SDS011 sensor broken?

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1

Hi,

My SDS011 sensor is not giving any data anymore. After many years working fine it stopped a while ago and I forgot about it :frowning:

So I want to try to get my sensor working again, and took it inside (out of the weather resistant housing/tube).

When restarting the esp32 and SDS011, the fan of the SDS011 starts spinning, and stops (initializing), after some time the red led on the back is blinking, and the fan spins again. After that a short blue blinking led on the board.

I noticed in the debug log the following:

airRohr: NRZ-2024-136-B2/EN
mounting FS...
opened config file...
parsing json: Ok
No Next PM... serialSDS 9600 8N1
output debug text to displays...
Connecting to WiFI-XXXXX
.....
WiFi connected, IP is: 192.168.1.23
Starting Webserver... 192.168.1.23

ChipId: 1320497

MAC Id: c4d8d5142631
Read SDS...: 
Stopping SDS011...
Read DHT...
Read BMx280...
Trying BMx280 sensor on 77 ... not found
Trying BMx280 sensor on 76 ... found
Send to :
sensor. community
Feinstaub-App
Madavi. de
----
Sws: data json...
ws: data json...
Temperature (°C): 25.50
Humidity (%): 99.90
----
## Sending to sensor. community - DHT22
Succeeded - api. sensor. community
Temperature (°C): 24.98
Pressure (Pa): 101288.69
Humidity (%): 100.00
----
## Sending to sensor. community - BME280
Succeeded - api. sensor. community
## Sending to madavi. de: 
Succeeded - api-rrd. madavi. de
## Sending to Server FS App: 
Succeeded - server. chillibits. com
Time for Sending (ms): 4047
ws: data json...
ws: data json...
ws: data json...
Temperature (°C): 25.50
Humidity (%): 99.90
----
## Sending to sensor. community - DHT22
Succeeded - api. sensor. community
Temperature (°C): 24.99
Pressure (Pa): 101289.31
Humidity (%): 100.00
----
## Sending to sensor. community - BME280
Succeeded - api. sensor. community
## Sending to madavi .de: 
Succeeded - api-rrd .madavi .de
## Sending to Server FS App: 
Succeeded - server. chillibits .com
Time for Sending (ms): 3230

So it starts and stops the SDS011 sensor, any not further initializing it it seems.

The other two sensors (BME280 and DHT22) look like they have a humidity issue as well.

Any ideas how to proceed, of should I just order the new sensors?

2

I replaced the SDS011 and DHT22 sensor, now normal values are displayed (still need to replace the BME280 sensor), the SDS011 J34 connection has now 3 wires instead of 2 (rev. 2.18-4, old one was 2.18).

Read SDS...: 23-06-26(87b7)
Stopping SDS011...

My initial setup was like in 2018 or so, some sensor degradation was expected.