DigiPi Hat don't PTT

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Jorge Forero

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Nov 23, 2025, 7:45:59 AMNov 23
to DigiPi
I check the DB9 from the Pi 4 and the Hat is receiving the Mic/PTT signal but not  the radio (RadioShack 212). The cable from the DB9 to the radio was checked too!
Please help.

Jorge VE3EAD 

Craig

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Nov 23, 2025, 10:49:42 AMNov 23
to Jorge Forero, DigiPi
Hi Jorge,

Is the little/short USB cable connected between the Pi4 and the DigiPi Hat?  it's not obvious, but it's required.

Does the orange LED blink on the DigiPi Hat when you try to transmit?

If you short the PTT wire from the radioshack to ground, does it go into PTT?


...and let us know, thanks,
-craig
KM6LYW
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Jorge Forero

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Dec 11, 2025, 10:34:55 PMDec 11
to Craig, DigiPi
Thanks for your answer Craig!
The usb cable is connected 
No led turn on or flashing when transmit 
Ground the pot wire radio transmit
Thanks

Jorge 

Craig

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Dec 12, 2025, 7:52:45 AM (14 days ago) Dec 12
to Jorge Forero, DigiPi
Hi Jorge, it's not looking good for the Hat, however, to be sure, can you
hook up everything, boot DigiPi, then turn [ON] the APRS Digipeater.

Exactly 8 seconds later watch for the LED flash on the board and
radio transmit.

Also, can you post the contents of "PktLog" here as well please?

thanks,
-craig
KM6LYW
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