How To Update The Firmware

1. Download the STM32CubeProgrammer program from ST's Website https://www.st.com/en/development-tools/stm32cubeprog.html
2. Connect the Ctrl port of the device to a USB port on your computer
3. Bridge the two pins labeled "Boot" using a jumper (or see note below)
4. Power on the device: it should now be visible on your computer as a "STMicroelectronics STM32 Bootloader" device
5. Start STM32CubeProgrammer
6. On the top right hand corner select "USB" and then click "Connect". 
7. Click on "Open File" and navigate to and select the binary xxx.bin
8. Click  on "Download"
9. Wait until the download completes
10. Remove the jumper and restart the device
11. On the device open the About screen and verify the new FW version 

Note:
Instead of bridging the boot pins on the device you can also send SCPI command
SYSTem:BOOT to a running device to enter the Bootloader mode. 
This allows you to perform a FW update without opening the enclosure.


How To Unlock the Firmware
The firmware has a built-in time limitation. To unlock the firmware you need a registration  key
which you can send to the device with command SYSTem:REGistration:KEY <key>.
The registration key is available for free from info@mcu-projects.de.
Include the product name and the serial number (see reply to command *IDN?) in your request.