Okay, besides the talk about the frequency of sending my data, the problem with the ESP32 Board is still not solved. I measured again, because I found out, that I forgot to measure with the oszi against ground… it is looking like this now:
The time with the voltage of 198.01mV over 720ms is representing the time the LoRa module is on. Why is this not equal to the time on air/sending time? I am only switching it on for sending and turning it of after it.