pi-sensors: slew the onewire delay for lossy cables

overlay/pi-sensors/src/dht.rs

@@ -25,7 +25,7 @@ impl Sensor for DHT22 {
     fn read(&mut self) -> Vec<crate::Measurement> {
         let mut delay_us = |d: u16| {
             // We are using here more accurate delays than in std library
-            spin_sleep::sleep(Duration::from_micros(d as u64));
+            spin_sleep::sleep(Duration::from_micros(2 * (d as u64)));
         };
 
         self.pin.switch_output();