What about KW2 ? #152

I might be easier to find an ESP with USB support than to build a diy optolink that fits nicely into your heater.

While I do have some suitable leds/optotransistors, you still need to craft something so they align with the interface. I've had mixed results with that. So now I rely on the USB version. It might seem overkill but reliability has its price.

Aliexpress was quicker than expected. Just received some ESP32 S3 WiFi BT Modules with USB OTG (no Mini but the 44 Pin Dev Board)

I downloaded your package from https://github.com/bertmelis/HeatingMonitor and already amended the content of the config.h

Do I assume correctly that I need using PlatformIO for building and deploying to the board? (Didn't use PlatformIO often)

It shouldn't matter, but the CI system uses platformio. So that should definitely work.

I want to have it universal though.

Thanks so much for taking care of me :-)

In between I got it compiled and uploaded to the ESP32 S3 using VSCode PlatformIO Extension

I can see the WebPage of the ESP for uploading Firmwares and I can see some Messages arriving in the MQTT Broker.
So most of the job seems do be done.

I guess I now need some time for amending the Datatpoints of my old Vitotronic.
Actually I only know a few like Outside Temp, Boiler Temp, Water Temp and two Target Temp Values. But up to now this was sufficient.

shit ... english :-)

I guess I adapted the main as good as I understood. However I assume I have to ammend the cases as well, correct?

One problem remains: at Address 0x2301 I can read the current mode (H+WW / WW / OFF ) , but can I also set another
mode? Currently if no heat is required, my script sends the command to switch the vitotronic off
So something like sending a command via MQTT vitocontrol/mode/set "OFF"

VG
Ralf

`#include <Arduino.h>

#include <VitoWiFi.h>
#include <USBHostSerial.h>
#include "EspConnect.h"

VitoWiFi::Datapoint datapoints[] = {
VitoWiFi::Datapoint("outsidetemp", 0x0800, 2, VitoWiFi::div10),
VitoWiFi::Datapoint("boilertemp", 0x0802, 2, VitoWiFi::div10),
VitoWiFi::Datapoint("boilertarget", 0x5502, 2, VitoWiFi::div10),
VitoWiFi::Datapoint("watertarget", 0x6300, 2, VitoWiFi::div10),
VitoWiFi::Datapoint("watertemp", 0x0804, 2, VitoWiFi::div10),
VitoWiFi::Datapoint("mode", 0x2301, 4, VitoWiFi::noconv),
//VitoWiFi::Datapoint("solarcollectortemp", 0x6564, 2, VitoWiFi::div10),
//VitoWiFi::Datapoint("solarcylindertemp", 0x6566, 2, VitoWiFi::div10),
//VitoWiFi::Datapoint("solarpump", 0x6552, 1, VitoWiFi::noconv)
};
uint8_t numberOfDatapoints = 6;

uint8_t setupStep = 0;
bool setupSession() {
switch (setupStep) {
case 0: {
HassDiscovery::Sensor device(DEVICEID, DEVICENAME);
device.json()[HADISCOVERY_UNIT_OF_MEASUREMENT] = "°c";
device.json()[HADISCOVERY_ICON] = "mdi:water-boiler";
if (!device.create("boilertemp", "Boiler Temperature") ||
!EspConnect::mqttClient.publish(device.topic(), 1, true, device.payload())) {
return false;
}
++setupStep;
[[fallthrough]];
}
case 1: {
HassDiscovery::Sensor device(DEVICEID, DEVICENAME);`