README.md

LoRa Explorations

Various PlatformIO projects exploring TTGO LoRa boards.

References

Hardware

TTGO LoRa32

• ESP32
• SX1276 LoRa chip
• TP4054 Battery management
• CP2102 USB interface
• SSD1306 0.96 inch 128X64 OLED
• 32MB flash
• User LED = IO25

• https://github.com/LilyGO/TTGO-LORA32
• Schematic

TTGO LoRa T-Beam v1.1

• ESP32 Rev1
• NEO-6M GPS Module
• AXP192 Battery management
• CP2104-GMR USB interface
• SSD1306 0.96 inch 128X64 OLED
• 4MB PSRAM
• 4MB Flash
• No user LED (but possibility to repurpose AXP Charging LED)

• Product page
• https://github.com/LilyGO/TTGO-T-Beam
• Schematic

Libraries

ESP32

• https://en.wikipedia.org/wiki/ESP32
• API Documentation

LoRa

• LoRa Library
• LoRa Library API
• Frequency Plans (TTN)

OLED - SSD1306

• ThingPulse SSD1306Wire Library

GPS

• TinGPS++
• documentation

AXP Battery Management

• https://github.com/lewisxhe/AXP202X_Library

Demos & other inspiration

• https://github.com/Xinyuan-LilyGO/LilyGO-T-Beam - lots of exapmles and links to datasheets etc.

Videos

• #149 ESP32 Deep Sleep, RTC Memory, "Secret" LoLin Pins
• #172 Hidden: ESP32 and ESP8266 point-to-point (ESP-Now): Fast and efficient. Comparison with LoRa
• #188 Antenna Tutorial incl. cheap DIY Antenna Tester (LoRa, ESP32)
• #224 Are these boards ok? New LoRa boards tested (mainly TTGO ESP32)
• #252 ESP32 Ultra Low Power (ULP) core made easy in the Arduino IDE including 100$ challenge
• #264 PlatformIO for Arduino, ESP8266, and ESP32 Tutorial
• #328 ESP32 Secrets: Interrupts, and Deep-Sleep under the Hood
• #337 LoRa Mesh Communication without Infrastructure: The Meshtastic Project (ESP32, BLE, GPS)
• Which ESP32 pins are safe to use?
• ESP32 Pins.xlsx