Capacitive fingerprint recognition module use tutorial ten minutes to teach you to use fingerprint recognition
FPC1020A
1020A is a fingerprint recognition module designed for single-chip microcomputers. It has the characteristics of small size, low power consumption, and simple serial communication interface. The fingerprint template of the module is only 193 bytes, and the large-capacity fingerprint recognition has short response time. It is very convenient for users to connect to devices such as single-chip microcomputers, and the serial port output data is easy to process. Users who adopt single-chip fingerprint identification design can consider adopting this product!
The front and back pictures of the fingerprint module introduced in this issue! ! !
Take a 
picture on the front and you can see that the black block in the middle of the white frame is where the module detects the fingerprint. Take
a picture on the back and look at it
. On the back, we can see that there is a main control chip and an SH1.25 interface that leads to the user.
Pin description
| Pin number | name | Types of | Function description |
|---|---|---|---|
| 1 | VT | In | Finger detection power supply positive input |
| 2 | T | Out | Finger detection signal output terminal |
| 3 | V | In | Power supply positive input terminal, 3.3V |
| 4 | TX | Out | Serial data output, TTL logic level |
| 5 | RX | In | Serial data input, TTL logic level |
| 6 | GND | - | Signal ground, internally connected to power ground |
Preparation before use
This tutorial is connected to the computer through the USB-TTL level conversion module and use the PC terminal to operate the module
Figure 1 USB-TTL module
|
Figure 2 Capacitive fingerprint module
|
Figure 3 Connection line
|
Wiring instructions
| Fingerprint module | USB-TTL |
|---|---|
| V | 3V3 |
| TX | RX |
| RX | TX |
| GND | GND |
Use reference
After connecting to the computer, check the connected port number in the device manager.
After checking the port number, set the communication serial port in the PC software. Select COM4 (here I am COM4).
Click the test on the right side of the setting, and then click User Entry. The ID number is from Increase by 1, set the parameter selection to 1, and finally click the send command,
put your finger on it, and wait for 3~5S to
enter successfully.
We take the total number of users and find that the total number of users returned is 1. After
clicking the capture image send command, you can also capture fingerprint images. The time is abbreviated long
to sum up
Then we can follow the above steps to operate the software on the computer and play happily!