Raspberry Pi Setup & Configuration

Required Hardware

Total: $125.57 (Plus Tax & Shipping)

Software Requirements

  • Operating System: Raspbian 12 (x86/32-bit)
  • Internet connection
  • SSH Enabled

Connect to & Configure the Raspberry Pi via SSH

ssh user@raspberrypi
sudo systemctl disable bluetooth.service [email protected]
sudo systemctl mask [email protected]
grep '^dtoverlay=disable-bt' /boot/firmware/config.txt || echo 'dtoverlay=disable-bt' | sudo tee -a /boot/firmware/config.txt
sudo sed -i 's/^console=serial0,115200 *//' /boot/firmware/cmdline.txt
sudo reboot

Note: These steps were taken from the dvmhost GitHub: https://github.com/DVMProject/dvmhost under the Raspberry Pi Preparation Notes section and updated to accommodate the current Raspbian 12 file structure.

  • /boot/config.txt -> /boot/firmware/config.txt
  • /boot/cmdline.txt -> /boot/firmware/cmdline.txt

Prepare the Raspberry Pi for the MMDVM board.

ssh user@raspberrypi
sudo shutdown now
  1. Affix the MMDVM_HS_HAT_DUPLEX board to the GPIO pins on the Raspberry Pi so that the new board covers the Raspberry Pi.
  2. Screw on the provided antennas.
    1. Note: There is no designated antenna for transmit (TX) or receive (RX).

Power on the Raspberry Pi & Flash the DVM Firmware

  1. Clone the hsflash GitHub repository
git clone https://github.com/ThisGuyNeedsABeer/hsflash.git
  1. Compile the source and make hsflash executable
cd hsflash/
gcc hsflash.c -o hsflash
chmod +x hsflash
  1. Download the dvm-firmware-hs-hat-dual.bin firmware to the hsflash directory
wget https://github.com/DVMProject/dvmfirmware-hs/releases/download/2025-03-21/dvm-firmware-hs-hat-dual.bin -O dvm-firmware-hs-hat-dual.bin
  1. Flash the firmware, if stm32flash is missing, hsflash will attempt to install it.
██╗  ██╗███████╗   ███████╗██╗      █████╗ ███████╗██╗  ██╗
██║  ██║██╔════╝   ██╔════╝██║     ██╔══██╗██╔════╝██║  ██║
███████║███████╗   █████╗  ██║     ███████║███████╗███████║
██╔══██║╚════██║   ██╔══╝  ██║     ██╔══██║╚════██║██╔══██║
██║  ██║███████║██╗██║     ███████╗██║  ██║███████║██║  ██║
╚═╝  ╚═╝╚══════╝╚═╝╚═╝     ╚══════╝╚═╝  ╚═╝╚══════╝╚═╝  ╚═╝
                  * HOTSPOT FLASH EZ *

[WARN] stm32flash is not installed.
Install stm32flash now? [Y/n]: y

... apt output omitted...

Enter BOOT0 GPIO pin [default 20]: 20
Enter NRST GPIO pin [default 21]: 21
Enter firmware filename (e.g. dvm-firmware-hs-hat-dual.bin): dvm-firmware-hs-hat-dual.bin
Enter serial port [default /dev/ttyAMA0]: /dev/ttyAMA0

===== Configuration Summary =====
BOOT0 GPIO      : 20
NRST GPIO       : 21
BIN_FILE        : dvm-firmware-hs-hat-dual.bin
SERIAL_PORT     : /dev/ttyAMA0
stm32flash      : found
=================================

Proceed with flashing? [Y/n]: y
[INFO] Proceeding with firmware flash setup...
[INFO] Setting BOOT0 high (GPIO20)...
[ raspi-gpio is deprecated - try `pinctrl` instead ]
[INFO] Asserting reset (GPIO21 low)...
[INFO] Releasing reset (GPIO21 high)...
[INFO] Flashing firmware...
stm32flash 0.7

http://stm32flash.sourceforge.net/

Using Parser : Raw BINARY
Size         : 57248
Interface serial_posix: 57600 8E1
Version      : 0x22
Option 1     : 0x00
Option 2     : 0x00
Device ID    : 0x0410 (STM32F10xxx Medium-density)
- RAM        : Up to 20KiB  (512b reserved by bootloader)
- Flash      : Up to 128KiB (size first sector: 4x1024)
- Option RAM : 16b
- System RAM : 2KiB
Write to memory
Erasing memory
Wrote and verified address 0x0800dfa0 (100.00%) Done.

Resetting device...
Reset done.

[INFO] Setting BOOT0 low (GPIO20)...
[INFO] Resetting MCU to boot from flash...
[SUCCESS] Flashing complete and STM32 restarted successfully.
  1. Reboot to complete the process upon a successful flash.
sudo reboot