[Bug] SPIKE Prime crashes when trying to read data from ColorSensor.

[dlech]

It looks like the issue has returned. When I try to read data from the color sensor, the Spike Prime freezes, and only a reset helps.

('primehub', '3.6.1', 'ci-release-86-v3.6.1 on 2025-03-11')

We have make 100s of changes since this release. Could you please try https://beta.pybricks.com with firmware version 4.0.0b3?

Pybricks MicroPython ci-release-88-v4.0.0b3 on 2025-12-05; SPIKE Prime Hub with STM32F413VG
Type "help()" for more information.
>> sensor = ColorSensor(Port.D)
_ (blinking)

Pybricks MicroPython ci-release-88-v4.0.0b3 on 2025-12-05; SPIKE Prime Hub with STM32F413VG
Type "help()" for more information.
>> device = PUPDevice(Port.D)
>> device.info()
{'id': 61, 'modes': (('COLOR', 1, 0), ('REFLT', 1, 0), ('AMBI', 1, 0), ('LIGHT', 3, 0), ('RREFL', 2, 1), ('RGB I', 4, 1), ('HSV', 3, 1), ('SHSV', 4, 1), ('DEBUG', 4, 1), ('CALIB', 7, 1))}
>> device.read(2)
_ (blinking)

Apparently the same.
@dlech

Originally posted by @bezig01 in #456

[dlech]

Does this happen only with the color sensor or with all sensors?

Is this a genuine LEGO sensor or a 3rd-party clone?

[bezig01]

Everything I have is original. I also have an Ultrasonic sensor, and it works.

Pybricks MicroPython ci-release-88-v4.0.0b3 on 2025-12-05; SPIKE Prime Hub with STM32F413VG
Type "help()" for more information.
>>> device = PUPDevice(Port.B)
>>> device.info()
{'id': 62, 'modes': (('DISTL', 1, 1), ('DISTS', 1, 1), ('SINGL', 1, 1), ('LISTN', 1, 0), ('TRAW', 1, 2), ('LIGHT', 4, 0), ('PING', 1, 0), ('ADRAW', 1, 1), ('CALIB', 7, 0))}
>>> [device.read(i) for i in range(len(device.info()["modes"]))]
[(-1,), (-1,), (-1,), (0,), (134217727,), (0, 0, 0, 0), (-1,), (12,), (18, 52, 86, 120, 0, 0, 0)]
>>> 

Interestingly, if I use the original firmware, everything works — color, reflection, and RGBI.