Update README.md

README.md

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 # AirMonitor
-A python program that sends emails when the AQI has passed a specified threshold 
+A python program that sends emails when the AQI has passed a specified threshold.
+
+Tested with an sds011 sensor on a raspberry pi zero w.
+
+More information on the sensor can be found here: https://aqicn.org/sensor/sds011/
+
+**Dependencies**
+- Python
+- python-aqi (install via pip)
+- pyserial (install via pip)
+
+**Usage**
+1. Plug the air monitor in a usb port
+2. Confirm that the usb device in the airMonitor.py is correct, and change if needed.
+3. Configure email settings. (emailPassword, emailSender, smtpServer, emailPort, emailReceiver)
+4. Configure other settings as needed. (emailTimeout, aqiThreshold)
+5. Install dependencies `pip install python-aqi pyserial`
+6. Mark the program as executable `chmod +x airMonitor.py`. (Note: skip this step on windows)
+7. Run airMonitor.py `./airMonitor.py`. (Note: on windows run `python airMonitor.py`)