ESPHome-Froeling-Lambdatronic_3200
ESHome RS232 to TTL - ESP8266 - Read data from Froeling / Lambdatronic 3200
I'm testing this with my Fröling SP Dual. But I assume it should also work for other models which have the Lambdatronic 3200 control unit. Feedback appreciated.
Parts:
Wemos D1 Mini ESP8266: https://www.amazon.de/dp/product/B0CB85Q78G
MAX3232 DB9 RS232 TTL converter: https://www.amazon.de/gp/product/B0BNQ41QKQ
| Wemos | D7 | D8 | 5V | G |
|---|---|---|---|---|
| MAX3232 | RX | TX | VCC | GND |
Connect a RS232 (DB9) cable between "MAX3232 DB9 RS232 TTL converter" and you boilers mainboard (COM2).
Boiler Settings:
- Click on the user icon
- Enter code "-7"
- Boiler > Modbus Protokoll RTU(1)
- Boiler > use Modbus Protokoll 2014