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opendata-stuttgart / sensors-software

sourcecode for reading sensor data
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DNMS T4.0+NodeMCU1.4 either DNMS or SDS011 values #865

Closed JaKuRe closed 3 years ago

JaKuRe commented 3 years ago

Hello,

I have created a PCB based on the "DNMS T4.0+NodeMCU1.4 PCB". Basic differences are its single sided layout and connectors for the sensors.

Everything works fine as long as no microphone is connected.

Connected devices: DHT22, BME280, SDS011, Mic.

When SDS011 is connected together with the microphone, there is an error "DNMS not found". SDS011 ist working fine. With disconnected SDS011, the Mic is found and works fine. (tried with two different Mic-models, same issue)

During the tests, the Teensy was left in his socket and both sensors were selected in the sensor configuration at all times. After switching off power, the connectors were inserted or removed, then put back on power.

Teensy and NodeMCU are about 2cm apart.

Any suggestions?

Thanks in advance. Kind regards.

pjgueno commented 3 years ago

Do the PSU provide enough current ? How many mA can it provide ?

JaKuRe commented 3 years ago

Hello pjgueno.

Thank you for your advice. Right away I switched the initial 1000mA PSU against a 2000mA PSU. I kept it running like this for almost a week and the problem is gone,

Now, the sensor gets powered by 2500mA for outdoor use.

Kind regards :)

pjgueno commented 3 years ago

You're welcome ! Where is your sensor ?

JaKuRe commented 3 years ago

My sensor is placed in Saarland, in the valley of the Moselle.

pjgueno commented 3 years ago

It will be the second in Saarland (with mine) !