1pc Dual Tone Multi-Frequency DTMF Signal Decoding and Encoding Module

Parameter:

I. Overview.

DTMF V1 is a dual-tone multi-frequency decoding and encoding module.

The sending process: ASCII code is input through the serial port and received by the module, then converted into dual-tone multi-frequency code, and then converted into a universal frequency signal sent through the 3.5MM audio interface.

Receiving code process: the 3.5MM audio interface is used to convert the received green frequency signal to dual-tone multi-frequency code, and then converted to ASCII code through the serial port.

The module can use the audio cable to connect the input and output together, at the same time send data and receive data. The module can receive serial port 30 data waiting to be issued at a time

Application: ● Remote device control.

Remote device control

Dual-tone multi-frequency code decoding

Dual-tone multi-frequency code encoding

Technical Parameter Table.

Working voltage: 5VDC

Working current:<10mA

Working Temperature: -40℃ ~65℃

Size: 40*30*10mm length*width*height

4、Features:

(1)Receive and send data through the serial port.

(2)You can connect the input and output together with audio cable to send and receive data at the same time.

(3) The module can receive 30 data from the serial port at a time and wait for sending.

(4) The received data is sent out through the serial port instantly.

5, drive mode: serial port communication format: baud rate of 9600, no parity bit, 8-bit data, 1-bit stop

6、Applications:dual tone signal decoding and encoding;remote control equipment.

7、Module Interface.

(1)Communication interface P2 .

5V: power positive interface (5V)

GND :Power ground interface

RXD :Receiving end of the module; connected to the microcontroller (MCU) transmitter TXD

TXD: Transmitter of the module; connected to the microcontroller (MCU) receiving end RXD

(2) Signal input interface J1: is a 3.5MM audio input interface

(3) Signal output interface J2: is a 3.5MM audio output interface

Note: Please do not connect the circuit module directly with the computer's serial port, through the (RS232 to TTL module) to convert the signal into a TTL level signal can be connected with the circuit module, otherwise it will damage the module. (RS232 signal is -15 volts to +15 volts, TL232 signal is 0 volts to +5 volts)

Note: Check that the circuit wiring is correct before powering up. Reversing the power supply will burn the circuit.

Package:

1pc Dual Tone Multi-Frequency DTMF Signal Decoding and Encoding Module