Engineering Portable DMR HotSpot "pi-zero"
Engineering Base DMR Hotspot
"Raspberry pi model B + MMDVM modem + Motorola GM950
I was trying out the new RASPBERRY PI 3B+ but the raspberry doesn't give any boot whit MMDVM module. Detaching the module mmdvm the raspberry starts correctly
https://www.iz8gur.it/2018/11/17/rpi-3b-piu-veloce-ma-niente-pog-forse/
HW: Rasperry Pi B & DOLITY MMDVM Modem
- download .img and flash sd card V4 RC3 Pi-Star_RPi_V4.0.0-RC3_20-Jan-2019.zip
- plug MMDVM module on Raspberry
- power on raspberry attemp 2min and connect via browser on url http://pi-star/local
considering the default accesses (username: pi-star & psw: raspberry)
RADIO TOP details connector
http://www.batlabs.com/gm350.html
GM350/GM600/GM950/MCX600
|
Pin |
Name |
Type |
|
1 |
SPKR- |
Analog O/P |
|
2 |
Ext. Mic Audio |
Analog I/P |
|
3 |
GP1 |
Digital I/P |
|
4 |
GP2 |
Digital O/P |
|
5 |
Flat TX Audio |
Analog I/P |
|
6 |
BUS+ |
Digital I/O |
|
7 |
GND |
Ground |
|
8 |
GP3 |
Digital O/P |
|
9 |
GP4 |
Digital I/P |
|
10 |
Ignition Sense |
Digital I/P |
|
11 |
RX Audio |
Analog O/P |
|
12 |
GP5 |
Digital I/O |
|
13* |
SW B+ Sense |
Analog O/P |
|
14 |
Hook |
Digital I/P |
|
15 |
RSSI |
Analog O/P |
|
16 |
SPKR+ |
Analog O/P |
I connected the mmdvm module with the motorola like this table:
|
MOTOROLA GM950 - PIN |
MMDVM – Digital Modem Multi-Mode - PIN |
|
3 |
3 |
|
5 |
5 |
|
7 |
9 |
|
8 |
1 |
|
11 |
6 |
