MQTT IR transceiver

ESP8266 based gateway between MQTT and IR. Code compatible with PlatformIO. Works with ESP-01 (debug mode have to be disabled in globals.h)

Features

• Receiving of IR transmission and publish it as MQTT messages
• Receive MQTT messages and send IR signal (multiple formats supported - NEC, RC5, LG, SONY, Global Cache )
• Storing raw IR messages on flash and transmitting via IR
• Constant current IR LED emitter circuit (based on Analysir schematic )
• MQTT over SSL support
• OTA updates

Working modes

IR transmitting

IR receiving

Used librariers

• IRremoteESP8266 - https://github.com/markszabo/IRremoteESP8266/
• ArduinoJson - https://github.com/bblanchon/ArduinoJson
• PubSubClient - https://github.com/knolleary/pubsubclient
• WiFiManager - https://github.com/tzapu/WiFiManager

Installation

GPIO connections:

For ESP01 following changes have to take place:

• in platformio.ini change board from d1_mini to esp01_1m
• in globals.h comment out line "#define DEBUG X"

Schematic

BOM

• D1,D2 - 1N4148
• Q1 - NPN transistor
• IR1 - IR receiver
• IR LED1, IR LED2 - Infrared LED
• R1 - 3.3kΩ
• R2 - 2.5Ω

Requirements:

• Visual Studio Code
• PlatformIO IDE extenstion
• GIT

1. Clone the Repository into VS Code

In VS Code press F1 enter ''git: clone'' + Enter and insert link to my repository (https://github.com/piotrC4/mqtt-ir-transceiver)

2. Modify platformio.ini (optional)

Edit platformio.ini and setup upload_port variable acording to system settings if PlatofmIO can'd identify proper COM port

3. Build binary file

In PlatformIO menu choose PROJECT TASKS -> Build

4. Upload firmware to ESP8266

Connect ESP to PC via serial adapter. In PlatformIO menu choose option PROJECT TASKS -> Upload.

Usage

Configuration

During first boot device will act as AP with SSID IRTRANS-XXXXXXXX (password is XXXXXXXX). Connect to this AP and go to http://192.168.4.1. Configure WIFI and MQTT paramters.

Resetting configuration

If during boot device have is pressed, device will go to configuration mode.

Controller → Device communication

Device → Controller communication

Integration with OpenHab

• Run MQTT server (mosquitto is fine)
• Configure MQTT server for OpenHab transport
• Register IR Transceiver to the same MQTT server (for example MQTT prefix is 'esp8266/02')
• Example items configuration:

Group gIR <own_ir> (All)
Switch   ir_philips_on
        "Philips Power" <own_ir> (gIR)
        {mqtt=">[mosquitto:esp8266/02/sender/RC5/12:command:ON:56]", autoupdate="false"}
Switch   ir_philips_volp
        "Vol+"  <own_ir> (gIR)
        {mqtt=">[mosquitto:esp8266/02/sender/RC5/12:command:ON:1040]", autoupdate="false"}
Number ir_in_lg
        "LG IR command [%d]"    <own_ir> (gIR)
        {mqtt="<[mosquitto:esp8266/02/receiver/NEC/32:state:default]"}
Switch ir_adb_star
        "ADB 0" <own_ir) (gIR)
        {mqtt=">[mosquitto:esp8266/02/sender/sendGC:command:ON:38000,1,37,8,34,8,75,8,44,8,106,8,50,8,50,8,39,8,81,8,525,8,34,8,60,8,29,8,44,8,44,8,44,8,29,8,29,8,3058,8,34,8,75,8,44,8,106,8,50,8,50,8,39,8,81,8,525,8,34,8,101,8,70,8,44,8,44,8,44,8,29,8,29,8,3058]", autoupdate="false"}

• Using in rules:

rule lgTVturnInfoScreen
when
        Item ir_in_lg received update 551549190
then
        // Do somenting after button press
end

rule initIRmodule
when
        System started
then
        // Turn off Philips after system start
        postUpdate(ir_philips_on,OFF)

        // Switch LG TV to HDMI 1 by Global Cache code
        publish("mosquitto","esp8266/02/sender/sendGC","38000,1,69,343,172,21,22,21,22,21,65,21,22,21,22,21,22,21,22,21,22,21,65,21,65,21,22,21,65,21,65,21,65,21,65,21,65,21,22,21,65,21,65,21,65,21,22,21,22,21,65,21,65,21,65,21,22,21,22,21,22,21,65,21,65,21,22,21,22,21,1673,343,86,21,3732")
end