Temperature and Humidity Module （Model No.ZS03） Zhengzhou Winsen Electronics Technology Co

Statement This manual copyright belongs to Zhengzhou Winsen Electronics Technology Co., LTD. Without the written permission, any part of this manual shall not be copied, translated, stored in database or retrieval system, also can’t spread through electronic, copying, record ways. Thanks for purchasing our product. In order to let customers use it better and reduce the faults caused by misuse, please read the manual carefully and operate it correctly in accordance with the instructions. If users disobey the terms or remove, disassemble, change the components inside of the sensor, we shall not...

ZS03 Temperature and Humidity Module Profile ZS03 is digital type of temperature and humidity module. It employs polymer resistance-type moisture sensor and NTC, and matches SCM with good performance. It has advantages of high quality, quick response, strong anti-interference &etc. Features Low cost Low power consumption Small sizes Single wire serial interface High sensitivity Calibrated, digital output Application Storage, industrial production, process controlling, environment monitoring, household appliances, meteorological field Parameters Table 1. Part No. Detection Object Relative humidity,...

www.winsen-sensor.com Structure Pins definition 1．VCC Power supply 3.3～5.5V DC 2．DATA Serial data, unibus 3．NC NULL (hang in the air) 4．GND ground, power negative Email: sales@wins

www.winsen-sensor.com Typical circuit Fig3 Application circuit Serial Port (Bidirectional Single Line ) DATA is used to communicate and synchronize between microprocessor and ZS03, it adopts unibus data format, one communication takes about 4ms, data includes fractional part and integral part, one complete data transportation has 40 bits, high bits first. Data format: 8 bit humidity integral data+ 8 bit humidity decimal data +8 bit temperature integral data + 8 bit temperature decimal data +8 bit checksum If data transportation is correct, checksum is equal to the end 8 bits of the value of “8...

www.winsen-sensor.com pull up the bus high level for 80us, ready to send data, every bit data starts at 50us low level, length of high level decides the data bit is either 0 or 1. If response signal is high level, it indicates the sensor doesn’t response, please check the circuit is normal or not. After the last bit data is sent, the sensor pulls down the bus for 50us, then the bus is pulled up by pull-up resistor to idle state. Number 0 signal is showed by Fig5. 26us-28us Indicates "0" Signal line description ZS03 Signal Host Signal Fig5：How to show number 0 signal Number 1 signal is showed...

www.winsen-sensor.com Examples: Example1： the received data of 40 bit as follow： 00110111 00000000 00010010 00000000 01001001 high 8 bits of humidity, low 8 bits of humidity, high 8 bits of temperature, low 8 bits of temperature, check bit Determine whether the temperature is positive or negative: Judging the highest digit of the 8-bit lower temperature, if the highest digit of the 8-bit lower temperature is "1", then the temperature is judged to be a negative value, and a minus sign is added before the value when outputting the temperature value, if the highest digit of the 8-bit lower temperature...

The received data is correct： humidity： 00110111 = 37H = 55%RH temperature： 00010010 = 12H = -18℃ Note: Since the water vapor below zero will exist in the form of ice crystals, only the temperature can be tested when the temperature is below zero, and the humidity data is inaccurate. Suggestions for application 1.If connecting cable length is shorter than 20 meters, 4.7K pull-up resistor is necessary; if it is longer than 20 meters, the pull-up resistor should be reduced according to the actual situation. 2. When using 3.3V voltage power supply, cable length is recommended not longer than 100CM,...