• Duplex hotspot board with ANTs ,Mini Repeater

Out of stock note:   

Because of the STM32 chip too expensive now ,  Duplex Hat  Temporary Out Of Stock now . Please consider the MMDVM repeater product  


User‘s Manual 

PDF Download https://www.bi7jta.org/files/UserManuals/

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


Support digital mode DMR  YSF|C4FM  P25  NXDN  DSTAR  POCSAG
Double timeslot in DMR mode, act as a mini Digital voice repeater.
Support VHF/UFH, frequency range: 144MHz-148MHz, 420MHz-475MHz,842MHz-950MHz,  Avoid satellite frequency:  145.8~146.0 MHz ,  435~438.000 MHz
High-quality ECS 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)

Including & components
1x PCB with complete soldering,
2x ANTs 5CM length,
1x 4PINs header connect to Nextion LCD

The default  antenna is black color with 5CM length, the silver Alloy Case use white color antenna. If you need other lengths, please leave me a message.

See the components for detail.

PAYMENT : Paypal offline

SHIPPING:  https://www.bi7jta.org/cart/index.php?route=product/product&product_id=51

Specs and Docs:
MCU: STM32F103C8T6
Transceiver IC: ADF7021,Programmable output power: -16dBm to +13dBm
TCXO: ECS 14.7456MHz,±2.5 ppm
HAT: 1.6mm thick, unleaded process


After sales and support:
BI7JTA@gmail.com  Facebook  Twitter IM

Product show:

With OLED 0.96' and 1.3' 

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With Nextion/TJC screen

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With Raspberry Pi 3B

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AlloyCaseAllComplete-RPi_3B & AlloyCaseAllComplete-RPi_4B2G

Vertical SMA interface and antenna (Must remark this reqiurement when your check out)


Wiki for Setting guide


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Duplex hotspot board with ANTs ,Mini Repeater

  • Brands NANO-Wireless
  • Product Code: DUPLEX_HS
  • Availability: 2-3 Days
  • $65.00

  • Ex Tax: $65.00

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