espRFLinkMQTT

ESP8266 gateway between RFLink and MQTT server

This code allows to use an ESP8266 (ESP01, D1 mini, ...) to forward data from an RFLink board to an MQTT server.

The following capabilities were added:

Possbility to publish only a list of user ID to MQTT server
MQTT username, password and will topic
Adds a new unique field if a CMD field follows a SWITCH field (ex: "SWITCH02" = "ON" added to "SWITCH"="02", CMD="ON")
Hardware reset MEGA (RFLink) with ESP pin
HTTP server to show data received and how it is converted, with javascript functions to filter
Debug mode to publish on MQTT server with possibility to enable/disable
Uptime published on MQTT server every 5 minutes
OTA plus firmware update from webserver
Send commands from web interface with a predefined user list
Change easily serial interface to be used : hardware serial RX/TX, software serial on user defined pins, or a mix ; by default it listens to RFLink on RX and writes to software serial on GPIO2/D4
Handles negative values for fields TMP, WINCHL, WINTMP (not tested in real conditions so far)
Check data received is ASCII
Only publish on data change but still publish after a user defined period (a zero value means publish all the time)
Show setup information on web interface plus last received / published information for each user ID
Use of ESP Easy CSS for nice web interface

Setup:

RFLink-Hardware required (official or DIY)
Edit options in espRFLinkMQTT.ino : authorized IDS to forward to MQTT server, commands to show on web interface and serial configuration to use (hardware, software or a mix)
Edit options in Common.h for Wi-Fi and MQTT settings
Compile and upload
Wire serial as defined in serial configuration ; by default, wire ESP RX pin to RFLink TX pin, and ESP GPIO2/D4 pin to RFLINK RX pin
For hardware reset of MEGA (RFLink) from ESP, wire ESP pin defined by MEGA_RESET_PIN to MEGA RST pin ; by default, is uses GPIO/D3 pin
Subscribe to MQTT topic 'rflink/#'
Use web interface by pointing your http browser to ESP IP

When RFLink receives something this is presented on the serial line eg.:

20;2A;Xiron;ID=2801;TEMP=0043;HUM=29;BAT=OK;

This software published this to the topics:

rflink/Xiron-2801

as json like this:

{TEMP:"6.7",HUM:"29",BAT:"OK"};

Publish the command according to the documentation to the topic

rflink/cmd

e.g.

10;NewKaku;01dd77d5;1;OFF;

On the web interface main page, use the form or a predefined command button

Use it at your own risk!!!