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Hi. I want to use matlab to calculate some data from my channel and send it ti new field. But even simple code cannot be done. What i do wrong? Every time i getting error : "URL is incorrectly formed, or the requested feature is not supported in this version of ThingSpeak". Here it is (channel is private): readChannelID = 1071866; writeChannelID = 1071866; humidityFieldID = 1; readAPIKey = 'xxxx'; writeAPIKey = 'yyyyy'; [hum1,time] = thingSpeakRead(readChannelID,'Fields',[humidityFieldID],'ReadKey',readAPIKey); thingSpeakWrite(writeChannelID, hum1,'Fields',5,... 'TimeStamps', timestamps,'WriteKey',writeAPIKey);