Error reading data! feinstaub ulm

[dg1nmt]

Hi githubber,

I have the problem error reading data! on my test from feinstaub ulm as well.

Cooler always running. No measure of PM 2.5 and pm 10 (vaule 0)

Cables and hardware checked for hours

Tried even new SDS011.

Only Error reading data!
Fan always running

solution for one run
After some hours I reversed on arduino Pin 7 and Pin 8 just for fun.
Now sensor works and delivers data.

SDS -> arduino
Pin 6 to Pin 9
Pin 7 to Pin 8

Works now
But only for one measurement

After next 5 minutes fan doesn't start.
Error reading data!

After power-off power-on
first run ok (tested with dust of a candle)

Then same game again.

SDS bought from REICHELT

Serial SDS011
5002-7DDC
5002-821A

[dg1nmt]

switch of sleep-mode leads to continous reading but works for test

look for search for following line in ttnulmdust.ino
#define SLEEP_ON 0