Formaldehyde – local data always zero

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Home &rsaquo; Forum &rsaquo; Software &rsaquo; Formaldehyde – local data always zero This topic has 3 replies, 2 voices, and was last updated 7 years, 6 months ago by uRADMonitor. Log In Register Lost Password Viewing 4 posts - 1 through 4 (of 4 total) Author Posts September 26, 2018 at 10:46 am #6060 edodd55Participant I have an A3, type:8 hw:105 sw:135 SI29BG, ethernet connected. Reading my formaldehyde values from the local (json) data, I always have a value of zero for formaldehyde. The dashboard shows varying values. Here are graphs of locally collected values (daych20.png) and remotely stored values (Screenshot) This is a sample of values from the monitor RAD:18CPM VOL:383V 21% T:16.11C P:100440Pa H:45.88RH VOC:197680 N:34.03dB CH2O:0.00ppm PM2.5:3ug/m^3 CO2:530ppm UP:66154s WDT:31s/400s Attachments:Screenshot_2018-09-26_20-44-45.pngdaych20.png October 3, 2018 at 9:11 pm #6085 uRADMonitorKeymaster This is a bit strange, you should get a perfect match on formaldehyde. Please note the server returns it in PPB, as the local embedded webserver returns it in PPM. Make sure there are no digits lost there due to Integer operations trimming the complete values. Also make sure you local read operations are completed successfully, it is possible you sometimes get timeouts and your values stay 0. Regardless of this, please note that the correct way to go about this is to use the Server API. You can find examples and full details on http://www.uradmonitor.com/dashboard The local JSON is only offered as a bonus and for quick debug tests. It is important you use the Server API to get meaningful readings. Also because there is a calibration layer implemented only on the server side, that does some compensations for temperature and humidity on the models with the sensor placed inside (to correct aberrations caused by internal heating), but it also computes PM1 and PM10, and also VOC AQI otherwise not available locally. Let me know if you need any help migrating to the Server API. Radu March 19, 2019 at 10:19 am #6495 edodd55Participant As I saw much much later……the local data was not always zero, and at times it gets to the maximum! April 1, 2019 at 7:33 pm #6507 uRADMonitorKeymaster Please see the other thread on this. Author Posts Log In Register Lost Password Viewing 4 posts - 1 through 4 (of 4 total) You must be logged in to reply to this topic. Log In Username: Password: Keep me signed in Anti-spam: what is 4 + 2? Leave this field empty Continue with Google Log In

This topic has 3 replies, 2 voices, and was last updated 7 years, 6 months ago by uRADMonitor.

Viewing 4 posts - 1 through 4 (of 4 total)

Author

Posts
September 26, 2018 at 10:46 am #6060
edodd55
Participant
I have an A3, type:8 hw:105 sw:135 SI29BG, ethernet connected. Reading my formaldehyde values from the local (json) data, I always have a value of zero for formaldehyde. The dashboard shows varying values.
Here are graphs of locally collected values (daych20.png) and remotely stored values (Screenshot)
This is a sample of values from the monitor
RAD:18CPM
VOL:383V 21%
T:16.11C
P:100440Pa
H:45.88RH
VOC:197680
N:34.03dB
CH2O:0.00ppm
PM2.5:3ug/m^3
CO2:530ppm
UP:66154s WDT:31s/400s
Attachments:
1. Screenshot_2018-09-26_20-44-45.png
2. daych20.png
October 3, 2018 at 9:11 pm #6085

uRADMonitor
Keymaster

This is a bit strange, you should get a perfect match on formaldehyde. Please note the server returns it in PPB, as the local embedded webserver returns it in PPM. Make sure there are no digits lost there due to Integer operations trimming the complete values. Also make sure you local read operations are completed successfully, it is possible you sometimes get timeouts and your values stay 0.

Regardless of this, please note that the correct way to go about this is to use the Server API. You can find examples and full details on http://www.uradmonitor.com/dashboard

The local JSON is only offered as a bonus and for quick debug tests. It is important you use the Server API to get meaningful readings. Also because there is a calibration layer implemented only on the server side, that does some compensations for temperature and humidity on the models with the sensor placed inside (to correct aberrations caused by internal heating), but it also computes PM1 and PM10, and also VOC AQI otherwise not available locally.

Let me know if you need any help migrating to the Server API.

Radu

March 19, 2019 at 10:19 am #6495

edodd55
Participant

As I saw much much later……the local data was not always zero, and at times it gets to the maximum!

April 1, 2019 at 7:33 pm #6507

uRADMonitor
Keymaster

Please see the other thread on this.
Author

Posts

Viewing 4 posts - 1 through 4 (of 4 total)

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