Product Name: | Seven-in-one air quality detector |
Product model: | MAQ01020406070914-S-P2 |
Version: | V1.0 |
Formulator: | He Genwen |
Reviewer: | Yuan Chao |
1. Product Description
Seven-in-one air quality detector 是一款高性价比的数字信号 Output 传感器产品，采用 RS485 Output model ，集 CO2 、formaldehyde 、TVOC、 Laser dust PM2.5/PM10 颗粒物、temperature 、湿 度传感器于一体。可对所处环境进行实时全面检测，具有良好的稳定性，非常方 便客户使用。
2. Application areas
● Hotel room air quality monitoring
● Fresh air ventilation system
● Air purifier, air conditioner
● Air quality monitoring equipment
● Kitchen and bathroom ventilation control system
● Smart home devices
3. Product Features
● 同时 Output CO2 、 formaldehyde 、TVOC、PM2.5、PM10、temperature 、humidity 七组data
● 灵敏度高，data 稳定
● RS485 Output
● temperature 分辨率 0.1℃ ，humidity 分辨率 0.1%RH
● Fastest pass in 0.5 seconds RS485 信号 Output 七组传感器监测data
4. Range accuracy
Category | Measure resolution | Measurement range | Measurement accuracy |
CO2 | 1ppm | 400ppm~5000ppm | ±50ppm+5%reading |
formaldehyde | 1ug/m3 | 0ug~1000ug/m³ | ±25% |
TVOC | 1ug/m3 | 0ug~2000ug/m³ | ±25% |
PM2.5 | 1ug/m3 | 0ug/m3~999ug/m³ | ±10% |
PM10 | 1ug/m3 | 0ug/m3~1000ug/m³ | ±10% |
temperature | 0.1℃ | -20℃~60℃ | ±0.5℃ |
humidity | 0.1%RH | 5~95%RH | ±5%RH |
V. Technical parameters
Terminals | communication: RJ45 interface ，供电：DC Power Hole |
Output signal | RS485 |
Operating voltage | 5.0±0.2VDC |
Average operating current | ≤80mA |
Warm-up time | 2 minute (formaldehyde 和 TVOC It needs to be preheated and stable, and other parameters are displayed when powered on ) |
Operating temperature | 0℃~50℃ |
Working humidity | ≤95％RH |
External dimensions | Diameter 168 mm， High 51 mm |
Service life span | 3 Year |
六、interface 定义
interface | name | Function |
1 | RJ45 6th foot | RS485A |
2 | RJ45 8th foot | RS485B |
3 | Power Hole | Connect to the power supply 5 VDC |
6. Appearance and size drawing
7. Things to note
Preheat for 2 minutes for the first time
Do not place this module in high concentration organic gases and corrosive gases for a long time
Do not install the module in a strong convection gas environment for use
Avoid contamination of large dust particles such as ground dust, floating flocs and even flocs, causing the fan to be entangled and blocked.
Proposed to use equipment to take appropriate pre-filtering treatment
Users must not disassemble the sensor, including metal shielded shells, to prevent irreversible damage.
This sensor is suitable for ordinary indoor environments
eight, RS485 Communication protocol
1、RS485 Communication Agreement Overview
通信协议详细地描述了Seven-in-one air quality detector 入和 Output 命令、信息和data ，以便第三方使 用和开发。
物理interface ：
Connect to the main communication port of the upper computer, using standard serial RS-485 Communication port.
信息传输方式为异步方式，起始位 1 位，data 位 8 位，停止位 1 位，无校验。 data 传输缺省速率为 9600b/s
2、Detailed description of communication protocol
2.1 Communication method
1) All loop communications should comply with the main /从方式。在这种方式下，信息和data 在单个主站和从站 (Monitoring equipment ) Pass between.
2) Supports broadcast mode.
3) No communication can be started from a slave station anyway.
4) If the master or any slave receives a package containing an unknown command, the package will be ignored and the receiving station will not respond.
2．2 返回data 帧结构描述
每个data 帧组成如下： (RTU model )
address
Function 代码
data 数量
data 1
...
data n
CRC 16 Position verification
3、Transfer format
1) 主机发送读address 命令：
address | Function 码 | 寄存器address High | 寄存器address Low | data 个数 High | data 个数 Low | CRC 16 Position verification |
00 | 03 | 01 | 00 | 00 | 01 | Xxxx Low 在前 |
从机返回address ：
address | Function 码 | Byte length | address High | address Low | CRC 16 Position verification |
00 | 03 | 02 | 00 | xx | Xxxx Low 在前 |
Example: Send: 00 03 01 00 00 01 84 27
Response: 00 03 02 00 addr CRCL CRCH like addr=2 则读取的传感器address 为 2
2) 主机发送读data 命令：
address | Function 码 | data 起始地 址 High | data 起始地 址 Low | 返回data 个数 High | 返回data 个数 Low | CRC 16 Position verification |
( 目前仅支持读取所有data ，从address 0002 开始，读取 7 个data 值) ,只有 7 个传感器data , 对应 7 个传感器address ,data 起始address High 永远为 0,返回data 个数 High 永远为 0.
Internal message information
起始address | data 个数 | illustrate |
It can only be as follows: |
|
|
0x0002 | 1 | CO2 concentration |
0x0004 | 1 | formaldehyde concentration |
0x0006 | 1 | TVOC concentration |
0x0008 | 1 | PM2.5 concentration |
0x000A | 1 | PM10 concentration |
0x000C | 1 | temperature 值 |
0x000E | 1 | humidity 值 |
起始address 只能用以上列表中的address ,否则不回应.data 个数如果超出,也不回应,比如,起始地 址 0X000C,可以返回的data 个数只可能是 1 或 2,如果要回 3 个data 则不回应.同理,address 0X000E,返回data 个数只能是 1.返回data 个数 0,也不回应。
Slave sensor return value:
Slave address | Function 码 | data 个数 | data N | CRC |
XX | 03 | xx | xx | xxxx |
Byte length 仅指data 长度。
N0 | N1 | N2 | N3 | N4 | N5 | N6 | N7 | N8 | N9 | N10 | N11 | N12 | N13 |
CO2 High | CO2 Low | formaldehyde High | formaldehyde Low | TVOC High | TVOC Low | PM2.5 High | PM2.5 Low | PM10 High | PM10 Low | temperature High | temperature Low | humidity High | humidity Low |
Example: Host sends 01 03 00 02 00 07 CRCL CRCH
Response: 01 03 0 E 02 26 00 26 00 34 00 0E 00 11 01 1C 02 5D CRCL CRCH
