if the board fails to work on duplex mode, please run the upgrade command: sudo pistar-mmdvmhshatflash hs_dual_hat ;
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.
EASY OPERATION: The firmware is pre-loaded and is easily upgraded via software. Onboard LEDs showing status (Tx,Rx,PTT,Mode)
WORK with RASBERRY Pi: Mounts cleanly on current Raspberry Pi including the Pi Zero , NOT compatible with Rasberry Pi 4. FREQUENCY: UHF 433-900MHz, VHF 144-220 MHz. NOTE: TX =0, RX=0. Modem select: STM32_HS_GPIO
