I bought an AT Pro 2, experienced non working PM sensors. Returned it and purchased a second one only to experience the exact same problem.
Latest firmware (3.0.18); PM continuous reading. Latest IOS app version. Tried with 3 iPhones, all with the latest IOS version and one with a clean re-install. I can hear the quiet fan activating every 20-30 seconds. I tried resets, app reinstall, re-pairing. Nothing helps.
I would love not to return the product and give up on it because the specs are perfect but I don’t know what else to do.
I am in the same situation, I have a version one and a version two, mine doesn’t work, just the same way as you described. Even forcing the calibration is at the end hopeless, once back inside after a day outside, it gives erratic results. It behaves like a cheap Chinese product, unfortunately. I mailed ATMO for a refund, ATMO never answered, and will not answer my mails at all.
The controversy is that version one is working well, and based on that one I bought version two, which is a total fiasco.
The problem is hardware, there is no NDIR sensor in it, and they tried to compensate the actual sensor with software, and it just doesn’t work out. I compared it with an expensive NDIR device and it hopeless
Just as you, I have no solution, no answers, no mail, no Support, no money. Thank you ATMO
Hi @Searche please mail info@atmotube.com. I do not see any ticket related. I suppose you are talking about CO2 sensor, not PM. Please share data from the atmotube (CSV) and from reference device
I have the PRO version 1st generation and I’m satisfied with it; it does its job. Based on this experience, I bought the RPO 2 because it was supposed to have a CO2 meter. Knowing ATMO, I expected an excellent product, but nothing could be further from the truth. The results displayed, whether or not they’re displayed, are simply incorrect. The CO2 meter isn’t based on NDIR technology, which actually measures CO2 thanks to this technology, without interpretation or indirect values. I didn’t expect the PRO 2 to be this bad from ATMO. This is a massive design flaw. ATMO should have created a new device that would have been slightly larger, including NDIR hardware. It might have been flatter or longer, but the customer would know why they paid USD 300, like I did. Now I own a device that displays improbable CO2 values, and the PM values ​​are nonexistent. I also had to modify the temperature sensor. Customers who buy an ATMO PRO 2 already have multiple devices, and comparing them is easy. In other words, I have an ATMO PRO 2 that displays values ​​I’d expect from a cheap device from a Chinese website. The decision to incorporate inferior technology into an existing device was wrong; this is a bad decision. I even see that a customer ordered 70 devices. That’s not an amateur, he would probably need it for professional purposes. We all had confidence in ATMO, and ATMO has damaged that. Not only does it display incorrect or nonexistent values ​​for which there’s no solution, but even if there were, it’s software manipulation to display some guideline values isn’t what we bought the PRO 2 for. European cars have also experienced “dieselgate” manipulations in the past, with the resulting consequences and a class action lawsuit. We, the customers, deserve a device that works as promised on the date we purchased it, and ATMO hasn’t delivered what we, the customers, paid for. In other words, they never worked. I emailed ATMO a week after purchase demanding a refund, but I never received a response.
Hi @Searche we appreciate if you can forward your email again.
Regarding the CO2 sensor - it is a Sensirion sensor, not a cheap generic one. We conducted year-long testing, and it demonstrated good performance within the specified accuracy. It does react a bit differently compared to standard NDIR sensors, and we are working closely with Sensirion to further optimize its performance. This is a compromise between size, power consumption, and accuracy.
The PM sensor is the same as in the PRO model. Most likely, this is a software issue that we can fix quickly.
Please share your real name or email to DM - I will forward it to support team
Hi, I emailed you this afternoon. All info is within the mail., if not, please let me know with DM. Thank you.
I well received your reason for a compromise in choices for the sensor and i shared my point of view as a returning costumer. The NDIR sensor has a very high sensivity towards CO2 in low concentrations and is superior for indoor air quality measurements, that is what we are looking for as a costumer in this price-range. I haven’t said that the sensor used was cheap, but at the end .. it behaves like .. thank you for your feedback.
Thank you for your patience. Firmware 3.0.19 includes a fix for the PM start issue.
We discovered that in some cases the PM sensor did not properly respond to initialization/start commands. This behavior has been corrected in the latest firmware release.
If you still experience any PM-related issues after updating to 3.0.19, please let us know.