I recently discover Cayenne and thingspeak. Cayenne sounds interesting because we have nice interface for web and phone.
As well we can act on data as an easy web by button.
Thingspeak is interesting beacause we can use matlab to analyze, replot and reuse values.
Is there a way to connect the arduino to the cayenne mqtt server and to thingspeak ? (I am using an arduino with esp8266 with the librairie: #include <CayenneMQTTESP8266Shield.h>)