C4FM Dstar P25 MMDVM Digital Relay Board DMR Supports for Raspberry Pi 4B

C4FM Dstar P25 MMDVM Digital Relay Board DMR Supports for Raspberry Pi 4B

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$120.30

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Product Description

List of verified vehicles:

GM300/M120 (older machine)

GM3188/3688/GM338 (recommended)

CDM1250/CDM750 (more assembled goods, average effect)

SM120/SM50 (special interface)

950x (with a certain failure rate)

DMR cart series XPR4550, M8268,

FT series 7800 7900 8900, ICOM 2720, (suitable for simple work, simple)

DR-1X (simple, recommended)

MTR2000 (a bit complicated, need to write frequency as required, import configuration, patience)

Huawei E403-50B (To change the fuselage circuit flying line, make the connector, the complexity is the highest, not recommended, you can find a HAM friend for paid adjustment)

Huawei 450C (not supported by the test)

Information update:

2019-12-10 The relay board can only be used with the Raspberry Pi. The single board cannot be used directly. Of course, it can be connected to the computer through the USB serial port, but it is an in-depth method of use. The MMDVM for PC program is not perfect. At present, only command-line programs in DMR mode have been compiled. If you have programming skills, you can try the computer command-line method. The computer BlueDV program can drive the relay board, but it can only work in the simplex direct frequency mode, and cannot realize the relay mode. Therefore, Raspberry Pi is the easiest and quickest way to play.

Environmental support:

Raspberry Pi 3B/3B+/4B, NanoPi, OrangePi, Windows OS, BlueDV

Limitation factor:

The GPIO of Orange Pi is special and requires a jumper. Windows only provides DMR mode, BlueDV only supports simplex direct frequency mode, and the latest image of Raspberry Pi 4B supports GPIO link.

System solution:

Solution 1, the simplest: relay board + Raspberry Pi, ready-made mature MMDVM system, directly swipe the system card

Solution 2, more complicated: relay board + USB data cable + Windows 7 system, imperfect MMDVM compiler program, only supports DMR mode, other modes need to be compiled by themselves

Solution 3, imperfect: relay board + USB data cable + Windows BlueDV, only supports simplex mode, does not support difference frequency mode

Package includes:

1 x Relay board kit

More Detailed Photos:

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