Imported from GitHub: cziter15/raesp_gateway · commit 7a3715d · license GPL-3.0

Description

:satellite: A standalone device project featuring SX1278 and ESP8266 components, serving as a radio-WiFi gateway. The primary objective is to provide support for OOK remote power outlets, with the flexibility for potential future integration of LoRa 433 and other communication protocols, thanks to its adaptable hardware.

README

Project: RaESP Gateway

Ra-02 (SX1278) + ESP12-S (ESP8266) gateway

What and why?

A few years ago (2018), when I began designing electronics for fun, I made something like a WiFi-controlled 433 MHz remote for RC power outlets I bought from the store. The first version was a mess because I had no clue how to design a PCB. I just connected all the 'wires' on a two-layer board and flooded everything with ground. It worked, but not as reliably as I hoped. Later, I redesigned the board with a focus on minimizing current loops, but even then, not everything worked as intended. More info here.

In the end, I decided to switch to the Ra-02 instead of the RFM110W. It's theoretically a much better choice because it's programmable and not just a transmitter, but also a transceiver. This means I can both send and receive messages, without being limited to OOK. It even supports LoRa, FSK, and more!

Hardware overview

To build my PCB, I kept the component count minimal—just a few capacitors, resistors, an LDO regulator (AMS1117) to step down 5V from USB to 3.3V for the modules, an ESP12-S (ESP8266-based module) as the application brain for WiFi connectivity, and a RA-02 (SX1278-based module) to handle all the RF work.

Software overview

The software is C++ based and powered by ksIotFrameworkLib. It currently supports MQTT and implements the following protocols:

• Ningbo RF protocol
• Nexa RF protocol

At the moment, it only works in transmitter mode, but it's also possible to implement LoRa functionality in the future.