Music enjoyment requires a comfortable environment. For example, room temperature needs to vary less than 1 degreeC. I have an ancillary project for that.
My condo unit has an integrated "Fan Coil" system for heating and cooling. This system is enclosed floor to ceiling in drywall. The thermostat is obsolete since it is switching 120vac while most thermostats now are low voltage for home owner installation. I attach a photo.
The thermostat has a corrugated disc filled with nitrogen. It expands as temperature rises, pushes a pin that clicks a switch behind the drywall that activates a relay to turn on the fan. It is the cheapest thing that could possibly work. But there is no setting that is consistently comfortable. It tends to turn on late and stay on too long. I call it shifting hysteresis.
The image includes a HS-422 servo and a generic ESP32. The ESP32 receives a on-off every second on it's PCB antenna. It presses or releases the disk. It is using WiFi hardware and ESPNOW protocol which does not compromise the WiFI credentials.
The remote in the second image has another ESP32 and a MCP9808 temperature sensor connected by I2C. Temperature is always within 25C +- 0.4 .. There is no adjustment knob or display since the settings rarely need to change.
That's it .. it works very well.
My condo unit has an integrated "Fan Coil" system for heating and cooling. This system is enclosed floor to ceiling in drywall. The thermostat is obsolete since it is switching 120vac while most thermostats now are low voltage for home owner installation. I attach a photo.
The thermostat has a corrugated disc filled with nitrogen. It expands as temperature rises, pushes a pin that clicks a switch behind the drywall that activates a relay to turn on the fan. It is the cheapest thing that could possibly work. But there is no setting that is consistently comfortable. It tends to turn on late and stay on too long. I call it shifting hysteresis.
The image includes a HS-422 servo and a generic ESP32. The ESP32 receives a on-off every second on it's PCB antenna. It presses or releases the disk. It is using WiFi hardware and ESPNOW protocol which does not compromise the WiFI credentials.
The remote in the second image has another ESP32 and a MCP9808 temperature sensor connected by I2C. Temperature is always within 25C +- 0.4 .. There is no adjustment knob or display since the settings rarely need to change.
That's it .. it works very well.
