SDS011 particle sensor

os3n6c
Posts: 2
Joined: Sat Sep 05, 2020 5:18 pm

SDS011 particle sensor

Postby os3n6c » Mon Jan 11, 2021 10:45 am

Hi,

I want to connect a SDS011 particle sensor to a SBC-NodeMCU-ESP32

The datasheeet of SDS011 says it needs 5V power supply. But my ESP32 doesn't have 5V power supply. There is a similar setup described here. They use the VU/VIN pin of the NodeMCU to connect it to the 5V input (pin 3) of SDS011.
I checked it, there is a voltage of 5V between VIN and GND.

Would it be possible to power the SDS011 via the VIN pin?

How do I have to connect the data pins?
R goes to RX0 and T to TX0?

PeterR
Posts: 582
Joined: Mon Jun 04, 2018 2:47 pm

Re: SDS011 particle sensor

Postby PeterR » Mon Jan 18, 2021 11:57 pm

What do you have connected to 5V vin i.e. what power source?
The device needs around 70mA & so should be good with most power supplies.
ESP gets a little dodgy on USB power when running hot and with peripherals. An external PSU is recommended.
Is the device 5V or 3.3V logic? You might need level shifters.
A decent FTDI will have both 5V and 3.3V sources but check currents.
& I also believe that IDF CAN should be fixed.

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