SDS011 suddenly no longer available

FAQ
1

Hi all,

I have a fairly standard setup … my ESP8266 sits on an Airrohr circuit board and I have the SDS, a BME and a DNMS attached to it.
All worked fine until ~a month ago. Suddenly the SDS does no longer provide data as it is apparently not recognized by the ESP.

*ID: 100xxxxx (e8db8499c4a4)*
*Firmware: NRZ-2020-133/DE (Nov 29 2020)*
*Übersicht » Debug Level*

*airRohr: NRZ-2020-133/DE*
*mounting FS...*
*opened config file...*
*parsed json...*
*output debug text to displays...*
*Connecting to <<myWIFI>>*
*....SNTP synced: Wed Aug 18 09:28:42 2021*

*twoStageOTAUpdate*
*output debug text to displays...*
*.*
*WiFi connected, IP is: 192.168.178.43*
*Starting Webserver... 192.168.178.43*

*ChipId: 100xxxxx*

*MAC Id: e8db8499c4a4*
*Read SDS...: *
*Stopping SDS011...*
*Read BMxE280...*
*Trying BMx280 sensor on 76 ... found*
*Read DNMS...*
*Trying DNMS sensor on 0x55H  ... found: DNM*

Of course, I already restarted multiple times (soft and hard reset), validated cables etc … Any further suggestions?

Many thanks in advance!

Bests,
Ralph

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2

Try dev version or previous stable version. That might be a SW problem…

3

Power supplie too weak? If thé dnms is also there, you Need a good one

4

Ok, thx - will try another SW on the weekend. I do not think, it is a Powersupply Issue, as it was working flawlessly for weeks …

Bests,
Ralph

5

Did you check all the connections? Silly to say, but I had a sensor disappear once, and it appeared to be the cables weren’t connected properly. I hope you will fix it soon!

6

Will check again tomorrow… I did check already, but just to be sure.
If nothing changes, I’ll have to buy a ne sensor. Any recommendations? :wink:

7

Which did you go for? I have the exact same thing, all other sensors report fine, the SDS011 just died, out of nowhere.

8

I find the SDS011 never reaches the expected lifespan. Maybe the location is very hard on the sensor?

9

As of today, my sensor is also no longer providing data. It has done its job for two months without any problems. I now have only dashes in the fine dust values. Have already performed a reboot.

10

As always : wifi range or PSU…

11

Next weekend I’ll open the box and look for possible failures. Wifi signal is around -61 dBm. PSU is a MeanWell HDR-15-5. Webinterface and BME280 are still working. So I think something with the SDS011 is wrong.

12

Lifespan of SDS011 varies greatly. The SDS011has a recommended installation orientation. Did you comply?

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Schermafbeelding 2022-11-22 om 21.47.48643×572 46.8 KB

13

Yes, my one is installed like the first scheme.

14

I mounted the sensor and other components on din-rail in a big electronic box. A silicone hose ~30-40cm goes outside the box. The Box has near the SDS011 a hole protected with mesh to let the air from the fan goes outside the box. Next weekend I’ll post a picture. Maybe someone can see where the problem is

1 Like
15

Have you tried to briefly remove it from the power outlet? Simply rebooting does not always work, you also need to power cycle it.

16

Thank you! A power cycle did the trick :smiley:

17

You are welcome. :grinning:
That seems to happen a lot, I wonder how many have experienced this.

18

At least one person… :slight_smile:

19

My installation is hard wired. It’s not easy to power cycle. That’s the reason I only tried to reboot. Have to install a sonoff or Shelly for next time :wink:

20

Make it two, please.

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