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Return to BlogSMS Controlled Light Tower
Posted Jan 26, 2012 at 9:30 am
Figure 1
The project illustrates the use of SMS message to remotely produce cool effects by switching lights.
The device includes Wavecom GSM module and a light tower with red, yellow, green, and blue color lamps. If needed, they can be purchased on Ebay with lower prices. The light tower is similar to those industrial tubes with stacked lights to indicate machine status based on colors just like a street light. The Wavecom WMOi3 old GSM module was used as a cheap SMS terminal.
Light bulbs were used in the project since the tower is not based on LEDs. Because of this, the light bulbs were controlled through Opto22 board with 12V optical switches to allow safely controlling of 12V bulbs. The brain of the system is the AT90S2313 that runs with a simple firmware wherein SMS text is parsed which turns ON or OFF various pins that control the Opto22 TTL switches. The high current light bulbs will then be controlled by the switches.
The software was written using WinAVR compiler for Atmel risk CPUs. In the source code, the transmission and reception circuitry were turned ON. The device does nothing unless data is received.
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