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nakhonthai / ESP32IGate

ESP32IGate is a APRS Internet Gateway + TNC Built In that is implemented for Espressif ESP32 processor.
http://aprs.dprns.com
GNU General Public License v3.0
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Decoding level info on esp32 #7

Open f4goh opened 6 months ago

f4goh commented 6 months ago

Hello, I have the simple circuit connected to a yaesu Ft-7900 on data packet din 6. the fsk signal on GPIO36 VP are 50mVpp. It seems too low. When i put the speaker output, that's works. What is the minimum level in Gpio36 to decode FSK ? the txing are working well. 73

nakhonthai commented 6 months ago

You can see ADC Attenuation. Mininum 0dB at 100mV-950mV(50mVpp-457mVpp) and DC Offset at 950mV/2 (Vdc at GPIO36) image