Witura WT-9001 IP65 Specifiche Scaricare il pdf (Pagina 35)

the telephone number or by pressing a button on a GSM phone. Usually automatic, a

GSM modem can send DTMF-code using a separate PC or on a program that is

embedded in the microcontroller. GSM-relay unit has a connection hand free (HF) to be

connected to a Nokia phone with a 4 pin connector.

2.2.2.3 Block Diagram of Operation GSM-Relay 2009

From the discussion that has been done before, a summary of operations for the product

WT-9001 is very easy. This circuit used is too complex and difficult for consumers to

understand the detailed operation of the circuit. To facilitate understanding of the use of

the product WT-9001, a block diagram is included below.

Figure 2.14 Block Diagram Operation of GSM-Relay 2009 Probyte.

Phone Transmitter

DTMF Decoder

CPU Microcontroller

Electromagnetic Lock

Relay Driver

Phone Receiver

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Witura WT-9001 IP65 Specifiche Pagina 35