.gitignore

@@ -0,0 +1 @@
+.vscode

README.md

@@ -1,8 +1,9 @@
 # ESPHome-Froeling-Lambdatronic_3200
-ESHome RS232 to TTL - ESP8266 - Read data from 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:
+#### Parts:
 Wemos D1 Mini ESP8266:
 https://www.amazon.de/dp/product/B0CB85Q78G
 
@@ -14,3 +15,11 @@ 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