OpenTherm Thermostat firmware v1.10
A new v1.10 is ready to update.
New features
-
MQTT state extended
- BLE sensor data
- Return water temperature
- MQTT TLS Support
- Unique MQTT Topics
- Maximum relative modulation level set via MQTT
- Display brightness, dim and off settings (for v2)
Bugfixes
- MQTT sensor 'last seen' invalid calculation
- BLE sensor packet loss ratio calculation (invalid after sensor type change)
- Reading OT float type for negative values (for external temperature)
MQTT thermostat state message was extended with a following properties:
chMin // CH minimum temperature, °C
chMax // CH maximum temperature, °C
bleBatt // BLE sensor battery, mV
bleBattLevel // BLE sensor battery, %
bleHumidity // relative humidity, %
blePacketLossRatio // packet loss ratio, %
bleRssi // BLE signal strength, dBi
bleLastSeen // time since last BLE packet was received, seconds
An Unique MQTT Topics enables possibility of using a multiple thermostats within the same MQTT Broker by
changing the topics to use device's MAC address, i.e.
diyless_thermostat/stat/things/thermostat/properties
becomes
diyless_thermostat_ABCDEF123456/stat/things/thermostat/properties
A BLE loss ratio and/or BLE RSSI indicators can be used to estimate a connection quality between the thermostat and a sensor.
Poor signal quality might result in either frequent boiler start/stops or inefficient heating if the option 'Heat on sensor failure' is used.
In case of a large distance between sensor and thermostat you might consider either switching to an OpenTherm Thermostat 2
(it is ESP32-S3 based and has better BLE sensitivity) or using a BLE Repeater (i.e. simple ESP32-based repeater, can be also flashed to S3 variant).
