DHT11 sensor not shown values in ThingSpeak
Latest activity Reply by Christopher Stapels
on 11 May 2023
Dear team,
i have issue regarding not shown values thingspeak
13 Comments
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dear team, I have a problem logging into ThingSpeak
Can you describe your hardware (what microprocessor are you using) and perhaps show some of the code you are using to connect to ThingSpeak and how you are writing the data to ThingSpeak. Aslo please show us the response you are getting and describe the response you are expecting.
Hello Sir I am getting Signin issues can you help me out...
thingspeak is automatically getting logging out.
Dear Sir,
Thank you for your valuable responce...
I am using ESP8266 Nodemcu with wifi module. ya it is sowing values on thingspeak.
I have another question??
in ESP8266 nodemcu with can i connect with 24vdc sensor, it is possible to connect???
if YES, then which module we can use in-between esp8266 and 24vdc hydraulic sensor.
if NO, your answer_______________________________
i want to connect 24vdc temperature sensor to ESP8266 Node mcu?
i am waiting your valuable response...
Thanks & Regards,
Radhakrishna
I'm not clear exactly what you are asking. In general, you cannot conenct 24 V sesnsors to a 3.3 V board. But you can use circuitry in between the two objects to bring the voltage down or re interpret the signals. I would need more information about the sensor, but its not really a ThingSpeak issue.
Dear sir, I am using esp8266 microcontroller temperature sensor send values to mail and notification to mail It is possible to send
ESP8266 can definitely interact with ThingSpeak to update values from a sensor and trigger email alerts.
Dear Sir, Can you tel me steps to email notification on thingspeek
Sure! See the documentation page for the send alert API, and here is an example showing how to analyze data in your channel to trigger an alert.
Dear Sir,
message showing given bellow.
can you take online my laptop
error using Temperature & Humidity monitoring System tem1
Specify a valid read API key, or make the channel public to avoid specifying the read API key.
It seems that you are reading data from a private channel, so you need to supply the API key in the thingSpeakRead command. Have a look at the thingSpeakRead documentation to see how to use the read API key.
dear sir,
i have problem in this code
can you send me code for temperature and humidity i created this code, but it is not working please send code for temperature and humidity
Note:iwill past my code here....
% Store the channel ID for the sensors channel.
channelID = 2102228;
% Provide the ThingSpeak alerts API key. All alerts API keys start with TAK.
alertApiKey = 'TAKxxxxxxxxxxxxxxxx';
% Set the address for the HTTTP call
alertUrl="https://api.thingspeak.com/alerts/send";
% webwrite uses weboptions to add required headers. Alerts needs a ThingSpeak-Alerts-API-Key header.
options = weboptions("HeaderFields", ["ThingSpeak-Alerts-API-Key", alertApiKey ]);
% Set the email subject.
alertSubject = sprintf("Weather Monitoring System Update");
% Read the recent data.
temperatureData = thingSpeakRead(channelID,'NumDays',1,'Fields',1);
humidityData = thingSpeakRead(channelID,'NumDays',1,'Fields',2);
% Check to make sure the data was read correctly from the channel.
if (temperatureData > 27) & (humidityData < 80);
alertBody = "It is gonna be a sunny day";
else (temperatureData < 27 & (humidityData > 80);
alertBody = "It is gonna be a rainy day";
end
% Catch errors so the MATLAB code does not disable a TimeControl if it fails
try
webwrite(alertUrl , "body", alertBody, "subject", alertSubject, options);
catch someException
fprintf("Failed to send alert: %s\n", someException.message);
end
Your channel (2102228) is set to private. You need to provide the read api key to thingSpeakRead in this section.
temperatureData = thingSpeakRead(channelID,'NumDays',1,'Fields',1);
humidityData = thingSpeakRead(channelID,'NumDays',1,'Fields',2);
Please go to the docuemntation link that I supplied above to get the correct syntax.
You might have an easier time testing your code at MATLAB online. Use this link to MATLAB home and them click the blue button at the top to use MATLAB online.
Then you can copy the code back to ThingSpeak for automation.
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