garthoff / el-client

Arduino client for esp-link's REST, MQTT, and command interface

ELClient

This is a Wifi library for arduino that uses the SLIP protocol to communicate via serial with an ESP8266 module running the esp-link firmware.

Features

• C++ classes to manage the communication with esp-link

• Support outbound REST requests

• Support MQTT pub/sub

• Support additional commands to query esp-link about wifi and such

• MQTT functionality:

  • MQTT protocol itself implemented by esp-link
  • Support subscribing, publishing, LWT, keep alive pings and all QoS levels 0&1

• REST functionality:

  • Support methods GET, POST, PUT, DELETE
  • setContent type, set header, set User Agent

Installation

1. Clone this project:

git clone https://github.com/jeelabs/el-client
cd el-client

2. Program the ESP8266:

• Wiring:
• Program release firmware:

esp8266/tools/esptool.py -p COM1 write_flash 0x00000 esp-link/0x00000.bin 0x40000 esp-link/0x40000.bin

3. Wiring:

4. Import arduino library and run example:

Example read DHT11 and send to thingspeak.com

• espduino/examples/thingspeak/thingspeak.ino
• Using DHT11 library from: https://github.com/RobTillaart/Arduino