read dht 11 temperature

2 files changed, 28 insertions, 12 deletions

diff --git a/Cargo.toml b/Cargo.toml
index fe2190f..93d32a6 100644
--- a/Cargo.toml
+++ b/Cargo.toml
@@ -11,7 +11,7 @@ nb = "0.1.2"
 ufmt = "0.1.0"
 avr-device = "0.3"
 
-dht-sensor = "0.2"
+dht11 = "0.3"
 
 [dependencies.arduino-uno]
 git = "https://github.com/rahix/avr-hal"
diff --git a/src/main.rs b/src/main.rs
index 13e9bc3..daef02d 100644
--- a/src/main.rs
+++ b/src/main.rs
@@ -1,7 +1,8 @@
 #![no_std]
 #![no_main]
 
-use arduino_uno::prelude::*;
+use arduino_uno::{Delay, delay_ms, prelude::*};
+use dht11::Dht11;
 use panic_halt as _;
 
 #[arduino_uno::entry]
@@ -10,19 +11,34 @@ fn main() -> ! {
 
     let mut pins = arduino_uno::Pins::new(dp.PORTB, dp.PORTC, dp.PORTD);
 
-    // Digital pin 13 is also connected to an onboard LED marked "L"
     let mut led = pins.d13.into_output(&mut pins.ddr);
+    led.set_low().void_unwrap();
 
-    led.set_high().void_unwrap();
+    let mut serial = arduino_uno::Serial::new(
+        dp.USART0,
+        pins.d0,
+        pins.d1.into_output(&mut pins.ddr),
+        57600.into_baudrate(),
+    );
+
+    let mut delay = Delay::new();
+    let mut dht11 = Dht11::new(pins.d2.into_tri_state(&mut pins.ddr));
+
+    delay_ms(2000);
 
     loop {
-        led.toggle().void_unwrap();
-        arduino_uno::delay_ms(200);
-        led.toggle().void_unwrap();
-        arduino_uno::delay_ms(200);
-        led.toggle().void_unwrap();
-        arduino_uno::delay_ms(200);
-        led.toggle().void_unwrap();
-        arduino_uno::delay_ms(800);
+        led.set_high().void_unwrap();
+        arduino_uno::delay_ms(50);
+        led.set_low().void_unwrap();
+        match dht11.perform_measurement(&mut delay) {
+            Ok(meas) => ufmt::uwriteln!(&mut serial, "temp: {} hum: {}\r", meas.temperature, meas.humidity).void_unwrap(),
+            Err(e) => match e {
+                dht11::Error::Timeout => ufmt::uwriteln!(&mut serial, "error: timeout\r").void_unwrap(),
+                dht11::Error::CrcMismatch => ufmt::uwriteln!(&mut serial, "error: crc mismatch\r").void_unwrap(),
+                dht11::Error::Gpio(_) => ufmt::uwriteln!(&mut serial, "error: gpio\r").void_unwrap(),
+            }
+        }
+
+        arduino_uno::delay_ms(2000);
     }
 }