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

Posted: Sat Jun 19, 2021 10:03 pm
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.

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

Posted: Thu Jun 24, 2021 8:02 am
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.

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

Posted: Thu Jun 24, 2021 8:46 am
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?

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

Posted: Thu Jun 24, 2021 9:07 am
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 !!

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

Posted: Thu Jun 24, 2021 2:15 pm
by IW8FAY
Yes good!! the version is 1.3, YES !!! Now I remove the display, thanks.

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

Posted: Thu Jun 24, 2021 5:15 pm
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.

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

Posted: Thu Jun 24, 2021 7:34 pm
by IW8FAY
No!! Non funziona!!!!

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

Posted: Mon Jun 28, 2021 8:33 am
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.

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

Posted: Mon Jun 28, 2021 3:54 pm
by G8SEZ
Possibly you have locked firmware meaning you need an ST-Link programmer to unlock it using the ST-Link connector.

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

Posted: Thu Jul 01, 2021 7:06 am
by IW8FAY
Okay, thanks for the support, very kind !!!!