GSM Switch is a project to turn on or turn off electrical appliances such as light switching home or anywhere remotely via GSM.
How to turn on equipment by sending SMS '1111' ON 'and switch off the equipment by sending SMS' 0000 GSM Switch will receive instructions either load 1 (L1), load 2 (L2), load 3 (L3) or load 4 (L4). Then the GSM Switch will send the four load status is ONor OFF either. Skematiknya are as follows
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