Add import active to energy reading

[jeroenst]

I have a shelly 3em flashed with tasmota but I only see the exported energy and the total energy.

I also need to see te imported energy to calculate the amount spend on buying electricity rather than only selling, can this be implemented?

[jeroenst]

My SDM120 has all these values available (1 phase):

Note: The SDM120 doesn't measure my solar power circuit so export energy is almost 0.

[jeroenst]

Is adding an delta > 0 for import energy at

Tasmota/tasmota/tasmota_xdrv_driver/xdrv_03_energy.ino

Line 282 in bed1417

if (delta < 0) { // Export energy

the right way to achieve this?

Like this:

      if (delta > 0) {     // Import energy
        Energy->kWhtoday_import[i] += (delta *-1);
        if (Energy->kWhtoday_import[i] > 100) {
          int32_t delta_import = Energy->kWhtoday_import[i] / 100;
          Energy->kWhtoday_import[i] -= (delta_import * 100);
          RtcSettings.energy_kWhimport_ph[i] += delta_import;
        }
      }

[jeroenst]

The original firmware does show import and export energy separately :

https://www.reddit.com/r/shellycloud/comments/1ay1wvh/shelly_3em_mqtt_topics/

[jeroenst]

[jeroenst]

This is all I need, but since I have flashed tasmota it would be difficult to go back to the original firmware. Beside that, the original firmware doesn't support mqtt tls.

[jeroenst]

@arendst can you tell me what I have to keep in mind if I want to make a PR for adding import active?
Does SetOption72 work for shelly 3em?

[jeroenst]

I think I have to add

    if (active_energy > 0) Energy->import_active[phase] += active_energy * 24576 / 3600;

to

Tasmota/tasmota/tasmota_xnrg_energy/xnrg_23_ade7880.ino

Line 560 in bed1417

Energy->kWhtoday_delta[phase] += active_energy * 24576 / 3600; // Using int32_t allows loads up to 87kW (0x7FFFFFFF / 24576)

in order to support SetOption72.

Is this the right way?

[jeroenst]

Currently testing the change. There is not much sun today so I have to wait until the sun energie exceeds our usage.

[jeroenst]

Unfortunately this change didn't work for option 72, energy total still counts down. 😔

[jeroenst]

Fixed in #22578

Energy Today, Energy Yesterday and Energy Total will only count import energy when setoption72 is enabled.

[jeroenst]

Fixed with 62e4bf1 with SetOption162 1

I will finish Testing when the sun shines again.