MMDVM Hotspot Module Board STM32 MCU 430-450MHz VHF UHF Onboard Development Board with SMA Antenna for Raspberry Pi

Specification Product Name MMDVM HS Hotspot Module BoardMCU STM32 32 bit ARM processorRadio Modem type STM32 DVM GPIO Crystal ECS TXO 3225 147 4 TRRF power output up to 10 mWFrequency range UHF 430 450 MHz 433 MHz 900 MHz main bands VHF 144 220 MHz auxiliary bands Power supply 5 V via Raspberry Pi GPIO typical current 250 mAOperating temperature 0 °C 50 °CCompatible host Raspberry Pi all models including Pi Zero Pi 0 4 Interface to Pi GPIO header I2C bus for OLED and controlOnboard TCXO 14 7456 MHz with RXOFFSET TXOFFSET adjustableFeatures 1 Supports DMR P 25 D Star and System Fusion digital voice modes 2 Pre loaded firmware upgradeable via Pi Star or SSH software tools 3 Onboard LEDs show Tx Rx PTT and Mode status for quick monitoring 4 Clean mechanical layout that mounts directly on Raspberry Pi saving space 5 SMA antenna connector with external antenna included for better RF performance 6 Open source design compatible with Pi Star simplex hotspot configuration Package Includes 1 x MMDVM HS Hotspot Module1 x SMA UHF antenna