Control a Tasmota smart plug directly via the IR reader—turn it ON/OFF based on power surplus.

[Basti149]

I’m using an IR optical probe in my bungalow to monitor my electricity meter. When my balcony solar power system generates surplus energy, the power value becomes negative (indicating feed-in). I would like a second Tasmota smart plug to turn ON when the power reaches –200 W, and turn OFF again when it rises to –5 W (i.e., surplus drops below 5 W). Initially, I tried implementing this using Tasmota Rules—but unfortunately, Rules are not supported when SML/Scripting is enabled (which is required for the IR reader).
So I attempted to integrate the switching logic directly into the SML script, but that also didn’t work.
Here is the current script running on my IR reader:

B
=>sensor53 r
M 1
+1,3,s,16,9600,E320,1
1,77070100010800ff@1000,Consumption,kWh,E_in,3
1,77070100020800ff@1000,Feed-in,kWh,E_out,3
1,77070100100700ff@1,Current Power,W,Power,0
1,=h--
1,77070100600100ff@#,Server-ID,,Meter_Number,0

And I have compiled this directly into the Tasmota firmware.

#ifndef USE_SCRIPT
#define USE_SCRIPT
#endif
#ifndef USE_SML_M
#define USE_SML_M
#endif
#ifdef USE_RULES
#undef USE_RULES
#endif