MMDVM Duplex Hotspot Module V1.5.2
Professional duplex operation with dual ADF7021 chips for seamless DMR communication. Features the Original ECS-TXO-3225-147.4-TR crystal from the USA designed for advanced duplex capabilities.
Professional duplex operation with dual ADF7021 chips for seamless DMR communication. Features the Original ECS-TXO-3225-147.4-TR crystal from the USA designed for advanced duplex capabilities.
Advanced duplex communication technology for professional applications
Features two ADF7021 chips enabling true duplex operation with two time slots on DMR for enhanced communication capabilities.
Supports DMR, P-25, D-Star, and System Fusion digital modes. Powered by a 32-bit ARM processor with up to 10mW RF power.
Designed to mount effortlessly on various Raspberry Pi models, including Pi Zero (not compatible with Raspberry Pi 4).
Operates on UHF 433-900MHz and VHF 144-220 MHz with reliable performance across multiple frequency bands.
Quick configuration guide for optimal performance
Select modem type as STM32-DVM/MMDVM_HS-Raspberry Pi Hat (GPIO) for optimal performance.
For duplex mode setup, use the following command:
sudo pistar-mmdvmhshatflash hs_dual_hat
Access Pi-Star with username: pi-star and password: raspberry. Set BOOT0=1 and BOOT1=0, solder JP1, then run the upgrade command. Disconnect JP1 after completion.
⚠️ Important Note:
TX = 0, RX = 0. If standard upgrade fails, consider replacing Pi-Star with MMDVM using the WPSD guide.
Get professional duplex operation capabilities with the MMDVM Duplex Hotspot Module V1.5.2
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