LoRaWAN

LoRaWAN implementation with temperature and humidity sensor / display based on LilyGo T-Echo, LoRaWAN gateway RAK7246G and TTN

Project plan

1. connect temperature / humidity sensor SHT31 to T-Echo Lite
2. show the measurements on the display of T-Echo Lite
3. configure the gateway and register it with TTN
4. create application in TTN and get the TTN keys
5. extend the code on T-Echo Lite about LoRaWAN implementation (sensor authentication, measurement upload)

Connect sensor to T-Echo

• connect SHT31 to T-Echo Lite using the following pins (to be verified)

Sensor pin	T-Echo pin	Arduino pin
VCC	3V3	3.3V power
GND	GND	Ground
SDA	P1.04 (PI.04)	36
SCL	P1.03 (PI.03)	35

Show measurements on T-Echo

Configure gateway

• configure gateway network, internet access, LoRa band, TTN network RAK7246G Quick Start Guide

Register in TTN

• register the gateway with TTN RAK7246G LoRaWAN Network Server Guide

Get TTN application keys

Send measurements to TTN

• use RadioLib in LoRaWAN mode
• implement OTAA (over the air activation) of the sensor / T-Echo
• create the LoRaWAN payload for measurement data with CayenneLPP
• use CayenneLPP library to create LoRaWAN paylod