- At the moment I’m still using the old heating system with fixed valves, the main switch of this package just commands the thermostat input of the boiler.
- Purchased several models of wireless thermometers - all failed due to various reasons. They are simply not reliable enough to be used in such a system. I still use Dallas DS18B20 sensors connected to ESP8266 in each room (mounted in Geeklink IR blasters doubling as IR controllers for other devices in the same room. Just moved from Tasmota to testing ESPHome on these). Also evaluating SHTC3 sensors which according to the datasheet have a precision of ±0.2°C @ -40°C to +125°C and humidity.
- Don’t know, as I don’t switch that much current through any of my relays.
In my newly built system I will use valves equipped with this kind of thermal actuators (normal open version, 24V):
The main relay board I will employ to control all the valve actuators in all the zones, will be a card like this one:
It communicates with ESPHome through MODBUS RTU protocol, has quality OMRON relays placed in sockets on the PCB.
I’m already testing ESPHome running on ESP32-POE-ISO:
Runs super-reliable with the above card (and a TTL-RS485 Serial Converter (MAX485) in between), I must say I’m impressed.