From 5ae0eb88ac4ddd14441300b40251ee61c81da78e Mon Sep 17 00:00:00 2001
From: Maxim Prokhorov <prokhorov.max@outlook.com>
Date: Fri, 8 Nov 2019 20:31:55 +0300
Subject: [PATCH] sensor/dht: increase the delay per DHT22 datasheet

Operating specifications / Communication and signal

"Data-bus's free status is high voltage level. When communication
between MCU and DHT22 begin, program of MCU will transform data-bus's
voltage level from high to low level and this process must beyond at least
**1ms** to ensure DHT22 could detect MCU's signal, then MCU will wait 20-40us for
DHT22's response."
---
 code/espurna/sensors/DHTSensor.h | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/code/espurna/sensors/DHTSensor.h b/code/espurna/sensors/DHTSensor.h
index 93bca039..9084f81c 100644
--- a/code/espurna/sensors/DHTSensor.h
+++ b/code/espurna/sensors/DHTSensor.h
@@ -149,7 +149,7 @@ class DHTSensor : public BaseSensor {
             if ((_type == DHT_CHIP_DHT11) || (_type == DHT_CHIP_DHT12)) {
                 nice_delay(20);
             } else {
-                delayMicroseconds(500);
+                delayMicroseconds(1100);
             }
             digitalWrite(_gpio, HIGH);
             delayMicroseconds(40);