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Communicate with Viessmann boilers using the optolink for ESP8266 and ESP32

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Hey @bertmelis my heat pump has some data points with 3 bytes. For example temperatures. Address 0101 is the outside temperature on 2 bytes. Address 01C1 is the outside temperature...

### Installation specifics * **Heating type:** Vitocal 200-s with WO1C * **Protocol:** KW or P300 both work * **Board:** ESP8266 NodeMCU and ESP32 NodeMCU ### Symptom Hey. With the Example...

### Installation specifics ESP8266 + Vitotronic200 + Vitocal300 ### Symptom What happens? (crash, unresponsive, nothing at all...) I cannot communicate with the heater when I use a wrong DP address....

### a) device type 2 bytes. Currently using COUNTS as the only 2-byte datatype available: ``` READ 4105000100f80200 ack RCV 4107010100f80220496c ack DP Gerätekennung succes boiler-Gerätekennung:18720 ``` result is 18720...

Following the pictures of the real world build, it seems that RX is connected with 3.3V over that 10k ohm resistor but in this diagram it seems the transistor has...

Hello I have a vitodens 100 wb1. I have the "Bauanleitung-ESP8266" + esp-link and vitocontold (I also tried with python script which are also working for low level read). I...

Hi Bert, I want to control my Viessmann Vitodens 200 with Loxone. But there is no ready hardware and software. I have done many projects on NodeMCUs oder Arduinos. Is...

### Installation specifics * **Protocol:** KW * **Board:** ESP8266 as well as ESP32, both adafruit feather ### Symptom Values are not read correctly. It sometimes workes nicely but degrades suddenly....

Hello I have experienced your vitoWifi library on ESP8266nodeMCU and a Vitobens 222W and the protocol P300 works well Nevertheless if a mistake happens on the connection the system doesn't...

### Installation specifics * **Heating type:** Vitodens 200 i think * **Protocol:** unknown * **Board:** nothing yet * **Hardware:** Viessmann 222f boiler. We have the above unit and I understand...