• MMDVM Duplex Version V1.52,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, up to 10mW RF power, each piece has been fully tested.We have done some setting for pi-star in the TF card.
• MMDVM hotspot is a fully-assembled device,support SLOT1,SLOT2.Supports UHF/VHF.FREQUENCY: UHF 433-900MHz, VHF 144-220 MHz. NOTE: TX =0, RX=0. Modem select: STM32_HS_GPIO;The upper part is TX,the lower is RX antenna.Set TX frequency,RX frequency，TX,RX frequency had better 10M or more apart.
• MMDVM Duplex Hotspot suits for Raspberry Pi 3,Raspberry Pi Zero W,but NOT compatible with Rasberry Pi 4. Support:D-STAR, P25, DMR ,YSF and work with UHF,enables the different mode of digital two way radio to communicate with each other. In Single mode support both Uhf and Vhf.
• Basic Setup: Set the same freq as Radio Mobile, for example: 433.550000MHZ DMR, WIFI SSID:pi-star,PASSWORD:raspberry, Need the 2.4GHz SSID as the Pi Zero W doesn't support 5.8GHz.**Note: You need to set it up before using it for the first time, please refer to the manual for details.
• Power Supply: Mobile charger or a USB cable connected to your computer or laptop. The Hotspot will also work mobile in your vehicle if you Tether it to your mobile phone network.