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Hi panos.ioannidisThe .ino code that I posted has the code to push the data to ESP8266. There is no additional program needed for the ESP8266 as long as you already set this up using AT command to talk to your wi-fi. There is a link in the step aboves on how you can setup your ESP8266 to connect to your wi-fi. To send them to thingspeak.com, you need to set an account in thingspeak.com and then it will give you some identification or key that is unique to your data.Again the .ino code that I posted has this built into it. See line 36. Hope this helps.
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