4.01 firmware update released for Nuclear Pioneer MCA. You can download the hex file from rhelectronics website:
What is new in 4.01:
1. Better and faster Cs-137, Am-241 and Ra-226 RIID detection. Reduced the number of false detection events
2. Added few BLE commands for calibration through smartphone terminal application, see user manual for more details
3. Changed starting position of a channel pointer during energy calibration
4. Minor changes in battery voltage monitoring and initial ADC configuration
You must to recalibrate LLD, HLD, doserate factors, timestamp and energy scale after making firmware update. For fimrware update instruction please download user manual PDF.