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--- amc2020:group_n:dht22 [2020/07/28 20:44] – [3.1 Pullup Resistors] jonas001
+++ amc2020:group_n:dht22 [2021/08/24 17:35] (current) – external edit 127.0.0.1
@@ Line 1: / Line 1: @@
+<html>
+  <left>
+    <a href="https://wiki.eolab.de/doku.php?id=amc2020:group_n:start"; onmouseover="style.color='green'";>
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+        &#8617 Back to the main page
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+</html>
 ====== DHT-22 Air Temperature and Humidity Sensor ======
@@ Line 95: / Line 105: @@
 | Repeatability             | $\pm$ 1 % RH                       | $\pm$ 0.2 °C       |
 The specifications are also available in the {{https://cdn-shop.adafruit.com/datasheets/Digital+humidity+and+temperature+sensor+AM2302.pdf| AM2302 Datasheet}}.
+^{{:amc2020:group_n:esp32_dht22.png?direct&300|Figure 3}}^
+|**//Figure 3//** Connection of ESP32 and DHT-22.|
 ==== 3.1 Pullup Resistors ====
@@ Line 129: / Line 142: @@
 === 3.2.3 Upload-issues using the ESP32 DevkitC VB ===
-When using the ESP32 instead of an Arduino, the Arduino IDE can give a time out error (figure 4) during the upload if the DHT-22 is already connected to the ESP32:
+When using the ESP32 instead of an Arduino, the Arduino IDE can give a time out error (figure 5) during the upload if the DHT-22 is already connected to the ESP32:
-^{{:amc2020:group_n:upload_error_message.png?direct&800| Figure 4}}^
+^{{:amc2020:group_n:upload_error_message.png?direct&800| Figure 5}}^
-|**//Figure 4//** Time out error during upload of code to the ESP32 DevkitC VB with the DHT-22 connected to it.|
+|**//Figure 5//** Time out error during upload of code to the ESP32 DevkitC VB with the DHT-22 connected to it.|
 This seems to be an issue caused by the power supply to the DHT-22 during the upload process. Other users reported to have fixed the problem by
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 Between the printing of the results (line 3, 4, 5) and the start of the next measurement process (line 6) a time difference of 2.04 seconds could be observed. 2 seconds are due to the delay in the main loop (code section 10), the rest is due to the print() functions which consume comparably much time.
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