This hardware installation guide assumes you already have a Panasonic CZ-TACG1 installed and want to replace it.
- Solder your ESP to your logic converter like this:
| ESP32 | Logic Converter | AC connector | Notes |
|---|---|---|---|
| 5V/VIN | VCC/HV | 5V | Provides the ESP32 with power from the AC, make sure to connect it to the high voltage side if your logic converter has one |
| 3.3V | VCC/LV | - | Connect the logic converter to 3.3V on the LV side |
| GND | GND | GND | Connect any ground from the ESP32 to the ground of the logic converter low voltage side |
| GPIO16 | LV1 | - | Connect GPIO16 to the first of your logic converter channels (Low voltage) |
| GPIO17 | LV2 | - | Connect GPIO17 to the second of your logic converter channels (Low voltage |
| - | HV1 | RX | Connect the first of your logic converter channels to the AC RX pin (High voltage) |
| - | HV2 | TX | Connect the second of your logic converter channels to the AX TX pin (High voltage) |
- Disconnect the AC mains supply
- Open up the front of your AC
- Open up the mains supply on the right to gain easier access to the CN-CNT connector
- Your wifi adapter should be located in a plastic slot or outside of your AC
- Remove the old wifi adapter and unplug it
- Solder 4 jumper cables to the CN-CNT wires (https://github.com/Egyras/HeishaMon#where-to-get-connectors)
- Note: RX/TX is from the direction of the ESP, not the AC.
- Heat shrink the individual wires (do not skip this step to avoid short ciruits)
- Connect the jumper cables to your logic converter
- Place the ESP and the logic converter in the slot for the wifi adapter (you can use some velcro to fix it in place)
- Plug in the ESP at the CN-CNT connector
Reconnect the AC mains supply. You can now connect this ESP to Home Assistant and control it from there.