I try to use Arduino Uno with ESP8266-07 shield with Soft Serial connection. It’s work for blynk, but I can not find example for Cayene. I choose “Arduino Uno”, “WiFi Shield”, get code but at serial monitor see only “ WiFi shield not present”.
I wanted to share that we’ve just provided support in our MQTT Arduino library for using ESP8266 as a shield We’ve done basic testing and works well. Give it a try for your project and let us know how it works out for you !