Ranging Module Communication Protocol - Valueplus2 Electronics

Ranging Module Standard Communication Protocol

The standard communication protocol is applicable to all ranging module products of our company.

Function settings

1.1 Baud rate setting

1.1.1 Baud rate 9600bps setting

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x1	0xFF	0xFF	0xFF	0xFF	check code

Check code = byte 3+ byte 4+ byte 5+ byte 6+ byte 7

Return value:

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x1	Status	0xFF	0xFF	0xFF	check code

status=0x00，Baud Rate Setting Failed；

status=0x01，Baud Rate Setting Successfully

Note：The baud rate will not be changed immediately after setting. It will not take effect until restart.

1.1.2 Baud rate 115200bps setting

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x2	0xFF	0xFF	0xFF	0xFF	check code

Command = 0x1，Baud=115200bps

Check code = byte 3+ byte 4+ byte 5+ byte 6+ byte 7

Return value:

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x2	Status	0xFF	0xFF	0xFF	check code

status=0x00，Baud Rate Setting Failed；

status=0x01，Baud Rate Setting Successfully

Note：The baud rate will not be changed immediately after setting. It will not take effect until restart.

1.2 Infrared light turn-on and turn-off settings (this specification applies to all ranging modules with Infrared light )

1.2.1 Infrared light turn-on

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x04	0xFF	0xFF	0xFF	0xFF	check code

Return value:

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x04	Status	0xFF	0xFF	0xFF	check code

Status =0x0 Failed to turn on infrared indicator；

Status = 0x1，Successful Turning on Indicator

1.2.2 Infrared light turn-off

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x03	0xFF	0xFF	0xFF	0xFF	check code

Return value

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x03	Status	0xFF	0xFF	0xFF	check code

Status =0x0 Failed to turn on infrared indicator；

Status = 0x1，Successful Turning on Indicator

1.3 Display Open and Close Settings (this specification applies to all ranging modules with Display configuration)

1.3.1 Display Display Open Settings

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x06	0xFF	0xFF	0xFF	0xFF	check code

Return value

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x06	Status	0xFF	0xFF	OLED	0xED

Status =0，Failed to open the display screen；

Status =1，Successful opening of display screen

1.3.2 Display Close

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x05	0xFF	0xFF	0xFF	0xFF	check code

Return value

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x05	Status	0xFF	0xFF	OLED	0xED

Status =0，Failed to open the display screen；

Status =1，Successful opening of display screen

2 Functional operation

2.1 Single measurement command

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x88	0xFF	0xFF	0xFF	0xFF	check code

Return value

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x88	Status	0xFF	DATA_H	DATA_L	check code

Status = 0, single measurement failure;

DATA_H = 0xFF, DATA_L = 0xFF;

Status = 1, single measurement success;

DATA_H = high bytes of measurement results;

DATA_L = low bytes of measurement results

2.2 Continuous Measuring Command

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x89	0xFF	0xFF	0xFF	0xFF	check code

Return value

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x89	Status	0xFF	DATA_H	DATA_L	check code

Status = 0, multiple measurement failures;

DATA_H = 0xFF, DATA_L = 0xFF;

Status = 1, multiple measurement success;

DATA_H = high bytes of measurement results; DATA_L = low bytes of measurement results

2.3 Angle measurement command

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x8A	0xFF	0xFF	0xFF	0xFF	check code

Return value

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x8A	Status	0xFF	0xFF	DATA	check code

Status = 0, angle measurement failure; DATA = 0xFF;

Status = 1, angle measurement success; DATA = angle data

2.4 Speed measurement command

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x8B	0xFF	0xFF	0xFF	0xFF	check code

Return value

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x8B	Status	0xFF	DATA_H	DATA_L	check code

Status = 0, speed measurement failure;

DATA_H = 0xFF, DATA_L = 0xFF;

Status = 1, speed measurement success;

DATA_H = high bytes of measurement results; DATA_L = low bytes of measurement results

2.5 Altimetry command

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x8C	0xFF	0xFF	0xFF	0xFF	check code

Return value

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x8C	Status	0xFF	DATA_H	DATA_L	check code

Status = 0, single measurement failure;

DATA_H = 0xFF, DATA_L = 0xFF;

Status = 1, successful single measurement;

DATA_H = high bytes of measurement results;

DATA_L = low bytes of measurement results

2.6 Horizontal Distance Measuring command

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x8D	0xFF	0xFF	0xFF	0xFF	check code

Return value

Byte1	Byte 2	Byte 3	Byte 4	Byte 5	Byte 6	Byte 7	Byte 8
0x55	0xAA	0x88	Status	0xFF	DATA_H	DATA_L	check code

Status = 0, horizontal distance measurement failed; DATA_H = 0xFF, DATA_L = 0xFF;

Status = 1, successful horizontal distance measurement; DATA_H = high bytes of measurement results; DATA_L = low bytes of measurement results

Note: Data is returned in hexadecimal system. All data results multiply real data by 10.

Example: dist = 2000.3m, output data for 2003, conversion to 16-digit 4E23, that is, Data1 = 0x4E, Data2 = 0x23.

The Data of Angle and Velocity are the Same