Smart mailbox system
A letter box, intelligent technology, applied in the direction of time registers, instruments, other household appliances, etc., can solve the problems of lost letters, lost keys, blocked lock holes, etc.
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[0025] The specific embodiments of the present invention will be further described below in conjunction with the accompanying drawings.
[0026] Such as figure 1 As shown, the circuit of the present invention includes: a single-chip microcomputer control module, an infrared sensing module, a radio frequency identification unlocking module, a buzzer alarm module, an LED display module, an independent power supply module, and a GSM communication module; When it is blocked, a letter is delivered to the mailbox, the infrared receiving tube D1 cannot receive light normally, the output level signal is 0, and the single-chip microcomputer The external interrupt triggers the MCU program accordingly, and realizes the hexadecimal encoding of the received information number, with two digits reversed. If the last digit of the number is an odd number, add F to the high digit. Through the Chinese_Unicode.exe file, the content of the short message is converted into Chinese; the GSM communi...
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