LoRaWAN

LoRaWAN implementation with temperature and humidity sensor / display based on LilyGo T-Echo, LoRaWAN gateway RAK7246G / RAK5146 and TTN

Project plan

1. connect temperature / humidity sensor SHT31 to T-Echo Lite ==> achieved
2. show the measurements on the display of T-Echo Lite ==> achieved
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)

1. Connect sensor to T-Echo

• connect SHT31 to T-Echo Lite using the following pins

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

2. Show measurements on T-Echo

• achieved with "Sensor connected" submission to GitHub

3. Configure gateway

• configure gateway network, internet access, LoRa band, TTN network

RAK7246G:

• RAK7246G Quick Start Guide
• verify / change the TTN server name to new TTN V3 name (assuming EU1 selected in gateway setup in TTN): eu1.cloud.thethings.network
• enable and restart LoRa services (assuming service name ttn-gateway): sudo systemctl enable ttn-gateway | sudo systemctl start ttn-gateway | sudo systemctl status ttn-gateway
• verify communication of the gateway with TTN: sudo journalctl -u ttn-gateway -f

RAK5146 PiHAT Kit for LoRaWAN and Concentrator (SPI model)

• 1. RAK5146 Setup with LoRa Basic Station
• 2. Setting Up a LoRa Gateway with Raspberry Pi and RAK5146
• 3. RAK Common for Gateway
• 4. RAK2287 Quick Start Guide
• Raspberry Pi OS setup acc. 1.
• Remote connection via SSH acc. 1.
• Post-installation steps (Update, upgrade and reboot Raspberry Pi) acc. 1
• Setup Raspberry Pi’s Interfaces (SPI, I2C) acc. 1.
• Install RAK Common for Gateway acc. 2. and 3.
• Configure the Gateway for TTN acc. 2. and 4.
• verify / change connection to TTN server as for RAK7246G

4. Register in TTN

• register the gateway with TTN (outdated, still helpful)

  • RAK7246G LoRaWAN Network Server Guide

• create organization and application in TTN (outdated, still helpful)

  • Setup LoRaWAN Network in TTN

• register gateway in TTNS

  • Setup LoRaWAN gateway on TTN Gateway Pro

5. Get TTN application keys

• register application with TTN (outdated)
  • RAK7246G LoRaWAN Network Server Guide
• create a custom end device in TTN console
  • JoinEUI: enter 00 00 00 00 00 00 00 00
  • DevEUI: use generate button to create new device ID
  • AppKey: use generate button to create new application key

6. 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