe das Beispiel WriteMultipleFields benutzt um die Funktionsweise zu verstehen.
So weit so gut, hat auch alles grklappt. Jetzt nach 2 Tagen bekomme ich immer eine Fehlermeldung.
Problem updating channel. HTTP error code -401 abwechselnd mit
Channel update successful.
Es ist immernoch die gleiche Software, Board ist WiFi LoRa 32 V3.
Buongiorno, non mi è possibile connetermi al canale di thingspeak che ho creato, per passare i dati tramite MQTT. Il codice segue la libreria PubSubClient su arduino ide, l'errore restituito dal serial monitor dell'ide é: -4 : MQTT_CONNECTION_TIMEOUT - the server didn't respond within the keepalive time.
Allego il codice per eventuali verifiche:
Grazie per a disponibilità
#include "PubSubClient.h"
#include <ESP8266WiFi.h>
#include "secrets.h"
bool DEBUG = false; // true=serial message of debug enabled
char* server = "mqtt.thingspeak.com";
WiFiClient wifiClient;
PubSubClient client(server, 1883, wifiClient);
String payload;
// BME280 Setting
#include <Wire.h>
#include <Adafruit_BME280.h>
//#define SEALEVELPRESSURE_HPA (1013.25)
Adafruit_BME280 bme; // I2C
bool BMEStatus;
ADC_MODE(ADC_VCC); // Set ADC for read Vcc
// Update time in seconds. Min with Thingspeak is ~20 seconds
const int UPDATE_INTERVAL_SECONDS = 3600; //il clock interno ha un errore del 5% questo valore va tarato sperimentalmente
//const int UPDATE_INTERVAL_SECONDS = 60; // caricamento ogni minuto solo per test
void setup()
{
// Connect BME280 GND TO pin14 OR board's GND
pinMode(14, OUTPUT);
digitalWrite(14, LOW);
Serial.begin(115200);
delay(10);
// BME280 Initialise I2C communication as MASTER
Wire.begin(13, 12); //Wire.begin([SDA], [SCL])
BMEStatus = bme.begin();
if (!BMEStatus)
{
if (DEBUG) { Serial.println("Could not find BME280!"); }
//while (1);
}
// Weather monitoring See chapter 3.5 Recommended modes of operation
bme.setSampling(Adafruit_BME280::MODE_FORCED,
Adafruit_BME280::SAMPLING_X1, // temperature
Adafruit_BME280::SAMPLING_X1, // pressure
Adafruit_BME280::SAMPLING_X1, // humidity
Adafruit_BME280::FILTER_OFF );
// read values from the sensor
float temperature, humidity, pressure;
if (BMEStatus)
{
temperature = bme.readTemperature();
humidity = bme.readHumidity();
pressure = bme.readPressure() / 100.0F;
}
else
{
if (DEBUG) Serial.println("Could not find BME280!");
temperature=0;
humidity=0;
pressure=0;
}
float voltage = ESP.getVcc();
voltage = voltage/1024.0; //volt
if (DEBUG)
{
Serial.println("T= " + String(temperature) + "°C H= " + String(humidity) + "% P=" + String(pressure) + "hPa V=" + voltage + "V");
}
// Construct MQTT payload
payload="field1=";
payload+=temperature;
payload+="&field2=";
payload+=humidity;
payload+="&field3=";
payload+=pressure;
payload+="&field4=";
payload+=voltage;
payload+="&status=MQTTPUBLISH";
//Connect to Wifi
if (DEBUG)
{
Serial.println();
Serial.print("\nConnecting to WiFi SSID ");
Serial.print(SECRET_SSID);
}
WiFi.begin(SECRET_SSID, SECRET_PASS);
int timeOut=10; // Time out to connect is 10 seconds
while ((WiFi.status() != WL_CONNECTED) && timeOut>0)
{
delay(1000);
if (DEBUG) { Serial.print("."); }
timeOut--;
}
if (timeOut==0) //No WiFi!
