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RS-485 Temperature Humidity Sensor (Sens (RS485 溫溼度感應器Modbus)

RS485 溫溼度感應器Modbus
RS-485 Temperature Humidity Sensor Modbus RTU
RS485 溫溼度感應器Modbus
Configuration
RS485 溫溼度感應器Modbus
SHT-20 Specification and option
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RS-422/485 Temperature and Humidity Sensor

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(Built in Sensirion SHT-20)

Report Mode:

1. Poll:

*RST: Reset

READ? : Read the sensor value

 

2. Auto: set by DIP switch on the rear side

1

2

3

4

5

6

7

8

9

Config

Format

Report

Base-1

Base-2

Time-1

Time-2

Time-3

Time-4

0: HW

1: SW

0: Raw

1: Tag

0: Auto

00: Second

01: Minute

10: Hour

11: Day

*Remark

0000:1  0100:5   1000:9    1100:13

0001:2  0101:6   1001:10   1101:14

0010:3  0110:7   1010:11   1110:15

0011:4  0111:8   1011:12   1111:16

*Remark

 

 

1: Poll

Poll the sensor value by the command set via RS-232 or RS-485, please check the command table. If you set the Modbus RTU command, the pin setting will indicate the Modbus ID: 1~64

The following string indicates the DIP No.: [4] [5] [6] [7] [8] [9]

000000:1  010000:17  100000:33  110000:49

000001:2  010001:18  100001:34  110001:50

000010:3  010010:19  100010:35  110010:51

000011:4  010011:20  100011:36  110011:52

000100:5  010100:21  100100:37  110100:53

000101:6  010101:22  100101:38  110101:54

000110:7  010110:23  100110:39  110110:55

000111:8  010111:24  100111:40  110111:56

001000:9  011000:25  101000:41  111000:57

001001:10  011001:26  101001:42  111001:58

001010:11  011010:27  101010:43  111010:59

001011:12  011011:28  101011:44  111011:60

001100:13  011100:29  101100:45  111100:61

001101:14  011101:30  101101:46  111101:62

001110:15  011110:31  101110:47  111110:63

001111:16  011111:32  101111:48  111111:64

 

Data format:

1. Raw: Byte 0~7

Temperature(SHT-20) 0x30 0x31 +:0x2b,-0x2d 0~F 0~F .0x2e 0~F 0~F
Humidity(SHT-20) 0x30 0x32 + 0~F 0~F      

RS-485 Modbus RTU: 9600,8-N-1

Read:

ID

Fucntion

Data

CRC16

1 Byte,0x01~0x7F

0x03

0x00

2 Byte

Response:

ID

Fucntion

Data Length

Data

CRC16

1 Byte,0x01~0x7F

0x03

0x04

4 Byte

2 Byte

 

 

2. RTLS

RTLS Tag Output Format:

$<msg type>,<reader id>,<tag type>,<tag id>,<battery>,<button>,<G-sensor>,<sensor>,<RSSI>#

Field

Description

$

start of report

msg type

Type of message ex. 0: general scanner, 1: tag scanner

reader id

6 bytes ID of reader in hex => 12 chars

tag type

type of tag ex. 1: tag w/o g-sensor, 2: tag w/ g-sensor ..

tag id

6 bytes ID of tag in hex => 12 chars

tag batt

batt voltage of tag in 1/10 volt unit

tag button status

button status ex. 0: released, 1: pushed

tag motion status

motion status ex. 0: non-moving, 1: moving

reserved

Reserved for external sensor data (11 bytes)

tag rssi

tag read rssi

#

end of report

 

example:

$1,E2C69918FD94,1,FFC98B7FC1A9,32,0,0,,-55#

$1,E2C69918FD94,1,FFC98B7FC1A9,32,1,1,,-55#

$1,E2C69918FD94,1,FFC98B7FC1A9,32,1,1,,-54#

$1,E2C69918FD94,1,FFC98B7FC1A9,32,1,1,,-63#

$1,E2C69918FD94,1,FFC98B7FC1A9,32,0,0,,-56#

 

 

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