Eqiva Tasmota Integration

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JSAnyone

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Nov 22, 2021, 1:50:49 PM11/22/21
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Hi all,
I recently came across the cheap Tasmota Thermostats (10€ per Thermostat):
https://www.amazon.de/Eqiva-Elektronik-Heizkörperthermostat-Boost-Funktion-leisem-Kompaktgetriebe/dp/B08425MNSG/ref=sr_1_2?__mk_de_DE=ÅMÅŽÕÑ&keywords=eqivA&qid=1637605150&sr=8-2
On Ebay they are even cheaper.
Some people „hacked“ them with an ESP8266 in order to make this cheap thermostats smart. The ESP is just emulating the impulses from the rotary encoder of the thermostat.
I wondered If somebody is interested in integrating this into Tasmota. I have thought about the following aspects:
- ESP controls the Thermostat with emulating impulses. Before applying a new temperature the thermostat is always set to 0 to avoid inaccuracies after some time
- Impulses of the rotary encoder are transferred to the ESP so that you can still use it to change the temperature over the ESP

Here are some links to read more about how it can be used (unfortunately all i found was German):

What do you think?

Fernando

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Dec 7, 2021, 11:03:19 AM12/7/21
to TasmotaUsers
mmm.. I don't think that is the best solution.

For a bit more you have the bluetooth model from equiva that can be controlled using blutooth (BLE).

You can use one device with tasmota BLE in a ESP32 device to transmit messages to the devices of a wide zone were you have several radiators installed, with just one IP address.

In this case tasmota  does not control the device or send 1 or 0 to open or close the valve.
It is just a gateway interface between BLE (bluetooth) and WIFI, it just exposes BLE messages as MQTT topics (I think it works over http too) in the wifi network.

Valve electronics are the ones that control the device and is not altered at all, you use tasmota just to reach them from you pc or controller in a IP network.

And you just have to buy and install one ESP32.

Modifiying and interacting directly with the device is more error prone, and you have to buy the electronics for the tasmota/esp8266 devices and build the boards... at the end it will cost you the same or more than buying the BLE version of eqiva.

Besides, wifi consumes much more power than BLE so you will have to replace more often the batteries and you need batteries for the esp8266 and the valve. Too much batteries to take care of.
That is one of the reasons (price the other) that decided me to test a BLE radiator valve over other solutions.

Regards
Fernando

Philip Knowles

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Dec 7, 2021, 11:06:28 AM12/7/21
to Fernando, TasmotaUsers

I’ve moved from BLE to ZigBee but the EQ BLE TRYs can be controlled by Open MQTT Gateway with an ESP32 or ESP8266 with an HM10

 

Regards

 

Phil K

 

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Fernando Ariznavarreta Fdez.

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Dec 8, 2021, 5:06:40 AM12/8/21
to Philip Knowles, TasmotaUsers
Thanks I will have a look at openmqtt gateway.

But it is only a specialized gateway, it seems great, but no sensors or other whistles.  I would need separate devices for sensors, two for gateways with openmqtt and two at least with tasmota for sensors one of them with the relay control.

If I cannot integrate ble and sensors in a single tasmota esp32 device, it would be a better solution to use openmqttgateway for ble or zugbee integration.

But lets see uf i can do it with a single rasmota and wether tasmota ble is enough for the needs 

Nobody can help about which are the appropiate compiling defs to get ble, sensors and homeasstistant autodiscovery working?

Un saludo
Fernando

Philip Knowles

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Dec 8, 2021, 5:15:07 AM12/8/21
to Fernando Ariznavarreta Fdez., TasmotaUsers

Open MQTT Gateway will control multiple TRVs (if they are in range). In my house it wasn’t practical to have the ESP32 where the pump was so I used a Shelly1 to control the pump,

 

Regards

 

Phil K

 

Sent from Mail for Windows

 

Fernando

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Dec 8, 2021, 9:05:06 AM12/8/21
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Well, I have been investigating a bit more about openmqtt.

It seems you can even connect a BME280 and control digital outputs to connect a relay to them, and publisht and change state through MQTT.
But it seems that the offtheshelf firmwares for esp32 DEVKIT (I suppose espe32dev-ble and esp32dev-ble-cont) do not support sensors or actuators.

I could not find the list of available firmware and what do they have activated. I could not find too much info about compiling it from source (not so easy usually in windows).

I have tried esp32dev-ble and I can configure it and see the MQTT messages. 
It detects several BLE devices, The EQ3 valve among them.
But It does not pusblish any information about the valve state, just the name, and RSSI.
Not very useful as it is. 

In documentation BLE devices are supposed to publish all info in json format.

How can I configure it?

Philip Knowles

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Dec 8, 2021, 9:37:19 AM12/8/21
to Fernando, TasmotaUsers
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