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HUTX1-485
Temperature and Humidity Sensor
Revision V1.0
© Copyright 2023 IOThrifty LLC. All rights reserved. This document may not be copied, photocopied, reproduced, translated,
or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of
IOThrifty LLC
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Summary of Contents for IO Thrifty HUTX1-485
- Page 1 User Manual HUTX1-485 Temperature and Humidity Sensor Revision V1.0 © Copyright 2023 IOThrifty LLC. All rights reserved. This document may not be copied, photocopied, reproduced, translated, or reduced to any electronic medium or machine-readable form, in whole or in part, without the prior written consent of...
- Page 2 (SHT1x and SHT7x) in high humidity environments. Setting the Modbus address of HUTX1-485 is done via DIP switch, which avoids the need to set the address by computer or PLC. It is simple and convenient to maintain and replace.
- Page 3 Temperature measurement Sensing element SHT3X Working range -40 to 85℃ Resolution 0.1℃ Measurement accuracy ±0.2℃ Humidity measurement Sensing element SHT3X Working range 0 to 95%RH Resolution 0.1%RH Measurement Accuracy ±2%RH Hysteresis < ±0.8%RH Response time About 8s (from 33%RH to 75%RH, in flowing air) Long-term stability <±0.25%RH/year (under no pollution）...
- Page 4 RS485 wiring diagram Wire Note: When setting up an RS485 network, pay attention to the RS485 grounding to eliminate the common mode voltage. It is suggested to connect the common ground of each sensor together, and then connect it to the ground wire of the RS-232/RS-485 transverter.
- Page 5 RTU message frame format HUTX1-485 follows the Modbus RTU frame protocol. To ensure the integrity of the information, a pause time of 3.5 characters or more is required at the beginning and end of each frame (T1-T2-T3-T4), each byte of the information frame needs to be transmitted continuously.
- Page 6 Host request sensor information example (function code 03) Request data using function code 03 to read the temperature and humidity measurement value of the sensor and other information. The information frame format of the 03 code is as follows： Host request information frame Sensor response information frame Field Description Example...
- Page 7 Data explanation Temperature = 00FAH = 250 / 10 = 25.0℃； Humidity = 0258H = 600 / 10 = 60.0%RH； Reserved 1 = 0000H; Reserved 2 = 0000H; Address code = 0001H = 1; Baud rate = 2580H = 9600; Hardware version = 0600H; Software version = 000AH = 10 = V1.0;...
- Page 8 CRC check code Modbus RTU mode uses CRC-16 check, the check code occupies 2 bytes. If the check code is wrong, the sensor will ignore the host's request and not respond. The calculation method of CRC-16 check code is as follows: ①...
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Page 9: Warranty Terms
Warranty Terms IOThrifty LLC ("IOThrifty") warrants that for a period of one year following delivery, the IOThrifty products you have purchased will (a) perform in accordance with published specifications, and (b) will be free from defects in materials or workmanship. In the event an IOThrifty Product does not meet this warranty, subject to the conditions set forth in these terms and conditions, IOThrifty’s sole obligation will be, at its election, to repair or replace the product in question or to refund the purchase price.
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