This plugin intends to parse the serial communication as provided by an OpenTherm Gateway (OTGW). The OTGW project can be found here: https://otgw.tclcode.com/
The main entity is the climate integration which allows viewing and controlling of the room setpoint.
For other sensors, only a subset of OTGW messages are parsed. New sensors can be added fairly easily by modifying otgw/sensor/__init__.py. Feel free to make a pull-request.
uart:
# Serial for OTGW PIC
- id: uart_otgw
baud_rate: 9600
tx_pin: GPIO1
rx_pin: GPIO3
data_bits: 8
parity: NONE
stop_bits: 1
otgw:
uart_id: uart_otgw
climate:
- platform: otgw
room_thermostat:
name: Thermostat
sensor:
- platform: otgw
room_setpoint:
name: Room Setpoint
central_heating_water_pressure:
name: Central Heating Water Pressure
room_temperature:
name: Room Temperature
boiler_water_temperature:
name: Boiler Water Temperature
burner_operation_hours:
name: Burner Operation Hours
burner_starts:
name: Burner Starts
binary_sensor:
- platform: otgw
fault_indication:
name: Fault Indication
ch_active:
name: Central Heating State
dhw_active:
name: Domestic Hot Water State
flame_status:
name: Flame Status
text_sensor:
- platform: otgw
version:
name: OTGW versionOptional additional configuration to ensure a reset of the OTGW PIC when ESPHome is reloaded:
esphome:
# ...other config options...
on_boot:
# Reset the OTGW PIC
# This ensures the debug output of the esp on the serial output does not confuse the PIC
priority: 600
then:
- output.turn_off: pic_reset_n
- delay: 100ms
- output.turn_on: pic_reset_n
output:
# Reset line of the OTGW PIC
- platform: gpio
pin:
number: GPIO14
mode:
output: true
open_drain: true
id: pic_reset_n