MMDVM Duplex Hotspot Module Dual Hat V1.5.2 Support P25 DMR YSF NXDN DMR Slot 1 + Slot 2 for Raspberry pi with USB Port (without OLED)

Original cystal : Original ECS-TXO-3225-147.4-TR from USA Duplex variant of MMDVM_ HS_Hat This PCB uses the MMDVM_HS .

It has two ADF7021 onboard and allows for duplex operation with two time slots on DMR.

Setting Tips: Modem select: STM32-DVM/MMDVM_HS-Raspberry pi Hat(GPIO) Package List: 1x MMDVM duplex HotSPOT Module 2x Antenna Features & details Features WIDELY COMPATIBLE: Supports DMR, P-25, D-Star and System Fusion.

HIGH PERFORMACE: 32-bit ARM processor, up to 10mW RF power, fully tested every piece.

If the board fails to work on duplex mode, please run the upgrade command: sudo pistar-mmdvmhshatflash hs_dual_hat .

(if this command doesn't work, please try this command: mmdvm.club/index.php/wpsd.html) The MMDVM Duplex Hotspot board is latest firmware V1.5.2.

How to update firmware: (pi-star / expert / ssh access / user : pi-star pass:raspberry) then run sudo pistar-mmdvmhshatflash hs_dual_hat set Jumper BOOT0=1,BOOT1=0 and soler JP1 First! After upgraded finished, disconnect JP1 .

FREQUENCY: Radio Frequency : Freq:144-148,219-225, (Main Band) 420-475,842-950 NOTE: TX =0, RX=0.