Job title : Cell sites remote monitoring system
Client : CAT - Scan Energy Co., Ltd.
Responsible: Project leader, Design-coding.
Date: October 2006

Abstract:

• Over view: Telecom shelter for cellular telephone cell sites in Thailand are suffering from heat and humidity. To maintain reliability of a cell site circuitry, three air-conditioner are brought in and set to run eight hours per unit in circle. Electric consuming and maintenance cost of cell sites’ air-conditioners generate major expense.
• Approach: Since most upcountry cell sites are located in remote area. Access to those shelter are time consuming and expensive. To minimize on site visit for scheduled checking. The shelter temperature and humidity must be carefully monitoring. Also unusual electric consumption of the air-con must be aware.
• Development: I designed a special microcontroller circuitry to captures temperature, humidity and electric consumption data. Utilize the RS-232 interface and a PC running Windows + NET Framework to collect data and record in the off-line MS Access database. These data then automatically sent to Internet and stored in MS SQL Server every ten seconds interval.

* Server-side programs are written in C# to allow user from  anywhere in the world to access and monitor the cell site status. Client-side script written in  JavaScript to produce streamline information updating (AJAX using XML to interchange data with C# server-side script) also featuring real-time graph on web browser.
* Information can be export to MS Excel for off-line analysis. On-line analysis also possible include line chart. Program has been test and work well in both Internet Explorer and Mozilla Firefox web browser.

Status: On-line

Key technology: ASP.NET 2.0, C#, JavaScript, AJAX, XML, MS-SQL Server, Micro controller PIC and C language.
Reference web link: http://www.scanenergy2.com/ScanEnergy/Scan1.aspx?id=002
See also : I wrote a shrot article about this system in my Blog. It’s in Thai, but you may find some pictures and code are interesting.
http://thai-cs.spaces.live.com/blog/cns!4D52C1812766D2D7!709.entry

Blog diagram of the secsor circuit

Screen capture of the new version with remote access a/c and fan control

Inside the telcom shelter

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