SendGet Unknown Command Error on ECR6600 Tuya WiFi Smart Plug Firmware 1.18.220

Hello.
Can somebody help with my problem?

"SendGet..." - Unknown command - on ECR6600 Tuya Wi-Fi Smart Plug with Energy Measurement.

My software version is 1.18.220

Welcome to forum. I think this is disabled on ECR by default. Still, no problem - you can enable and build it online, no toolchain required.
You need:

in obk_config.h in ECR section.
See our online building system for more information: https://www.elektroda.com/rtvforum/topic4033833.html

@p.kaczmarek2, thanks!

Now it (sendGET/POST) works! But I have another question.

1)
How can you manage channel states by receiving data from responses from a third-party HTTP server?
For example, I make request
and server sends an answer with raw (i.e. "Channel1=1&Channel2=0") or JSON (i.e. {"Channel1": "1"}), so how can I interpret server responses to change channel status on my device?

2)
How can I send some JSON data to third-party HTTP server?
For example, if I enter this in my browser http://192.168.1.95/cm?cmnd=Status 8 it returns some data in JSON:


How can I send this JSON data (POST or GET) to my server on URL https://mysite.com/openbkn_status/