Smart Meter Interface (Iskra MT 174)

[kk98kk]

In advance I am new to working with microcontroller and Tasmota, so please be patient with me.
I have an ESP32 and want to use the Smart Interface from Tasmota to send the energy data via MQTT to Home Assistant. My energy meter is an "Iskra MT 174". I added the following code in the user_config_override.h-file as you see in the picture.

In the platform_override.ini-file I only changed the device from tasmota to tasmota32 and used the right upload port.
After a successful build and upload to my ESP32, I could connect to my WiFi. I let the modul configuration for the GPIO-pins on "NONE" and added under Console->Edit Script following things:

Now it looks like this, but I get no data and I don't know why.

My Output from the consol looks like this:

For test purpose I used my PI and used the following code and got this results:

I am using the Version 12.5.0 from Tasmota

Originally posted by @kk98kk in #18721

[Noschvie]

Have you tried to swap RX / TX ? Or check the coinnection using the SML debug mode (sensor53 dm = sets dump mode for meter m (1...N), must be set to 0 for normal operation)

[kk98kk]

Thank you for information to write in the console: sensor53 d1. I got the right values. After I changed script from

>D
>B
->sensor53 r
>M 1
+1,3,o,0,300,STROM,1,100,2F3F210D0A
1,1-0:1.8.1*255(@1,Total Consumed,KWh,Total_in,3
1,1-0:2.8.1*255(@1,Total Delivered,KWh,Total_out,3
1,1-0:0.0.0*255(@#),Meter Number,,Meter_number,0
#

to this:

>D
>B
->sensor53 r
>M 1
+1,3,o,0,300,STROM,1,100,2F3F210D0A
1,1-0:1.8.0*255(@1,Total Consumed,KWh,Total_in,3
1,1-0:2.8.0*255(@1,Total Delivered,KWh,Total_out,3
1,1-0:16.7.0*255(@1,Current Consumption,KWh,Power_cur,3
1,0-0:C.1.0*255(@#),Meter Number,,Meter_number,0
#

it worked perfect for me.
I don´t know if only my Iskra MT174 has this protocoll or everyone. It could also be wrong in the documentation for the Iskra MT174.

[Jason2866]

Looking in the docs, there is a script for the MT-175. It has different serial speed and GPIOs are different.

>D
>B
->sensor53 r
>M 1
+1,3,s,16,9600,MT175
1,77070100010800ff@1000,E_in,kWh,E_in,1
1,77070100020800ff@1000,E_out,kWh,E_out,1
1,77070100100700ff@1,P,W,P,18
1,77070100240700ff@1,L1,W,L1,18
1,77070100380700ff@1,L2,W,L2,18
1,770701004C0700ff@1,L3,W,L3,18
1,77070100000009ff@#,Server_ID,,Server_ID,0
#

Maybe you try with this settings.

[kk98kk]

I tried it without success.

[nyunity]

Hi all, hi @kk98kk,

I tried your config and work, it shows the right total consumed. But the current consuption is empty. Did you change any other configs?

Happy to hear from you soon.

[kk98kk]

No. It worked without a PIN.

[nyunity]

damn, can you tell me where I can find these reference numbers? and, did you change the config to module type generic 18 or default Sonoff Basic (1)?

[kk98kk]

I don´t have that Smart Meter anymore, but from pictures from the internet it should be right there:

I don´t know what you mean by that. My config module looks like this:

[nyunity]

okay, i think i crashed my hichii. I upgrade my fw ti 12.5.0 and now I am not able no edit config anymore..

[hagenbuch]

If you still are able to access the Hichi, you should just be able to upload a correct firmware (from Hichi..)