[−][src]Crate sen0177
sen0177
is a Rust library/crate that reads air quality data from the
SEN0177 air quality sensor.
Prerequisites
- You've connected the sensor to a UART on a Linux-based device, and that UART is enabled and available from the kernel as a TTY device node.
Installation
Include the following in your Cargo.toml
file:
[dependencies]
sen0177 = "0.1"
Usage
use sen0177::{Reading, Sen0177}; const SERIAL_PORT: &str = "/dev/ttyS0"; let mut sensor = Sen0177::open(SERIAL_PORT).expect("Failed to open device"); let reading = sensor.read().expect("Failed to read sensor data"); println!("PM1: {}µg/m³, PM2.5: {}µg/m³, PM10: {}µg/m³", reading.pm1(), reading.pm2_5(), reading.pm10());
Note that the serial device occasionally returns bad data. If you
receive Sen0177Error::InvalidData
or Sen0177Error::ChecksumMismatch
from the Sen0177::read
call, a second try will usually succeed.
Gotchas
Raspberry Pi
If you're using this with a Raspberry Pi, note that by default the
primary GPIO pins are set up as a Linux serial console. You will need
to disable that (by editing /boot/cmdline.txt
) before this will work.
Instead of using a specifiy TTY device node, you should use
/dev/serial0
, which is a symlink to the proper device.
Alternatively, you can use the second UART, but you'll need to load an overlay to assign it to GPIO pins. See UART configuration and the UART-related overlays for more information.
Structs
Reading | A single air quality sensor reading |
Sen0177 | An instance of the SEN0177 air quality sensor |
Enums
Sen0177Error | Describes errors returned by the SEN0177 sensor |