Dual tone multi-frequency DTMF signal decoding and encoding module
1, Working voltage: 5V
2, Working current: 10MA
3, Size: (length) 40mm * (W) 30mm * (height) 10mm
4, features: (a) receive and send data through the serial port.
(2) can be used to input and output audio cable connected together, and send data and receive data.
(3) modules can once receive serial data waiting to be issued 30.
(4) immediate data received through the serial port to send out.
5, drive: Serial port communication Format: 9600 baud, no parity, 8 data bits, 1 stop
6, Application: two-tone signal decoding and encoding; remote control devices.
7, the module interface:
(1) Communication interface P2:
5V: power positive Interface (5V).
GND: Power ground interface.
RXD: module receiving end; connected microcontroller (MCU) sender TXD
TXD: module sender; connected microcontroller (MCU) receiver RXD
(2) signal input interface J1: yes 3.5MM audio input interface.
(3) signal output interface J2: yes 3.5MM audio output interface.
Note: Check through the circuit wiring is correct, to power. Power reversed the circuit will burn