We build a GPS enabled LoRa module, that logs the signal strength and allows us to draw a heat map of LoRa coverage in our area.
How to use the WEMOS TTGO with the adafruit ssd1306 library.
Sites in China and eBay sell an ESP8266 module with 4MB flash and a build-in 0.91″ monochrome OLED display and a rechargeable battery port.
The module allows to create a minimal WiFi enabled, battery powered system that displays IoT messages.
Updated Arduino Nano Eagle library.