diff --git a/18_dht11/README.md b/18_dht11/README.md
index 2c80553..bcae15f 100644
--- a/18_dht11/README.md
+++ b/18_dht11/README.md
@@ -1,23 +1,18 @@
-- esp-idf:
-
-
-wired up:
+- esp-idf: branch `release/v4.2` , commitId `cd4fa46f5372a552a67452313d246d4d09d2b39f`
+- build ways: Windows10 CMake
+- origin dev by: https://github.com/hamsternz/thingspeak-esp32-dht11
 =========
+## ESP32 C SDK 驱动 DHT11 获取温湿度
 
 ```
 DHT11      ESP32
 VCC   ---> VIN
-DATA  ---> D4
+DATA  ---> GPIO4
 GND   ---> GND
 ```
 
 DHT11 with input 3~5.5v
 
-origin dev by samrjohnston
-https://github.com/samrjohnston/ESP32Projects
-
-but his project is full of mistake;
-
 Output:
 =======