Connections

These are pin connections for the LoRa module and the OLED connected to the ESP32.

NOTE: Connect the antenna to the SX 1278 module (do this for both modules).

RA-02-SX1278 Module

ESP32 PinRA-02-SX1278 Pin
D5NSS
D23MOSI
D19MISO
D18SCK
GNDGND
3v33v3

OLED

ESP32 PinOLED Pin
D21SDA
D22SCL
GNDGND
3V33V3

18650 Power Supply

ESP32 Pin18650 Power Supply Pin
GND-ve
Vin+ve