Description:

High quality material: hotspots Board Kit is made of metal,durable and practical.
Compatibility: hotspots Board Kit for P25 DMR YSF, for power Bank; hotspots Board Kit only for Mini Duplex board
Setup: hotspots Board Kit hardwares (rpi 0-3) New pi4b needs to remove Right Socket ;general configuration for MMDVM_DUPLEX
Set Controller Mode: Duplex repeaters or Simple
Radio frequency: Freq: 144-148, 219-225, (main frequency band) 420-475, 842-950

Specification:

Duplex Mode: Example: RX: 145.000000 TX: 433.000000
Simple Mode: Example: RX:438.000000 TX:438.000000
Radio/electronic equipment Type: -DVM/MMDVM_HS Hat(GPIO) or any other (GPIO board)
Options: (not needed, some old boards need to be set)
Admin->Expert->editing MMDVMHOST->RXOFFSET=0 TXOFFSET=0 (default in )
(Update: 2019/2 new 3225 so offset is 0 )
Update new firm: (Expert / ssh access / user:pass:)
sudo mmdvmhshat flash hs_dual_hat
The default bit error rate is less than 5%, and the default offset is 0. If the bit error rate is greater than 5%, as long as the signal can be received, it can be corrected by offset.

Size Chart:

7cmx4cmx1cm/2.76inchx1.57inchx0.39inch

Package Includes:

1 hotspots board
2 accessories

Note:

Please allow slightly errors due to manual measurement and different monitors.