RPi3 A+ won't boot attached to MMDVM open-source head

Help with Raspberry Pi Foundation Boards (Raspberry Pi, Pi Zero, Pi Zero W, Pi A, Pi B, Pi B+, Pi2 B, Pi3 B, Pi 3 B+)
M1DNS
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Joined: Thu Apr 05, 2018 5:30 am

Re: RPi3 A+ won't boot attached to MMDVM open-source head

Post by M1DNS » Sat Mar 23, 2019 8:37 pm

You'll need to be running rels. 4.0 RC3 to work with the 3B+ & 3A+ model Pi's.
The earlier 3.4.* rels. won't work with those models.


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WB0NRE
Posts: 2
Joined: Tue Nov 27, 2018 6:59 pm

Re: RPi3 A+ won't boot attached to MMDVM open-source head

Post by WB0NRE » Tue Apr 09, 2019 2:59 pm

I can confirm that a PI 3 B+ will run V4.0.0 RC3 when it won't boot V3.4.17.

Now I can try hooking up the MMDVM_HS_HAT_DUPLEX v1.0.

73,
Rich
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G4NIS
Posts: 1
Joined: Sat Oct 12, 2019 8:07 pm

Re: RPi3 A+ won't boot attached to MMDVM open-source head

Post by G4NIS » Sat Nov 23, 2019 10:52 pm

I had same problem.
This board has a 3V3 regulator fed from the 5V rail, for some strange reason it feeds it's 3v3 back out to the 3v3 pin on the GPIO.
This cant be good for the 3V3.
I cut the skinny track feeding the 3V3 back to the GPIO pin, it now boots and makes some LEDS flash.

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