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GY-21P Module Features The GY-21P module consists of two sensors, BMP280 and SI7021, which include pressure, temperature and humidity sensors. The communication protocol of this module is I2C. This module is capable of measuring air pressure from 30,000Pa to 110,000Pa, measuring humidity from 0 to 100%, measuring altitude from 0 to 30,000 feet and measuring temperature from -40 to +85 degrees Celsius. You can download the datasheet of this module here. [wpdm_package id='17363'] [wpdm_package ...

IR Flame Sensor Features The flame sensor is actually an infrared receiver. In this module, the output of the infrared receiver is measured using a comparator IC. If the fire and flame (or any other infrared source) is close to the sensor, the output of the comparator is LOW, otherwise the output is HIGH. Note There is a potentiometer on board to change the sensor's sensitivity. In practice, this potentiometer changes the reference voltage of the comparator IC (the same voltage that the sensor voltage is co...

LM75 Temperature Sensor Features LM75 is a temperature sensor that can measure temperature range from -25 to +125 degrees Celsius. This sensor support I2C communication protocol and you can communicate with this module using two SDA and SCL pins to read the ambient temperature. You can download the datasheet of this module here. [wpdm_package id='17386'] LM75 Temperature Sensor Pinout This sensor has 5 pins:  VCC: Module power supply – 3.3-5 V  GND: Ground  SDA: Data pin...

BIOVO-C3 Fingerprint Module Features BIOVO-C3 optical fingerprint module is a high-precision, high-performance matching algorithm and high-capacity flash chip. It works based on fingerprint image processing, matching, memory search and performance and desired functions. It uses serial communication in order to communicate with microcontroller. The default Baud Rate is 57600, and it can not be changed. It can store up to 200 fingerprint samples and you can directly connect it to a computer via USB. ...

KY-031 Knock Module Features This module is a spring-based sensor that sends a HIGH signal when a vibration is detected. It can be widely used in security systems, or monitoring. You can easily use it with the Arduino board or any other microcontroller. Tip It is recommended to use microcontroller interrupt pins in order to increase accuracy. You can download the datasheet of this module here. [wpdm_package id='17426'] KY-031 Knock Module Pinout This sensor has 3 pins:  VIN: Module power...

MMA7361 Accelerometer Module Features The MMA7361 is a 3-axis accelerometer with ± 1.5g to ± 6g measuring range. You do not need a library and complex code to use MMA7361 accelerometer. In this module, there is an analog output voltage for each axis acceleration. As a result, you can read and analyze sensor's outputs using an analog-to-digital converter. You can download the datasheet of this module here. [wpdm_package id='17442'] The output voltage for each axis of this module is as follows...

MPU9250 + BMP280 Module Features This module combines a 9-axis MPU8250 IMU and a BMP180 atmospheric pressure sensor. Therefore you have a 10DOF sensor in one place! It can communicate with arduino or any other microcontroller via I2C protocol. Using FreeIMU functions and source code, you can easily build an AHRS system to use in UAVs, VTOLs, model airplanes, etc. You can also use it in industrial, medical, ... devices. MPU9250 + BMP280 Module Pinout This sensor ha...

MPS20N0040D Pressure Module Features The MPS20N0040D Pressure and Altitude Sensor Module is an MPS20N0040D pressure sensor that receives altitude data and transmits it to the HX710 IC, which is an ADC converter. This module is used to measure the ambient pressure and the pressure difference of liquid levels. Note: This module does not support I2C communication. You can download the datasheet of this module here.[wpdm_package id='17459'] MPS20N0040D Pressure ...

BME280 Module Features The BOSCH BME280 is a small-size, high accuracy barometric pressure module. Its small dimensions and low power consumption makes it a suitable choice for mobile phones, GPS modules and smart watches. BME280 technology is based on piezoelectric pressure and has a high accuracy, linearity and high stability and durability. In this tutorial, you will learn how to interface this module using I2C protocol. You can download the datasheet of this module here. [wpdm_package...

US-100 Distance Sensor Features The US-100 is an ultrasonic transmitter and receiver module used to measure distance. The sensor operation is very simple. You only need to measure the return time of ultrasonic waves in order to measure the distance. Then you can divide this time by 2 and multiplied by the sound speed. The sensor measuring range is about 2 to 450 cm. Note The US-100 module has 2 different communication protocol. Method 1: use serial communication Method 2: use Trigger and Echo (similar to ...