A LoRaWan Gateway in LUA
- 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
- Add support for more than one channel
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.
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 |
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!
- In the lua shell run
- 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, SF7BW125
Changing the configuration can be done in init.lua (channel, SF, location of gateway)
It will only listen on a specific channel, but will send on whatever channel or datarate the router seems fit...
- 2016-07-04 changed SX1278 NSS pin to D0
- 2016-07-03 refactor to use integer version of firmware in order to have more free resources
- 2016-07-02 initial revision