Important: Please notice that we are using Version 1 or the TTGO LoRa32 module!

The TTGO LoRa32 OLED V1 module is based on the ESP32 microcontroller. The ESP32 itself is capable of communicating via WIFI as well as BLE (Bluetooth low energy). The latter can be used to communicate directly with a smartphone. This TTGO module is further equipped with a LoRa transceiver (SX1276, 868/915 MHz) to provide an additional communication channel. Furthermore it has a nice OLED display to communicate with humans.

Fig.: TTGO LoRa32 OLED V1.
Image Source: RandomNerdTutorials

Fig.: TTGO LoRa32 OLED V1, bottom view.

The problem is that the breadboards we are using have very tight clamps to push the pins in.

A potentiometer is used to simulate an environmental sensor.