Description

I. Overview:

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

Code sending process: input ASCII code through serial port and then convert it to dual-tone multi-frequency code after receiving it by the module, and then convert it to audio signal and send it out through 3.5MM audio interface.

Code receiving process: It uses 3.5MM audio interface to convert the received audio signal into dual-tone multi-frequency code, and then converts it into ASCII code and sends it through the serial port.

The module can connect the input and output together with the audio cable, and send and receive data at the same time. The module can receive 30 serial ports at a time and wait for it to be sent.

2. Application:

● Remote device control;

● Dual-tone multi-frequency code decoding;

● Dual-tone multi-frequency code encoding;

3. Technical parameter table:

1 working voltage 5VDC

2 working current <10mA

3 Working temperature -40℃～65℃

4 Storage temperature -40℃～65℃

5 size 40*30*10mm length X width X height

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

(2) The input and output can be connected together with an audio cable, and data can be sent and received at the same time.

(3) The module can receive 30 data from the serial port at one time and wait for it to be sent.

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

5. Drive mode: serial port Communication format: baud rate 9600, no parity bit, 8-bit data, 1-bit stop

6. Scope of application: dual-tone signal decoding and encoding; remote control equipment.

7. Module interface:

(1) Communication interface P2:

5V: The positive terminal of the power supply (5V).

GND: Power ground interface.

RXD: the receiving end of the module; connect to the sending end TXD of the microcontroller (MCU)

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

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

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