** If you choose Only_HAT item, it is not including Raspberry Pi , you can use Raspberry Pi ZeroW, 3B, 4B, or Windows PC.

** Highly recommended to buy an all-in-one device or the TF card with It's configured Pi-Star OS from me, otherwise you will possible meet many problems and need to deal with them yourself. 

My Aliexpress Store:   


** Including 10%~15% platform cost ,local country EU IOSS TAX(if your QTH in EU), 

** In addition, IOSS tax fees from EU countries will be charged.

** Germany Country duo to the EPR Policy, will not appear in AliExpress/Germany, please buy from my eBay, or directly here. ---- 2022.7.1

Buyers from EU countries please buy in my AliExpress store

If you from South America, Chile, Brazil, Argentina, Mexico,  buy in my AliExpress store

The EU including Austria, Belgium, Bulgaria, Hungary, Germany, Greece, Denmark, Ireland, Spain, Italy, Cyprus, Latvia, Lithuania, Luxembourg, Malta, Netherlands, Poland, Portugal, Romania, Slovakia, Slovenia, Finland, France, Croatia, Czech Republic, Sweden and Estonia.

If you from United Kingdom, USA,  or other countries, place the order in here directly.



Repeater and Simplex mode change anytime , through change the RX/TX board line order.
Support MMDVM mode DMR/YSF/P25/NXDN/DSTAR/POCSAG, Analog (Just work in some Motorola GM340 or GMxx serial)
Double timeslots in DMR mode, act as a mini Digital voice repeater.
Support VHF/UFH, frequency range:  depends on your external radio.
High-quality Fox924B 12MHz TCXO, stable with low BER.
Support Raspberry Pi 3B, 3B+, 3A, 4B, Pi ZERO(W), , Compatible with NanoPi NEO, Orange Pi, Compatible to BlueDV(Required to add USBtoTTL or Bluetooth model)
With USB interface ,can connect to Raspberry Pi and PC, inner PL2303 model.
Upgrade through ST-Link, USB, GPIO, continue upgrade support.

Including && components
1x PCB with complete soldering,
1x External radio connector cable  

Specs and Docs:
Power require: 5V2A
MCU: STM32F446x
TCXO: 12.0MHz ,FOX924
HAT: 1.6mm thick, unleaded process
Interface: MicroUSB, GPIO, DB9 female, 6 PinOut
Technical support: bi7jta@gmail.com , www.facebook.com/winters.cn

Microsoft Teams, TeamViewer, Facebook IM, Telegram, WhatsApp.

Payment : PayPal 

Setting guide


DIY project, not support  unconditional returns, please make sure you have enough patience to use this set of open source development kit, have question you can contact bi7jta@gmail.com ,I will use Remote desktop: Teamviewer, Microsoft Teams, help you make it work, if necessary.

Support Digital mode DMR/YSF/P25/NXDN/DSTAR/POCSAG/FM Analog


1) If you choose Only_HAT item, it is not including Raspberry Pi , you can use Raspberry Pi ZeroW, 3B, 4B, or Windows PC.

2) If you select MCS2000/TK8180/8185 DB25 cable , I will make a SIMPLEX cable link to one radio, you can soldering and use in DUPLEX two radios.

3) Please let me know your repeater radio you will link to this board , I will adjust the TXLevel for you , otherwise you need a RTL-SDR or spectrum analysizer,  I will help you by Microsoft Teams or Teamviewer.

The components I can provide , click the photo to view big image.

Facebook group https://www.facebook.com/groups/v3f446  (add me as IM friend query more information)

Youtube  https://www.youtube.com/wintershuang

Build up with higher performance components



DB9 interface,

4PIN header for Nextion .

With DB9 cable (option 0.5/0.75/1.0/1.5 Meter)

User cases:

Motorola GM338/GM340/CDM1250/CDM1550/CDM750/MCX760

Motorola MTR2000

Yaesu DR-1X (not work with DR-1XFR, DR-2X)

Yaesu FT-7800, FT-7900, FT-8900, iCOM-2720

Motorola GM300/M120

Motorola SM120, SM50

Motorola MCS2000

Tait repeater serial, HUAWEI E403, HUAWEI 450C

FC302 Data radio

Use SDR#(RTL-SDR) or Radio analylzer (such as CMU200) to view and adjust the TXLevel for you different repeater radio.

Use spectrum analyzer, eg. CMU200

SDRPlay + SDRuno adjust TXLevel

The board details,

Shipping components list

V3F4 Definition

1, Radio Data

Transmitter radio

Receiver radio

HB heartbeat


2, Nextion
5V <-> HAT 5V

V3F4 Cancel OLED interface, please follow Raspberry GPIO definition, and jump line yourself.

4, Potentiometer ( High-precision )
RX : Adjust RX level
RV2: Secondary adjustment, suggest keep default
TX : Adjust TX level
RSSI: extend

5, External LED
J7 : Connect external led
J8 : Open,GND for external LED

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Repeater board V3F4 with Cable , MMDVM

  • Brands NANO-Wireless
  • Product Code: Repeater_Kit_MMDVM
  • Availability: In Stock
  • $65.00

  • Ex Tax: $65.00

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