With the latest firmware update I changed the way the buttons on the board work. In the past the BOOTSEL button on the Pico would always change the mode of the detector while the other button on the main board toggled the buzzer. This was always a bit odd to use honestly, especially when you have an OLED installed directly on the pin header next to the button.

With firmware version 4.1.0 the large button on the main board now took over the BOOTSEL button's job and changes the mode as well. BOOTSEL on the Pico will from now on always reboot the device into bootloader mode for easier updating. You can change the mode by pressing shortly on the other more accesible and larger button. Long-pressing on the button will toggle the buzzer on or off.

Also the display now reacts more quickly to reflect the change in mode by changing the screen after you pressed the button.

And last but not least, today I managed to break my record for my personal best achieved energy resolution. I used the same mushroom sample (Cs-137) that I always used before and got 7.4% @ 662keV, nice!

This is the configuration I used: 1x1" with 2x2 SiPMs like previously, but with a new detector main board.

It's actually one of the pre-assembled boards, which interestingly slightly outperformed my hand-soldered version by almost half a percent lol

Cheers!