Seems to be silently fixed for me since last week after firmware update to 3.3.9.
I’m still seeing my CO2 readings drop out occasionally (maybe every couple of weeks or so) until I reboot the monitor. I-9PSL-DE running 3.3.9.
In the Hardware section you can add the column for your wifi signal. Can you see if the signal gets low at the same time as it stops out? -75 or lower.
Are the other sensors still reporting?
I’m sorry, but I can’t figure out how to add the WiFi strength column… And yes, all the other sensors keep reporting, and always have. This is curious, though - I recently installed an outdoor AirGradient monitor, and it looks like the CO2 readings on it drop out at the same time as the indoor monitor, which seems to indicate some kind of backend issue? First screenshot below shows good readings on the PM2.5 sensor while the CO2 sensor readings drop out. Second screenshot shows the outdoor CO2 readings dropping out simultaneously with the indoor readings.
Hi @MMMurphy,
It looks a little bit different on phone, but you can enable the WiFi Strength column here:
Please click on the icon with three columns (as seen in the top-right of the image above). This will let you select which parameters are shown on your dashboard. Single Strength will be one of the options!
If it’s anything lower than -75, the issue could be related to signal strength.
I came to the forum to report this as well. My CO2 is dropping out. It displays zero and one green LED. Only fix is a power cycle. It was working flawlessly for months prior.
Any debug steps I can take?
Hi @cbcjock! Can you please contact us via support form here: https://www.airgradient.com/support/
Please provide the monitor SN as well, thank you!
Any update on this issue? Thanks.
Hi @MMMurphy, does this still occur if you downgrade to older firmware? You can downgrade the firmware under General Settings → Firmware → untick ‘Always update to the latest stable version’ and select an older version. Perhaps 3.2.0.
I’m unsure if this will make a difference since you’ve been having issues with the CO2 sensor for a while, but it may help us isolate the issue.
If the issue continues to occur, could you please reach out to support@airgradient.com and ask for Ethan? I will make sure this gets solved.
Thank you!
This has started happening for me, too. Will contact support.
I have been having this happen on four different devices on and off. Pretty much all started around the same time, too. I’ve emailed Support but posting here for the community and posterity.
My email to support:
I own four Airgradient sensors (three indoor and one outdoor) and they worked pretty well for a long time.
In the last month or two, ALL four of them have started having problems with their CO2 sensor. The readings coming from the sensor just… stop. What on Earth is going on here?
A power cycle fixes the problem for a while but it seems to come back within a week or two. I have attached a graph showing all four sensors having the problem within a 24 hour period on firmware 3.3.8.
REDACTED is having the problem as I type this. The “rco2” value is simply missing from the JSON output of the device at /measures/current
Serial numbers of all four devices:
REDACTED
REDACTED
REDACTED
REDACTED
What I failed to mention in that email is that I built and flashed 3.3.9 onto all the devices a few days ago and one of them is already having the problem again.
This is still happening to me. Occurring both indoors and on the O-1PST unit.
I appreciate that this project is open source and community-driven, but it’s completely unacceptable for this issue to be continuing for nearly a year now. At the very least introduce an alert so we know to go power cycle these units when they stop reporting values for say 12 hours etc.