I have a Winnow N7500, and initially I thought it could connect to the internet. However, I found that connecting wasn't as straightforward as I expected. It only supports one channel for remote access, which makes it inconvenient because I can't change it.
I had an idea to use an ESP32 to create a disguised microphone and connect it.
The card is at step one, I don't know the definition of the hand-microphone interface.😂
Does anyone know how to measure it, or how to determine it based on the circuit diagram?
Do I need to use an oscilloscope?
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