Pins and Interface definition
Pin Name | Description |
5V | Power supply by 3.3-5.2VDC ,3.7V and above recommended |
GND | Reference Ground |
RXD | UART RX |
TXD | UART TX |
Electrical Characteristics
Parameters | Pin | Range | Unit | |
Power | 5V | 3.3-5.2 | V | |
Digital I/O | TXD, RXD | High level | 2.7-3.3 | V |
Low level | 0-0.3 | V |
Product size
Testing steps
1、Install a TF card that audio files have been inside; Connect CX-SP5T to a computer by an USB to TTL module
(CX-340 recommended); connect 5V、TXD、RXD、GND; TX and RX are cross connected;
2、Start the serial debugging tool APP, and finish settings。Set the baud rate of the serial port to 9600.
Note:1)Can be supplied by 5VDC that USB to TTL module output. it is not available that supply by USB
port of computer, because it will work in download mode, while connecting to computer by USB cable
Change voice files
Install a TF card , connect CX-SP5T to a computer by a USB cable, it will show a USB flash drive,copy voice
files(mp3) into it
Note:Voice files must be renamed by five number such as 00001.mp3, 12345.mp3 …… 65535.mp3
Protocol of UART
Settings of UART:Start:1bit;Data:8bits;Stop:1bit;Check:None;Baud Rate:9600.
1.Formate of protocol
Start | Length | Device ID | CMD | Data | Sum Check | End |
0xFE | 1 byte | 2 bytes | 1 byte | 0-n byte | 1 byte | 0xBE |
Start:1 byte,fixed FE。 Length:1 byte,the number of all bytes
Device ID:2 bytes,High byte first, low byte last. 0xFFFF is the broadcast,available to all
devices. Range of device ID is 0~65534,Default device ID is 0x0001
CMD:1 byte, CMD code.
Data:0~n byte,High byte first, low byte last.
Sum Check:1 byte,the low 8 bits of all bytes sum.
End:1byte, fixed BE.
2.CMD SPEC
Please download the“CX-SP5T developer kit”for detailed description
China (Mainland)
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