Update README.md

README.md

@@ -22,11 +22,19 @@ Then reboot the Raspberry Pi.
 
 Make sure that PHP, PHP-cURL and Git is installed on the Raspberry Pi.
 
-Then clone the files from this project to `/home/pi/sensor` using the following command;
+Then clone the files from this project to `/home/pi/sensor` using the following command:
 ```
 git clone http://git.zsinfo.nl/CHMonitor/DS18B20.git /home/pi/sensor
 ```
 
+Edit the sensorId and apiKey values in the `updateSensor.php` file to the values supplied to you on the CH Monitor panel.
+
+Test if the script finds the temperature sensor by running the following command. Exit the script using `ctrl + c`
+```
+php /home/pi/sensor/updateSensor.php
+```
+
+
 and add the following crontab using `sudo crontab -e`.
 ```
 @reboot php /home/pi/sensor/updateSensor.php