Temperature-Humidity Sensor User Manual
Contents
1. 3 wg supply 3 3V 5 5V Table 2 Interface specification Temperature Humidity Sensor User Manual Waveshare 4 How to use We will illustrate the usage of the module with an example of temperature humidity measurement by connecting a development board Download relative codes to the development board 2 Connect the development board to a PC via a serial wire and the module to the development board Then power up the development board and start the serial debugging software The configuration of the connection between the module and the development board are shown in Table 3 and Table 4 Port STM32 MCU pin DOUT GPIOA 0 GND GND VCC 3 3V Table 3 The connection between STM32 development board and DHT11 Port Arduino pin DOUT D2 GND GND VCC 5V Table 4 The connection between Arduimo and DHT11 The configuration of the serial port is listed in Table 5 Baud rate 115200 Data bits 8 Stop bit 1 Parity bit None Table 5 Serial port configuration Run the serial debugging software then you can see relative data of humility and temperature are outputted For example Humidity 33 Temperature 282. Temperature Humidity Sensor User Manual Waveshare Temperature Humidity Sensor User Manual 1 Features Sangoi DHT11 Temperature amp humidity sensor Operating voltage 3 3V 5 5V Humility measuring 20 95 0 C 50 C range Humility measuring 1 5 error Temperature 0 C 50 C measuring range Temperature 42 C measuring error Dimensions 29 0mm 18 0mm Fixing hole size 2 0mm Table 1 Product features Operating principle DHT11 Digital Temperature amp Humidity Sensor is a temperature humidity compound sensor with calibrated digital signal output The sensor includes a resistive humidity sensing component and a NTC temperature sensing component Each DHT11 sensor is calibrated in an extremely accurate humidity calibration chamber The calibration coefficients are stored in the OTP memory in the form of programs and these calibration coefficients are called during the internal signal detection process of the sensor so that there is no need to recalibrate them The single wire serial interface provides easy and fast system integration lts smart size low power consumption and signal transmission distance up to 20 meters makes it an ideal option in various applications 2 Applications This module can be applied to environmental temperature amp humility measurement 3 Interfaces Pin No Symbol Descriptions 1 DOUT Communication port 2 GND Power ground Positive power
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