Regarding the unstable data of the air pressure IC HP203B

pcf2000

Regarding the unstable data of the air pressure IC HP203B [Copy link]

Regarding the problem of unstable data of air pressure IC HP203B, please tell me:

When I powered on in the morning, the air pressure data read was about 960mba. When I powered on until the afternoon, the air pressure data read was about 750mba. The data became smaller as time went on. The sensors were all in the same place. What's going on?

qwqwqw2088

960mba, to 750mba, quite a difference

Can read the value, large deviation

Has it always been like this or is this a new product test?

I feel like I should first determine whether it is a hardware problem or a software problem.

wangerxian

The atmospheric pressure will change during the day, but if you think you are floating so much, there must be something wrong with the data. You can print out the data first to see if there is a pattern between the power-on time and the atmospheric pressure change.

pcf2000

qwqwqw2088 posted on 2023-8-9 14:16 960mba, to 750mba, there is a big difference, the value can be read, the big deviation is always like this or it feels like this when testing a new product, first judge whether it is a hardware problem...

I checked the code carefully and found that the data was read correctly. The problem occurred when the data type was not handled properly during data processing. It has been corrected.

pcf2000

wangerxian posted on 2023-8-9 15:18 The atmospheric pressure will change in a day, but if you think it is so big, there must be something wrong with the data. You can print out the data first and check the power-on time...

Yes, I sent the data from the beginning of reading to processing and displaying to the PC for analysis, only to find that the data type was not handled properly during the calculation, resulting in a low-level error.

wangerxian

pcf2000 posted on 2023-8-9 16:03 Yes, the entire process from reading out the data to processing and displaying was sent to the PC for analysis, only to find that the data type was not handled properly in the calculation, resulting in low...

Haha, as long as you find the problem, LOG is still very useful!

led2015

Just solve it. Sometimes stability changes and temperature changes will affect

pcf2000

led2015 posted on 2023-8-12 19:40 Just solve it. Sometimes changes in stability and temperature will affect it.

Test it in one place, and it will change a few points a day, which is acceptable.

pcf2000

wangerxian posted on 2023-8-9 16:18 Haha, it’s good to find the problem, LOG is still very useful!

Yes, I was careless in data processing. It's like an old revolutionary encountering new problems.