Wireing MMDVM_HS_HAT_DUPLEX , orange pi zero ?

Help with the Orange Pi Zero
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oh5bzr
Posts: 22
Joined: Tue May 19, 2020 12:43 pm

Wireing MMDVM_HS_HAT_DUPLEX , orange pi zero ?

Post by oh5bzr » Mon Jun 08, 2020 7:14 am

Wireing MMDVM_HS_HAT_DUPLEX, 2018 v.1.0 , orange pi zero ?

Is there wireing diagram anywhere?

Or what pins pi orange zero image is useing and
should match MMDVM ?

While purhasing orange pi i did not relized
pin arragment is lot diffrent!!

I have only one connector connected and other
is not due orange-pi connector is very short.
I'am assuming that's needed only for updateing
mmdvm?


I get after power up:
-screen scrolling MMDVM
-it connect's to brandmeister and registres station as repeater (wanna have hotspo), and drops out
-it shows tcxo 14 and HS HAT 1.4.7 version ,.. so I assume pi-star talk's correctly to mmdvm
-CVS is blinking at MMDV
- nothing at log's if powered you can see dashboard http://oh5bzr.hamshack.info/pi-star/

73' de oh5bzr

This I know:
Pi-orange zero vs. rasbery pinouts: https://kaspars.net/blog/orange-pi-zero-gpio
I have mmdvm https://www.aliexpress.com/item/4000615 ... 4c4dJpYaR5

have tried:
-to find mmdvm schematic to solve out what pins realy needed
-some documentation is there difrences how pins are used pi-orange image !
Last edited by oh5bzr on Mon Jun 08, 2020 3:36 pm, edited 2 times in total.

G8SEZ
Posts: 139
Joined: Fri Apr 13, 2018 8:26 pm

Re: Wireing MMDVM_HS_HAT_DUPLEX , orange pi zero ?

Post by G8SEZ » Mon Jun 08, 2020 5:16 pm

https://github.com/mathisschmieder/MMDVM_HS_Hat

Simplex Hat.

https://github.com/phl0/MMDVM_HS_Dual_Hat

Dual Hat

There is a pdf file accessible from these pages with the schematic details.
--

Brian G8SEZ

oh5bzr
Posts: 22
Joined: Tue May 19, 2020 12:43 pm

Re: Wireing MMDVM_HS_HAT_DUPLEX , orange pi zero ?

Post by oh5bzr » Tue Jun 09, 2020 5:03 am

Thanks ! Based schematics only one hat interface header, whit pin 1, is needed to be connected, needed signals are TX RD SDC SDA,... so secconnector is useless ?

And it look's device is working,... have not radio here so can not test it yet but trafic is goining. Trx is blank and when signal heard it say's Listnening,...that's bit confuseing.

Thank's for schematic link, i realy tried to find but could not find from so many files !

73' de OH5BZR :shock:

G8SEZ
Posts: 139
Joined: Fri Apr 13, 2018 8:26 pm

Re: Wireing MMDVM_HS_HAT_DUPLEX , orange pi zero ?

Post by G8SEZ » Tue Jun 09, 2020 10:58 am

oh5bzr wrote:
Tue Jun 09, 2020 5:03 am
Thanks ! Based schematics only one hat interface header, whit pin 1, is needed to be connected, needed signals are TX RD SDC SDA,... so secconnector is useless ?

And it look's device is working,... have not radio here so can not test it yet but trafic is goining. Trx is blank and when signal heard it say's Listnening,...that's bit confuseing.

Thank's for schematic link, i realy tried to find but could not find from so many files !

73' de OH5BZR :shock:
https://github.com/mathisschmieder/MMDV ... hs-hat.pdf

https://github.com/phl0/MMDVM_HS_Dual_H ... al_hat.pdf

You need the pins on the second connector for flashing new firmware.
--

Brian G8SEZ

KE7FNS
Posts: 754
Joined: Wed Apr 17, 2019 11:11 pm

Re: Wireing MMDVM_HS_HAT_DUPLEX , orange pi zero ?

Post by KE7FNS » Tue Jun 09, 2020 7:54 pm

oh5bzr wrote:
Tue Jun 09, 2020 5:03 am
Thanks ! Based schematics only one hat interface header, whit pin 1, is needed to be connected, needed signals are TX RD SDC SDA,... so secconnector is useless ?
You don't need to have the second connector connected to anything for the hat to function correctly as a hotspot. The second connector has connections that are used for triggering the hat to go into bootloader mode so that it is ready to accept a flash.

If the hat circuit design was designed with jumpers you could manually force the bootloader mode and then flash it properly while still leaving those lines disconnected.

Another issue is the orange pi appears to have only a 26 pin header identical to the RPi 1 A/B. It is missing GPIO 20 and 21 so there isn't a corresponding GPIO 20 and 21 you could connect them to and get things to work without editing the scripts to an unused GPIO. Then every time there is an update you would have to modify the script again. Since firmware updates are not something that happens very frequently in my opinion it just isn't worth the time to bother with it connecting those lines.
All views, comments, posts and opinions shared are entirely my own.

oh5bzr
Posts: 22
Joined: Tue May 19, 2020 12:43 pm

Re: Wireing MMDVM_HS_HAT_DUPLEX , orange pi zero ?

Post by oh5bzr » Fri Jun 12, 2020 5:36 am

hi,

Thanks !!!

So far PI-star has been running. I'am waiting
radio so MMDVM radio is not tested yet!

joni

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