{
if (DEBUG) Serial.println("\nTimeOut Connection, go to sleep!\n\n");
ESP.deepSleep(1E6 * UPDATE_INTERVAL_SECONDS);
}
if (DEBUG) // Yes WiFi
{
Serial.print("\nWiFi connected with IP address: ");
Serial.println(WiFi.localIP());
}
// Reconnect if MQTT client is not connected.
if (!client.connected())
{
reconnect();
}
mqttpublish();
delay(200); // Waiting for transmission to complete!!! (ci vuole)
WiFi.disconnect( true );
delay( 1 );
if (DEBUG) { Serial.println("Go to sleep!\n\n"); }
// Sleep ESP and disable wifi at wakeup
ESP.deepSleep( 1E6 * UPDATE_INTERVAL_SECONDS, WAKE_RF_DISABLED );
}
void loop()
{
//there's nothing to do
}
void mqttpublish()
{
// read values from the sensor
float temperature, humidity, pressure;
if (DEBUG)
{
Serial.print("Sending payload: ");
Serial.println(payload);
}
// Create a topic string and publish data to ThingSpeak channel feed.
String topicString ="channels/" + String( channelID ) + "/publish/"+String(writeAPIKey);
unsigned int length=topicString.length();
char topicBuffer[length];
topicString.toCharArray(topicBuffer,length+1);
if (client.publish(topicBuffer, (char*) payload.c_str()))
{
if (DEBUG) Serial.println("Publish ok");
}
else
{
if (DEBUG) Serial.println("Publish failed");
}
}
void reconnect()
{
String clientName="MY-ESP";
// Loop until we're reconnected
while (!client.connected())
{
if (DEBUG) Serial.println("Attempting MQTT connection...");
// Try to connect to the MQTT broker
if (client.connect((char*) clientName.c_str()))
{
if (DEBUG) Serial.println("Connected");
}
else
{
if (DEBUG)
{
Serial.print("failed, try again");
// Print to know why the connection failed.
// See http://pubsubclient.knolleary.net/api.html#state for the failure code explanation.
Serial.print(client.state());
Serial.println(" try again in 2 seconds");
}
delay(2000);
}
}
}
How to Simulate a Synchronous Compensator in Simulink?
I have been having problems sending ThingSpeak alerts so I created a simple routine that demonstrates the problem. The code executes successfully but I never receive an email with the alert. What am I doing wrong?
% Set Thingspeak address, alerts API key, and options for the HTTTP call
alertUrl = "https://api.thingspeak.com/alerts/send";
alertApiKey = "TAKxxxxxxxxxxxxxxxx";
options = weboptions("HeaderFields",["ThingSpeak-Alerts-API-Key",alertApiKey]);
% Set content for email subject and body.
alertSubject = "ThingSpeak Alert Subject";
alertBody = "ThingSpeak Alert Body";
% Catch errors so the MATLAB code does not disable a TimeControl if it fails
try
webwrite(alertUrl, "body", alertBody, "subject", alertSubject, options);
catch Exception
fprintf("Failed to send alert: %s\n", Exception.message);
end
Am running multiple sensors in the field producing strings of data then sending them to a node. The node is an Arduino Uno on which SIM 800 is attached for internet connectivity. After computation, the result is several strings that i want to display to things speak. The code i have so far can only upload numerical data. Am in need of help to display these strings in Thingsspeak.Help me.
Dear Team,
I have populated my data on ThingsBoard platform using ESP8266, now I want to read that data using MATLAB Industrial Communication Toolbox. I have written a code for this purpose below,
% Replace these values with your ThingsBoard MQTT broker details
brokerAddress = "ssl://demo.thingsboard.io"; % Adjust the broker address
port = 1883; % Use the appropriate port for secure MQTT
% Replace these values with your ThingsBoard device details
clientID = "";
userName = "";
password = ""; % Leave empty if not required
% Replace this with the path to the root certificate you downloaded
rootCert = "";
% Create an MQTT client
mqClient = mqttclient(brokerAddress, 'Port', port, 'ClientID', clientID, ...
'Username', userName, 'Password', password, 'CARootCertificate', rootCert);
% Check if the connection is established
mqClient.Connected
% Expected output: ans = int32(1)
% Subscribe to the telemetry topic
topicToSub = "v1/devices/me/telemetry";
subscribe(mqClient, topicToSub);
% Wait for a while to receive messages (adjust the time as needed)
pause(60);
% Peek at the MQTT client to view received messages
peek(mqClient);
% Close the MQTT client
clear mqClient;
%%%%__________________Output Result______________________%%%%%
>> MQTT_Receive
Warning: Using a port that allows unencrypted communication. For confidential matters, considering using an encryption
enforcing port, such as 8883.
Error using MQTT_Receive
Failed to establish a connection with broker "ssl://demo.thingsboard.io".
