In my previous blog post I showed how I used several Wemos D1 mini to make a network of wireless temperature sensors around RasPiTV HQ. These litle boards are based on the ESP8266 microcontroller with built-in WiFi. There is a Pro version available too. One of its main benefits is that you can attach an external WiFi antenna for greater range. This is an optional feature, and it does require some delicate surgery to reroute the antenna signal from the built-in ceramic antenna, to the external socket. It’s not especially difficult once you know what […more…]