The GSM/GPRS monitoring unit is an optional add-on to the 32-Bit ARM based Traffic Signal Controller. On one hand, the GSM/GPRS monitoring unit independently monitors certain critical parameters of the Traffic Signal like
Presence of AC (Mains) voltage
Detection whether signal is working on Mains supply or Solar backup
Detection of partial / full failure of the signal post
And on the other hand it interfaces directly to the Traffic Signal Controller via serial communication enabling the monitoring and updating of parameters like:
Date and time of RTC
Data log of traffic Signal Controller
Current status of TSC (i.e. whether the signal in Auto or Manual / Police control mode etc.)
All these parameters are updated to the central server by the GSM/GPRS monitoring unit which can be viewed / updated by the authorized users via a web based interface from any computer having an internet connection.
In case of any alarm event (like overload, absence of mains voltage for certain amount of time, failure in signal etc.), the system automatically sends alarm e-mails to pre-defined users so that corrective action may be taken. The access to web based interface is completely secured using user level passwords.