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I got MMDVM (V3F4 ) board from BI7JTA.
BUT it does not work on my setup.
Still I have very very strange problem.
73

Thanks for reply.
I use MMDVM (POG Ver1).
Of cause I checked and changed many parameter of Pi-Star dashboard Expert panel.
This problem occurred suddenly on bigging of July 2021 so I think some changes happens on YSF2DMR .

Hi All. Today I found very strange phenomenon below. 1) Pi-Star Ver 4.1.5 Dashboard 20210721 MMDVM on Pi3 connected to ID-880. 2) YSF and YSF2DMR mode on and connect to Parrot (YSF00001) 3) When I transmit form FT3D or FT2D dashboard shows all is fine. 4) I can not decode RF signal form Parrot on FT...

I finally succeeded! IZ8GUR checked his HEX file and told me it is completely OK. So I tried again again and MMDVM firm is now Radio2.jpg ========================================== Procedure is 1) Rpi ON and wget https://www.iz8gur.it/downloads/mmdvm_pog/mmdvm.hex 2) Rip OFF and set MMDVM board in B...

I could firm-up completely.
BUT MMDVM does not work.
Dashboard shows modem is BUT my MMDVM TCXO is 19.2MHz.
Whuuuuumm.

Thanks for your many message and suggestion.
Yes,This is very hard for me to firm-up my POG board.
I came to the time to give up.
Thanks again
73 de JA3VQW/Hiro

And after writing (even 56%) remove jumper of MMDVM board and power on Rip,
only PWR LED is lit on the MMDVM.
So I think I failed to write the firm of MMDVM.

I once tried and got ERROR.
When writing to MMDVM the LED of PWR stay lit and ACT is flashing fast.
And stopped at 56%.
It is very strange.

I put these script and it started writing to NNDVM BUT ============ cd MMDVM sudo pistar-watchdog.service stop sudo systemctl stop mmdvmhost.timer sudo systemctl stop mmdvmhost.service echo 21 > /sys/class/gpio/export echo out > /sys/class/gpio/gpio21/direction echo 20 > /sys/class/gpio/export echo ...

Hi I tried but got NEW ERROR below pi-star@pi-star(ro):MMDVM$ /usr/bin/stm32flash -v -w bin/mmdvm.elf -g 0x0 -R -i 20,-21,21:-20,21 /dev/ttyAMA0 stm32flash 0.5 http://stm32flash.sourceforge.net/ Using Parser : Raw BINARY Interface serial_posix: 57600 8E1 Cannot open file "/sys/class/gpio/gpio20...