You can use these devices either as a gateway, or as a node, to connect to The Things Network.
You can override default Heltec WiFi LoRa 32 (V2) settings per build environment using board_*** option, where *** is a JSON object path from board manifest heltec_wifi_lora_32_V2. All I really cared about was WiFi and LiPo the OLED display on it is a gratuitous extra for me. I tried to access the display using the standard SSD1306 librry that way: #ifdef CONTR_IS_HELTEC SSD1306Wire display(0x3c, 15, 4) //OLED 128*64 soldered #endif since they announced to use GPIO15 as SCL and GPIO04 as SDA. This is the Heltec ESP32 LoRa gateway sketch. I would stick with the official ESP32 core for the Arduino as it supports your board already and then just copy/clone the examples/libraries you need from the Heltec repository. LoRa is a wireless data communication technology that uses a radio modulation technique that can be generated by Semtech LoRa transceiver chips.
96″ small I2C based Display with ESP32 DevKit using only two IO lines.
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