Error: Adafruit_Sensor.h: No such file with Arduino IDE (DH11) compile error

I want to use DH11 ,but compile  error.

In file included from
C:\Users\username
\Documents\Arduino\libraries\DHT_sensor_library\DHT_U.cpp:22:0:
C:\Users\username\Documents\Arduino\libraries\DHT_sensor_library\DHT_U.h:25:29: fatal error: Adafruit_Sensor.h: No such file or directory
 #include <Adafruit_Sensor.h>

You have to install "Adafruit Unified Sensor" library with arduino library manager.Maybe can fix this problem.

If you still have this problem.

you can add "#include <Adafruit_Sensor.h>" in code.

Fix arduino "exec: "cmd": executable file not found in %PATH% "

compiling code with Arduino IDE. I get a error "exec: "cmd": executable file not found in %PATH% "

PATH add %SystemRoot%\system32;%SystemRoot%;C:\Windows\System32;

How to use NodeMCU-32S Lua (ESP32) serial2 port (UART)

 NodeMCU-32S Lua have 3 UART. serial0 ,serial1, serial2.

serial	RX	TX
0	GPIO3	GPIO1
1	GPIO9	GPIO10
2	GPIO16	GPIO17

If ESP32 connect USB,only serial2 can work.