MATLAB: Error using thingSpeakWrite Expected a string scalar or character vector for the parameter name.

iotMATLABscalarThingSpeak

I need to send data from MATLAB output to a field on ThingSpeak?

this is my current code…….

% Enter your MATLAB Code below
opts = weboptions('Timeout',15);
data = webread('https://api.thingspeak.com/apps/thinghttp/send_request?api_key=PC4EOCTMNDPPQOSW',opts)
writeChannelID = xxxxx;
% TODO - Enter the Write API Key between the '' below:
writeKey = 'xxxxxxxxxx';
thingSpeakWrite(writeChannelID, data, writeKey);

but it comes up with this in the output????

Lounge_Temp
18
Loft_Temp
6
Lounge_Humidity
62
Loft_Humidity
88
' must be a string scalar or character vector that can represent a field name.

Any ideas how to fix?

Best Answer

Isnt this the API ? You missed the 'WriteKey' key in your API call?

thingSpeakWrite(channelID, data, 'WriteKey', writeAPIKey)

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