I desperately seeking your assistance in this regard
I'm logging data which I'd like to see on a daily basis. ie each day the chart x axis resets to 12midnight to 12midnight for the current day and just shows todays data. Is this possible please ?
Hello
I have been using ThingSpeak for about 2 years with no problems. I am observing sensor data and connecting widgets to some of the values. Since yesterday, there are some of the widgets that send blank values. Have you changed something?
Thank you
Hello, all!
This is my first post after just joining this discussion, so please forgive me and provide kind assistance if I have posted to the wrong subsection!
I have a good interest in learning sql server course and right now I am taking help from various platforms like https://www.coursera.org/ https://www.udemy.com/
Also I have a doubt that is it a good option to learn from platforms like this or I should go for some sql server online training . I have searched for the solution of my queries in various above platforms which helped me up to some extent only as it was not directly given by any expert or trainer.
Hoping in getting a quick response
Thankyou in advance.
Hello, I am a student and I am working on a neural network for a line follower car and I would like you to recommend a tutorial to implement it in simulink.
Hello, I would like to send temperature and humidity data from my ThingSpeak channel to the https://www.wunderground.com/ service. I managed to configure the initial connection through ThingHTTP, and on the WeatherUnderground website, there is information about data updates, but there are no actual values: https://www.wunderground.com/dashboard/pws/IKORON5/table/2023-11-19/2023-11-19/daily
I don't know how to correctly configure all the options in ThingHTTP and in the Apps - React section.
The title is resonably non-descript, but I can explain it easily:
Say I have an initial Emax model:
v = emax1*[G]^n1/(ec501^n1+[G]^n1)
And I want to place v inside of a second Emax model:
y = emax2*v^n2/(ex502^n2+v^n2)
Currently, I have the full function of v inside y, twice, it's very long and whilst I only need to get it correct once, for readability in the future I'd rather have it in form #2. I've played around with non-constant parameters but I need the steady state to be v, not the rate rule, and I haven't worked out how to make a parameter shift to a form like v, as an observation might.
Are there any recommended solutions or do I simply need to keep with having v fully expressed in y?
Thank you,
Dan
when I examine the data stream on an arduino ide I get a lot of "stuff" which I dont understand.
1 what does it mean?
2 how do I prevent it?
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=xxxxxxxxxxxxxxxx&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
good afternoon everyone my name is Dundu lawan haruna ,i'm a final year student at the department of computer engineering ABU Zaria, Nigerian , and i wanted to do my final year project based on computer vision : project topic , designing an eye glasses to help those people with visual imparement to be able to navigate enviroment efficiently , that's why i need a support from you guys ,all advised are highly well come , thank you for your support.
I am collecting Data at 1 minute intervals using esp8266, the data is then sent to Thingspeak on the minute intervals. However I would like to store the data collection on the esp Ram. I am using batteries to power the circuits , if I can store the data and send it on demand I can save quite a bit of battery energy (used up by wifi) - (I already use sleep mode between intervals). As well as using Thingspeak to visuliase the data, I also use a third part app called Thingview which 'feeds' off thingspeak. I am looking for a way to trigger the 'data send' upon opening thinkspeak chanel,so rather than sending every minute it might need to be accessed two or three times a day, is this possible?
Thanks Edward
Hi!
I can't see my data in the charts. I'm using arduino wifi and the connection works.
Maybe I did something wrong in this options
Is there a way to get a handle or link to the database each time I do a WRITE or group of WRITEs? I need to access the set of records that comprises a user session, which could be many WRITEs. My impression is that Thingspeak appears as a continuous stream with no way to mark a set of WRITEs as a group or session. Methods I have tried like retrieval (READs) using timestamps and other after-the-fact queries are not very accurate or user friendly. Thanks.
Hi All,
I'm currently attempting to implement a Hodgkin-Huxley-type model of membrane potential, ideally I would like a species that represents the membrane potential as its own distinct entity, so as the reference elsewhere. I've currently established a molarity-based work around but it would be great if I could set the units for the species as millivolt, but that throws an error.
Is there an established way to do this? I imagine I'm not the first person to be trying to model a voltage-gated ion channel!
Thank you for your help.
Hello,
I've looked around and I haven't found anything obvious about this, but is it possible to link to species/reactions, graphically, in a non-mass transfer sense? I have areas in my model where it would conceptually make sense to be able to see that species or reactions are linked, but if I link them in the standard way it demands that it be involved in the stoichiometry.
Perhaps some kind of dotted line, or similar?
Thank you, best regards,
Dan
