An IoT Prometheus exporter for measuring temperature using an ESP8266 (Arduino-compatible) with a Wi-Fi module and a DS18B20 (temperature) sensor. ESP8266-based board (or some other appropriate ...

Go to Tools -> Board and select "NodeMCU 1.0 (ESP-12E Module)". Install the Servo library by going to Sketch -> Include Library -> Manage Libraries, searching for "Servo" and installing it. Same for ...