SDS011 readings interval

Hi,
thanks for reading. I am activating a new sensors station with SDS011 and BMP280.
As i can see from the dump I noticed that the PM values ​​are sent sometimes, but not as often as the temperature, humidity and pressure readings. Is this considered normal? That is, the data from all sensors should be sent all in the same period? Thanks!

If there is data it gets send together. You can check on the sensors web interface the logs and see, if there is SDS data. As far as I understand the measurements are all triggered at the same time usually all 145 sec.

1 Like

Welcome on board!
Can I see the graphs. Please give me the Board ID and the Sensor ID.
It is not normal. The data should be sent at the same time.

Hello,
thanks!
The board id is 8555127 and the sensor id is 86390 (SDS) and 86390(BME).

In the device status i see the SDS011 errors number equal to the number of measurements… But i don’t understand why since, even if sometimes, as i can see from the debug, the PM values seems to be read and sent ok…

I’ve also checked the SDS by running the arduino code and it’scorrectly working.
The 5V source comes from a 3 amp wall adapter.
Thank you for your sugestions!

It is strange. It seems it misses 1/2 measurements in the graph. Try to check the connections of the SDS. I had never seen that… and I have seen a lot since 2016 :rofl:

Try to change the PSU anyway

Hi, psu changed but same resuts. It reads SDS values sometimes, but not every time.
I will check again connections even if i’m pretty shure they aren’t the cause of the problem.
Thanks so much!

----
/R BME280
## Sending to sensor.community - BME280
Succeeded - api.sensor.community
## Sending to madavi.de: 
Succeeded - api-rrd.madavi.de
## Sending as csv: 
CSV Output: {"software_version": "NRZ-2020-133", "sensordatavalues":[{"value_type":"BME280_temperature","value":"13.46"},{"value_type":"BME280_pressure","value":"100421.81"},{"value_type":"BME280_humidity","value":"55.59"},{"value_type":"samples","value":R/ SDS011
/R SDS011
R/ SDS011
/R SDS011
R/ BME280
Temperature (°C): 13.33
Pressure (hPa): 100424.72
Humidity (%): 56.17
----
/R BME280
## Sending to sensor.community - BME280
Succeeded - api.sensor.community
## Sending to madavi.de: 
Succeeded - api-rrd.madavi.de
## Sending as csv: 
CSV Output: {"software_version": "NRZ-2020-133", "sensordatavalues":[{"value_type":"BME280_temperature","value":"13.33"},{"value_type":"BME280_pressure","value":"100424.72"},{"value_type":"BME280_humidity","value":"56.17"},{"value_type":"samples","value":R/ SDS011
/R SDS011
R/ SDS011
/R SDS011
R/ SDS011
PM10 (sec.) : 16.20
PM2.5 (sec.): 9.10
/R SDS011
PM10:  16.20
PM2.5: 9.10
----
## Sending to sensor.community - SDS011
Succeeded - api.sensor.community
R/ BME280
Temperature (°C): 13.45
Pressure (hPa): 100420.16
Humidity (%): 55.66
----
/R BME280
## Sending to sensor.community - BME280
Succeeded - api.sensor.community
## Sending to madavi.de: 
Succeeded - api-rrd.madavi.de
## Sending as csv: 
CSV Output: {"software_version": "NRZ-2020-133", "sensordatavalues":[{"value_type":"SDS_P1","value":"16.20"},{"valueR/ SDS011
/R SDS011
R/ SDS011
/R SDS011
R/ BME280
Temperature (°C): 13.45
Pressure (hPa): 100428.84
Humidity (%): 54.48
----
/R BME280
## Sending to sensor.community - BME280
Succeeded - api.sensor.community
## Sending to madavi.de: 
Succeeded - api-rrd.madavi.de
## Sending as csv: 
CSV Output: {"software_version": "NRZ-2020-133", "sensordatavalues":[{"value_type":"BME280_temperature","value":"13.45"},{"value_type":"BME280_pressure","value":"100428.84"},{"value_type":"BME280_humidity","value":"54.48"},{"value_type":"samples","value":R/ SDS011
/R SDS011
R/ SDS011
/R SDS011
R/ BME280
Temperature (°C): 13.34
Pressure (hPa): 100418.53
Humidity (%): 54.39
----
/R BME280
## Sending to sensor.community - BME280
Succeeded - api.sensor.community
## Sending to madavi.de: 
Succeeded - api-rrd.madavi.de
## Sending as csv: 
CSV Output: {"software_version": "NRZ-2020-133", "sensordatavalues":[{"value_type":"BME280_temperature","value":"13.34"},{"value_type":"BME280_pressure","value":"100418.53"},{"value_type":"BME280_humidity","value":"54.39"},{"value_type":"samples","value":R/ SDS011
/R SDS011
R/ SDS011
/R SDS011
R/ SDS011
/R SDS011
R/ BME280
Temperature (°C): 13.16
Pressure (hPa): 100429.84
Humidity (%): 55.53
----