thingy 52 crash

[Marty de Vries]

We recently purchased a few Thingy 52s, and we're very impressed with the simplicity!

After playing with the Thingy 52,and upgrading the FW to 2.2.0, I noticed that the device locks up after a while. This manifests itself as a blinking yellow/green LED, and it's not possible to connect to the Thingy anymore.

The only way to get back control is to turn the power off and then back on again.

In 'normal operation', the blue LED is flashing away happily, and when the device enters sleep, pressing the button on the front of device or shaking it usually works. However, this 'locked up' state appears quite often.

Any ideas?

-Marty.

[Marty de Vries]

I ran a test on three thingys sitting next to each other. There was about a -/+2 degree difference between them. Removing the thingy from the casing didn't improve matters either. Perhaps the temperature sensor is a little crappy, or that there's a issue with the compensation algorithm?

[Karl Ylvisaker]

I understand, thank you for performing the test.

Did all the three thingy's had the same temperature measurement, regardless of if they were still in the casing or not, and regardless of how long the battery had been in use?
This sounds very strange - I have not heard any other complaints about offset in the temperature sensors, to my knowledge they are fairly accurate. From the datasheet of the supplier the minimum accuracy is stated to + - 0.5 C within the 15 - 40 C operating range.
Could you provide me with the production week numbers for the Thingys you have on hand? There should be a small sticker on the side of the thingy:52 box.
With this, I can go through the logs to see if there has been any other mention about inaccurate measurements earlier.

Best regards,
Karl