RP P4 8GB, DOES NOT WORK WITH DUPLEX MMDVM

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+)
G6WOV
Posts: 27
Joined: Thu May 13, 2021 12:47 pm

Re: RP P4 8GB, DOES NOT WORK WITH DUPLEX MMDVM

Post by G6WOV »

Thank you again.
I found this that might be useful to others too.
It shows the GPIO Pins for the Original 26 Pin Pi Boards, the revised 26 Pin Pi Boards, and the current 40 Pin Pi Boards. My son's original Pi Board has different GPIO on Pin 3 & Pin 5. So probably best if I leave his Pi alone.
But it is very interesting learning about all of this.
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IW8FAY
Posts: 13
Joined: Mon Sep 14, 2020 11:17 am

Re: RP P4 8GB, DOES NOT WORK WITH DUPLEX MMDVM

Post by IW8FAY »

Hi, I wanted to update you that I bought the PI3-B + and with the MMDVM DUPLEX it does the same thing to me, it doesn't connect !! I tried to upgrade SW to 4.1.5 but the FW can't. I read that you can try to update by shorting the JUMPER 1 above the MMDVM but I don't know what other PIN to short, maybe 38 or 40 ???? I have read that sometimes you have to unsolder or deactivate even the schemo oled from pistar .... thanks.
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G6WOV
Posts: 27
Joined: Thu May 13, 2021 12:47 pm

Re: RP P4 8GB, DOES NOT WORK WITH DUPLEX MMDVM

Post by G6WOV »

I have still yet to buy a radio to try this on, but I just tried an Update and it went through fine a moment ago. It did do a lot of updates and deleting. I was going to copy what it did to show all, but as I scrolled down the screen on my tablet to highlight and copy the Text I managed to do a Screen Refresh instead which in turn initiated another update. (My bad 🤨). But it appears to have worked OK on my Board and Pi 4, I have yet to try it with my son's Pi 3... Hopefully one of the Pi-Star Team can help you?
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IW8FAY
Posts: 13
Joined: Mon Sep 14, 2020 11:17 am

Re: RP P4 8GB, DOES NOT WORK WITH DUPLEX MMDVM

Post by IW8FAY »

Hi, SW installs, DOES NOT INSTALL FIRMWARE from SSH command, it gives me a modem error and does not connect !! Thank you.


even with the PI3-B + it works, bought the other day !!
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Last edited by IW8FAY on Thu Jun 24, 2021 2:53 pm, edited 4 times in total.
IW8FAY
Posts: 13
Joined: Mon Sep 14, 2020 11:17 am

Re: RP P4 8GB, DOES NOT WORK WITH DUPLEX MMDVM

Post by IW8FAY »

Yes good!! the version is 1.3, YES !!! Now I remove the display, thanks.
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G8SEZ
Posts: 553
Joined: Fri Apr 13, 2018 8:26 pm

Re: RP P4 8GB, DOES NOT WORK WITH DUPLEX MMDVM

Post by G8SEZ »

IW8FAY wrote: Thu Jun 24, 2021 8:02 am Hi, I wanted to update you that I bought the PI3-B + and with the MMDVM DUPLEX it does the same thing to me, it doesn't connect !! I tried to upgrade SW to 4.1.5 but the FW can't. I read that you can try to update by shorting the JUMPER 1 above the MMDVM but I don't know what other PIN to short, maybe 38 or 40 ???? I have read that sometimes you have to unsolder or deactivate even the schemo oled from pistar .... thanks.
You need to short the JP1 pads together inside the silk screen box. Leave this shorted permanently, it has no other purpose.

This allows the STM32 to go into bootloader mode and then to be flashed. Your flash update is failing for this reason.
--

Brian G8SEZ
IW8FAY
Posts: 13
Joined: Mon Sep 14, 2020 11:17 am

Re: RP P4 8GB, DOES NOT WORK WITH DUPLEX MMDVM

Post by IW8FAY »

No!! Non funziona!!!!
IW8FAY
Posts: 13
Joined: Mon Sep 14, 2020 11:17 am

Re: RP P4 8GB, DOES NOT WORK WITH DUPLEX MMDVM

Post by IW8FAY »

I know, but I have tried many of those solutions including yours but I do not come out ... once jumpered J1 with a solder I tried to update the modem .... but he does not take it !! Thanks anyway.
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G8SEZ
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Re: RP P4 8GB, DOES NOT WORK WITH DUPLEX MMDVM

Post by G8SEZ »

Possibly you have locked firmware meaning you need an ST-Link programmer to unlock it using the ST-Link connector.
--

Brian G8SEZ
IW8FAY
Posts: 13
Joined: Mon Sep 14, 2020 11:17 am

Re: RP P4 8GB, DOES NOT WORK WITH DUPLEX MMDVM

Post by IW8FAY »

Okay, thanks for the support, very kind !!!!
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