A Homie MQTT bridge for the Xiaomi Mijia 2 hygrometer-thermometer. This repo also serves as the monorepo for a handful of helper crates related to Homie and Bluetooth.
Homie based firmware for Sonoff Basic, Sonoff S20 wifi relay or any ESP8266 based relay.
Features:
ON/OFF relay
Timer based relay
Configurable default (on boot) relay state - (MQTT independent)
Local button on/off
Keepalive feature - device will reboot if not receive keepalive message in given time
Reverse mode - ON command means relay off, OFF command means relay on (configurable on Homie level)
Watchdog timer
All Homie buildin features (OTA,configuration)
Build and upload
Attache module via USB-RS232 adapter
Set proper serial port number in plantformio.ini file (upload_port variable) if required
reboot module into program mode
Flash module:
execute pio run --target upload --environment sonoff for SONOFF, pio run --target upload --environment sonoffs20 for SONOFF S20 or pio run --target upload --environment generic for generic ESP8266
In Atom editor with PlatformIO prees F7 enter environment name (sonoff or generic) and choose PIO uload option from the list
MQTT messages
Property
Message format
Direction
Description
_HOMIE_PREFIX_/_node-id_/relay01/relayState
(ON|OFF)
Device → Controller
Current state of relay
_HOMIE_PREFIX_/_node-id_/relay01/relayState/set
(ON|OFF)
Controller → Device
Change relay state
_HOMIE_PREFIX_/_node-id_/relay01/relayTimer/set
\d+
Controller → Device
Turn on relay for specific no. of seconds
_HOMIE_PREFIX_/_node-id_/watchdog/timeOut/set
\d+
Controller → Device
Time after witch watchdog disable/enable output fo 10s
_HOMIE_PREFIX_/_node-id_/watchdog/tick/set
\d+
Controller → Device
Tick for watchdog - renew timeout of reset
_HOMIE_PREFIX_/_node-id_/keepalive/timeOut
\d+
Device → Controller
Report of keepalive timeout value (seconds), 0 - keep alive feature is not active
_HOMIE_PREFIX_/_node-id_/keepalive/timeOut/set
\d+
Controller → Device
Set Report of keepalive timeout in seconds, 0 - keep alive feature is not active
_HOMIE_PREFIX_/_node-id_/keepalive/tick/set
.*
Controller → Device
Keepalive message from controller to gateway - if device will not receive during keepAliveTimeOut time slot, it will reboot, keepalive is not active when keepAliveTimeOut is equal 0
_HOMIE_PREFIX_/_node-id_/$online
(true|false)
Device → Controller
/true when the device is online, false when the device is offline (through LWT)
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