would it be possible to add on a esp8266 (node mcu) to obtain wireless comunication on board ? instead of having to add a travel router such as the one in the link below?
Thanks
https://www.newegg.com/Product/Product.aspx?Item=9SIA3PA1D86669
OpenSprinkler 3.0 has built-in ESP8266: https://opensprinkler.com/product/opensprinkler/