Superp Posted March 13, 2021 at 08:04 AM Share Posted March 13, 2021 at 08:04 AM The documentation says: Quote Note The currently released firmware (2.0.4) does not save the calibration every 12 hours. We had to disable this because of a bug in the proprietary load/save mechanism that we can't fix. We will release a new firmware that has this enabled again as soon as this bug is fixed. My Air Quality Bricklet reports firmware_version '2.0.5'. Does this mean this bug is now fixed? related commit (Disable automatic calibration load/save for now) Quote Link to comment Share on other sites More sharing options...
Superp Posted March 22, 2021 at 02:52 PM Author Share Posted March 22, 2021 at 02:52 PM Anybody? Quote Link to comment Share on other sites More sharing options...
borg Posted March 23, 2021 at 08:54 AM Share Posted March 23, 2021 at 08:54 AM This is not yet changed unfortunately, the calibration is currently not saved in the firmware. However, i just checked the Bosch site and they have 1.4.8.0 released while we still use 1.4.7.4. Maybe it is fixed now, i wrote it on my TODO list and will check it when i have time. Quote Link to comment Share on other sites More sharing options...
Superp Posted March 23, 2021 at 10:04 AM Author Share Posted March 23, 2021 at 10:04 AM I would really appreciate that. Since March 2019 the Air Quality Bricklet no longer saves its calibration data, correct? As it takes 28 days to fully calibrate, and the system here reboots once a month, this yields max 3 days of reliable data per month. I am willing to work with you to solve this (and invest some time from my side), but if there is no solution in sight I will retire this Bricklet. Quote Link to comment Share on other sites More sharing options...
Superp Posted June 15, 2021 at 08:23 AM Author Share Posted June 15, 2021 at 08:23 AM Bump Quote Link to comment Share on other sites More sharing options...
borg Posted June 15, 2021 at 08:41 AM Share Posted June 15, 2021 at 08:41 AM Thank you for the bump and very sorry about the delays. I will be able to work on it next week. Quote Link to comment Share on other sites More sharing options...
Superp Posted June 16, 2021 at 07:19 AM Author Share Posted June 16, 2021 at 07:19 AM Great! I am pretty busy, but let me know if I can help. Quote Link to comment Share on other sites More sharing options...
borg Posted June 23, 2021 at 01:26 PM Share Posted June 23, 2021 at 01:26 PM Attached you can find a firmware that has the newest Bosch BSEC version and the calibration automatic save/load enabled. To test this i will let it run over the weekend and then on Monday unplug it and plug it in again. It should retain the accuracy then. If you want you can test it in parallel. air-quality-bricklet-firmware-2-0-6-beta1.zbin Quote Link to comment Share on other sites More sharing options...
Superp Posted June 24, 2021 at 06:12 AM Author Share Posted June 24, 2021 at 06:12 AM Flashed. Running. Quote Link to comment Share on other sites More sharing options...
borg Posted June 28, 2021 at 11:44 AM Share Posted June 28, 2021 at 11:44 AM I tried it and unfortunately the accuracy turned to "unreliable" again after the reset. I will add some debug wires and a logic analyzer to see if there is a bug in the communication with the BME680. Quote Link to comment Share on other sites More sharing options...
Superp Posted June 29, 2021 at 09:46 AM Author Share Posted June 29, 2021 at 09:46 AM Borg, mine has been running FW 2.0.6 for 5 days uninterrupted. It started with accuracy 0. Then 1. Yesterday accuracy was 3. Today it is 0 again, without rebooting. My point being that IAQ accuracy will vary wildly anyway. Your sample dropping to 0 after reboot may be caused by rebooting (losing calibration), or may be just "normal" behaviour (picking up calibration at some point during previous 12 hours). That's what I think. Quote Link to comment Share on other sites More sharing options...
borg Posted July 9, 2021 at 09:40 AM Share Posted July 9, 2021 at 09:40 AM I have a new test running over this weekend. This time with cables soldered to it to see the communication and lots of debug output. I also found a bug in the meantime. I have high hopes that it will work now! I did a test where i changed the state-save-time to 5 minutes and this worked already, but the accuracy was not high at that point of course. Quote Link to comment Share on other sites More sharing options...
borg Posted July 12, 2021 at 02:36 PM Share Posted July 12, 2021 at 02:36 PM I just released version 2.0.6. It uses the newest BSEC version, saves the calibration state every 12 hours and loads it on startup. When the calibration is loaded it still starts with IAQ Index unreliable for the first few minutes and then goes to low. In my tests it did however start with the old IAQ Index after it changed from unreliable to low. I was hoping that it starts with accuracy high when the saved state had accuracy high. But it doesn't seem to work like that. Unfortunately the whole BSEC software that is used to calculate the IAQ Index is a blackbox for us and we don't get any information from Bosch about the inner workings. Quote Link to comment Share on other sites More sharing options...
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