1. Communication interface
RS485
Communication serial port configuration: 8Number of digits, 1Stop position, No verification, Baud rate: 9600bps
Communication protocol: MODBUS RTU
Support instructions: 0X03 0X06 0X10
2, 485Communication protocol
Read device address communication commands:
Command format sent by the upper computer:
| Fixed code | Function code | Fixed code | CRCVerification code |
| 0x01 | 0x2A | 0x01 | 0xXXXX |
Lower machine (Equipment) Response command format:
| Fixed code | Function code | Equipment address | CRCVerification code |
| 0x01 | 0x2A | 0xXX | 0xXXXX |
Read single/multiple register data command: 0x03
Command format sent by the upper computer:
| Equipment address code | Function code | Register starting address | Number of registers (One) | CRCVerification code |
| 0xXX | 0x03 | 0xXXXX | 0xXXXX | 0xXXXX |
Lower machine (Equipment) Response command format:
| Equipment address code | Function code | Data length (Byte count) | Register value | CRCVerification code |
| 0xXX | 0x03 | 0xXX | 0xXXXX…… | 0xXXXX |
Write a single register data command: 0x06
Command format sent by the upper computer:
| Equipment address code | Function code | Register address | Register value | CRCVerification code |
| 0xXX | 0x06 | 0xXXXX | 0xXXXX | 0xXXXX |
Lower machine (Equipment) Response command format:
| Equipment address code | Function code | Register address | Register value | CRCVerification code |
| 0xXX | 0x06 | 0xXXXX | 0xXXXX | 0xXXXX |
Write single/multiple register data commands: 0x10
Command format sent by the upper computer:
| Equipment address code | Function code | Register starting address | Number of registers (one) | Data length (byte count) | register value | CRCchecksum |
| 0xXX | 0x10 | 0xXXXX | 0xXXXX | 0xXX | 0xXXXX…0xXXXX | 0xXXXX |
lower computer (device) response command format:
| device address code | function code | register starting address | register quantity (number of registers) | CRCchecksum |
| 0xXX | 0x10 | 0xXXXX | 0xXXXX | 0xXXXX |
description:
1) data length represents the total number of bytes of valid data in the register, i.e.: data length = number of registers x 2
2) communication process, all data is high byte first, low byte last, CRC checksum is low byte first and high byte last
register description!
register address:
| function | register value range | byte (2status description) | property | spare note | fresh air fan address |
| 0x0000 | address | 0x0000-0x00FF | 1-247address | read | default1 |
| 0x0001 | indoorPM2.5value | 0-999 | read | ||
| 0x0002 | indoorCO2value | 0-2000 | read | ||
| 0x0003 | reserved | reserved | read | ||
| 0x0004 | indoor temperature | read temperature value):0℃~99℃Temperature value | Read | ||
| 0x0005 | Indoor humidity | 0—99%RH;Read humidity value | Read | ||
| 0x0006 | Outdoor temperature | Reserved | Read temperature value: Bit7:0Positive temperature; 1Negative temperature; bit6-bit0:-9℃~99℃Temperature value | Read | 0xffNo data |
| 0x0007 | Outdoor humidity | Reserved | 0—99%RH;Read the humidity value | Read | 0xffNo data available |
| 0x0008 | OutdoorPM2.5Value | reserve | 0-999 | Read | 0xffffNo data available |
| 0x0009 | Filter usage time | 0-9999 | Hour(hour) | Read | |
| 0x000A | IndoorPM10Value | 0-999 | Read | ||
| 0x000B | reserve | reserve | reserve | Read | |
| 0x000C | reserve | reserve | reserve | Read | |
| 0x000D | reserve | reserve | reserve | Read | |
| 0x000E | reserve | reserve | reserve | Read | |
| 0x000F | reserve | reserve | reserve | Read | |
| 0x0010 | power switch | 0x0000 0x0001 | 0x0000 Shut down 0x0001 Power on | Read/write | |
| 0x0011 | Fresh air working mode | 0x0000
0x0001 0x0002 | 0x0000 Manual mode
0x0001 Automatic mode 0x0002 Timed mode | Read/write | |
| 0x0012 | Air valve | 0x0000
0x0001 | 0x0000 Close the valve
0x0001 Open the valve | Read/write | |
| 0x0013 | Manual mode wind speed | 0x0000
0x0001 0x0002 0x0003 | 0x0000 stop it
0x0001 Low speed 0x0002 Medium speed 0x0003 High speed | Read/write | |
| 0x0014 | reserve | reserve | reserve | Read/write | |
| 0x0015 | Reset the running time of the filter screen | 0x5AA5 | data Write: Write0x5AA5Clear the working time of the filter screen, Other invalid | Write |
Manufacturer information:
JIANGSU HOODSON ENVIRONMENTAL TECHNOLOGY CO.,LTD
Add: Liusan Road, Wujin District, Changzhou City, Jiangsu Province88number
E-mail: china@hoodson.com.cn
Tel: 400-887-9952
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