Esp32 hardwareserial8/4/2023 ![]() ![]() Operating Voltage DC 4.2V-6V Working current Typical: 50mA Baud rate (9600*N)bps, N=1~12 (default N=6) Image acquiring time <0.5s Storage capacity 1000 Interface UART(TTLlogical We will be using the serial or UART option in this post for us to communicate with our ESP32 microcontroller running the Arduino framework.īelow are the most important technical parameter of this sensor and the complete datasheet can be found here. It has built-in support for Serial or UART (Universal Asynchronous Receiver Transmitter) protocol to be used when communicating with Microcontrollers and it has a USB 2.0 output that can you can connect to your laptop or workstation. It is a small subsystem that contains its own DSP processor, image processing, and image comparison modules in a compact package that is very much ideal for Internet of Things (IoT) project that requires biometric security. This sensor is the upgraded version of the old R305 sensor from the Hangzhou Grow Technology company which comes from China. The ultrasonic sensor captures your fingerprints by using high-frequency waves to capture your fingerprint layout. ![]() Capacitive scanners on the other hand measure the distance between the ridges of your fingerprint to create the overall layout of your fingerprints. Optical scanner works by shining a bright light and capturing a digital image of your fingerprints. The images are then stored (enrolled) and compared thru sophisticated algorithms by measuring the distance between the ridges and valleys.įingerprint scanners may come as optical, capacitive, or ultrasonic in nature and they each have their own advantages. The process by which fingerprint scanning works is by capturing these ridges and valleys and transforming them into a digital image. Our fingerprint contains ridges and valleys when closely look upon and it helps us in handling things as it improves the friction between our hands and the object. How does fingerprint scanning work?Įvery finger on our hands contains unique patterns of fingerprints that are essentially different from another person’s fingerprints. If you want to see a video demo presentation of this project then please see below or watch it on my YouTube channel. If you want to add another layer of security to your projects then checking the identity of every person who wants to access your premises thru fingerprints is an excellent option. Can I download the R307 fingerprint sensor image and saved it to the file or database?ĭo you need to include biometric security such as fingerprints in your Internet of Things (IoT) projects? I highly suggest using your ESP32 microcontrollers that run with the Arduino framework to make use of this R307 fingerprint sensor.How R307 communicates with ESP32 Microcontroller?. ![]()
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