MMDVM HS Dual Hat Duplex Rev 1.2

1. MMDVM HS Dual Hat Duplex Rev 1.2
2. Purchased MMDVM Duplex Hat
3. eBay Order
4. Installing or Updating Firmware
5. Running the Duplex Board in Simplex Mode

1. Any-Tone-AT-D868/Anytone-AT-D868.html
2. Radioddity OpenGD77
3. MMDVM-Mutli-Mode-Digital-Voice-Modem
4. Digital-Modes/Pi-Star/Pi-Star.html
5. Digital Mobile Radio (DMR)

MMDVM HS Dual Hat Duplex Rev 1.2

• This PCB uses the MMDVM_HS.
• It has two ADF7021 onboard and allows for duplex operation with two time slots on DMR.
• High performance 32-bit ARM processor
• Supports DMR, P-25,D-Star and System Fusion
• Onboard LEDs to show status (Tx,Rx,PTT,Mode)
• Up to 10mW RF power
• SMA antenna connector,Antenna included
• Mounts cleanly on all current Raspberry Pi's including the Pi Zero
• The firmware is pre-loaded and is easily upgraded via software.
• Open source 3D printable case available
• UHF 430-450 MHz,433mhz and 900MHz
• VHF 144 220 Opera FREQ
• The upper part is TX,the lower is RX antenna.
• UHF+VHF
• include two SMA antennas
• Modem select:STM32_HS_GPIO
• Set TX frequency,RX frequency
• TX,RX frequency had better 10M or more apart.
• SLOT1,SLOT2 support../../.
• size:70*60*20mm

Purchased MMDVM Duplex Hat

• Product type: Duplex MMDVM Hotspot
• Material: Metal, ABS
• Processor: 32-digit ARM professor
• RF power: 10mW
• Package size: approx. 10 * 6 * 2 cm/ 3.9 * 2.4 * 0.8 in
• Package weight: 34g/ 1.2oz
• Two Antennas

eBay Order

Installing or Updating Firmware

Running the Duplex Board in Simplex Mode