LoRaWanGateway

A LoRaWan Gateway in LUA

Goals

Port the OneChannelGateway to NodeMCU/LUA (https://github.com/things4u/ESP-1ch-Gateway) - Done!
Add support for sending messages to nodes - Done!
Add support for OTAA - Done!
Add support for receiving multiple SF's on a channel - Done!
Add support for more than one channel

Why LUA?

Lua is an event driven language, which is a good match for a gateway: a gateway has to respond to incoming messages from nodes and routers. The LoraWanGateway runs on a ESP8266 chip, with the NodeMCU firmware it runs a full WiFi stack and a lua runtime. The NodeMCU contains a lot of libraries that are usefull for a gateway: WiFi, NTP support, SPI, 6 timers, json support etc.

Hardware

In order to run a LoRaWanGateway you need

A ESP8266 module
A SX1278 module
A way to flash your ESP8266

Connections

ESP PIN	SX1276 PIN
D1	DIO0
D2	DIO1
D5	SCK
D6	MISO
D7	MOSI
D0	NSS
GND	GND
3.3V	VCC

How to run

The LoRaWanGateway needs quite some RAM and processing power, so it it necessary to flash firmware that uses as little resources as possible. Therefore you have to build NodeMCU firmware containing only the modules needed.

Get the NodeMCU firmware on http://nodemcu-build.com/index.php
- select the dev branch
- select the following modules: bit,cjson,encoder,file,gpio,net,node,rtctime,sntp,spi,tmr,uart,wifi
Flash the integer version on your ESP8266
Format ESP8266 filesystem
Register your wifi network
- In the lua shell run
  - wifi.setmode(wifi.STATION)
  - wifi.sta.config("your SSID","your key")
  - wifi.sta.autoconnect(1)
  - wifi.sta.connect()
- Your ESP8266 will remember your wifi settings!
Upload all files in the src directory to your ESP8266
Restart your ESP8266
The LoRaWanGateway will start after first compiling all your sources

The LoRaWanGateway is configured to listen on EU channel 0.

Changing the configuration can be done in init.lua (channel, location of gateway, pin mappings for DIO0 and DIO1)

It will listen to all spreading factors but only on one specific channel. It will send on whatever channel or datarate the router seems fit...

Revisions