ESP8266 Community Forum

Getting this error:
"Error compiling for board Adafruit HUZZAH ESP8266"

I've followed the Adafruit set up guide, and successfully tested 'Blink' test and Connect to wifi test
here: https://learn.adafruit.com/adafruit-fea ... rduino-ide

Then I moved on to try out my first project: https://learn.adafruit.com/home-automat ... he-modules
I downloaded the GitHub code: https://github.com/openhomeautomation/a ... io-esp8266 for sensor_module. Followed along with guide, changing the appropriate wifi SSID and Adafruit IO username & key.

Arduino: 1.6.13 (Windows 8.1), Board: "Adafruit HUZZAH ESP8266, 80 MHz, 115200, 4M (3M SPIFFS)"

In file included from C:\Users\Rocketrob\Documents\Arduino\StrawEsp8266_sensor_module\StrawEsp8266_sensor_module.ino:20:0:

C:\Users\Rocketrob\Documents\Arduino\libraries\DHT-sensor-library-master/DHT_U.h:25:29: fatal error: Adafruit_Sensor.h: No such file or directory

#include <Adafruit_Sensor.h>

^

compilation terminated.

exit status 1
Error compiling for board Adafruit HUZZAH ESP8266.

This report would have more information with
"Show verbose output during compilation"
option enabled in File -> Preferences.