adam/pico-enviro-sensor
1
0
Fork 0
Code Issues Pull Requests Actions Packages Projects Releases Wiki Activity

Switch to fork with CO2 level target get & set

Browse Source
This commit is contained in:
Adam 2025-07-03 20:14:02 +01:00
parent d6213d2498
commit 8b923b8a8b
3 changed files with 15 additions and 3 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

3
Cargo.lock generated
View File

@ -2000,8 +2000,7 @@ dependencies = [
[[package]] [[package]]
name = "scd4x" name = "scd4x"
version = "0.4.0" version = "0.4.0"
source = "registry+https://github.com/rust-lang/crates.io-index" source = "git+https://github.com/twokilohertz/scd4x-rs.git?branch=self-calib-tgt#3ec7b975b32ed8ec47c71ecee3711f430871bd2e"
checksum = "550fedc97e7880654aa7dc840f5eb3b2201a01aae566c4584a3601bb0086cd4c"
dependencies = [ dependencies = [
"embedded-hal 1.0.0", "embedded-hal 1.0.0",
"log", "log",

2
Cargo.toml
View File

@ -44,7 +44,7 @@ embedded-graphics = "0.8.1"
embedded-graphics-framebuf = "0.5.0" embedded-graphics-framebuf = "0.5.0"
# Peripherals # Peripherals
scd4x = { version = "0.4.0", features = ["scd41"] } scd4x = { git = "https://github.com/twokilohertz/scd4x-rs.git", branch = "self-calib-tgt", features = ["scd41"] }
ssd1351 = "0.5.0" ssd1351 = "0.5.0"
display-interface-spi = "0.5.0" display-interface-spi = "0.5.0"

13
src/sensor_task.rs
View File

@ -8,11 +8,15 @@ use scd4x::Scd4x;
use crate::{I2c0BusMutex, SENSOR_DATA_SIGNAL}; use crate::{I2c0BusMutex, SENSOR_DATA_SIGNAL};
const BACKGROUND_CO2_PPM: u16 = 427;
/// Read CO2/temp./humidity data from the sensor /// Read CO2/temp./humidity data from the sensor
#[embassy_executor::task] #[embassy_executor::task]
pub async fn sensor_read_task(i2c_bus: &'static I2c0BusMutex) { pub async fn sensor_read_task(i2c_bus: &'static I2c0BusMutex) {
debug_rprintln!("Sensor read task started"); debug_rprintln!("Sensor read task started");
// Initialise SCD41
Timer::after_millis(30).await; // SCD41 power-up delay Timer::after_millis(30).await; // SCD41 power-up delay
let i2c_dev = I2cDevice::new(i2c_bus); let i2c_dev = I2cDevice::new(i2c_bus);
@ -20,6 +24,11 @@ pub async fn sensor_read_task(i2c_bus: &'static I2c0BusMutex) {
scd41.wake_up(); scd41.wake_up();
scd41.reinit().unwrap(); scd41.reinit().unwrap();
// https://climate.nasa.gov/vital-signs/carbon-dioxide/?intent=121
scd41
.set_automatic_self_calibration_target(BACKGROUND_CO2_PPM)
.unwrap();
match scd41.serial_number() { match scd41.serial_number() {
Ok(serial) => debug_rprintln!("[SCD41] Serial number: {}", serial), Ok(serial) => debug_rprintln!("[SCD41] Serial number: {}", serial),
Err(error) => debug_rprintln!( Err(error) => debug_rprintln!(
@ -28,6 +37,8 @@ pub async fn sensor_read_task(i2c_bus: &'static I2c0BusMutex) {
), ),
} }
// Measurement loop
scd41.start_periodic_measurement().unwrap(); scd41.start_periodic_measurement().unwrap();
loop { loop {
@ -53,4 +64,6 @@ pub async fn sensor_read_task(i2c_bus: &'static I2c0BusMutex) {
} }
} }
} }
scd41.stop_periodic_measurement().unwrap();
} }