WIDELY COMPATIBLE: Supports DMR, P25, D-Star and System Fusion. Equipped with high-performance 32-bit ARM processor, maximum 10mW RF transmit power. Every unit undergoes complete testing. Compatible with Raspberry Pi 1, 2/2B, 3/3B/3B+, 4/4B, Pi Zero and Pi Zero 2W
Frequency Parameters: Supported frequency bands: 144–148MHz, 219–225MHz, primary bands 420–475MHz, 842–950MHz
Recommended amateur radio operating band: 430–440 MHz.
NOTE: TX=0, RX=0.
Modem option: STM32-DVM/MMDVM_HS-Raspberry Pi Hat (GPIO) or other GPIO-compatible boards
Important Reminder: If the module cannot run under duplex mode, execute the firmware upgrade command:
sudo pistar-mmdvmhshatflash hs_dual_hat
If the command fails, replace Pi-Star with WPSD for MMDVM configuration: https://www.mmdvm.club/index.php/wpsd.html
Up-to-Date Firmware: This MMDVM Duplex Hotspot Module comes pre-installed with firmware V1.5.2 and supports upgrading to V1.6.1.
Upgrade Steps:
Enter Pi-Star → Expert → SSH Access
Username: pi-star | Password: raspberry
Connect JP1 jumper first, then execute the upgrade command. Disconnect JP1 after the upgrade completes
Package List:
1 × MMDVM Duplex Hotspot Module (Pre-installed 0.96-inch OLED Screen)
2 × Antennas
Please feel free to reach out to us if you have any problems during use, we are ready to provide support
