120MHz main frequency, 1M Bits Flash Memory, 128KB SRAM
Fingerprint registration capacity
1000 by default,
False Acceptance Rate (FAR)
<0.001% (Security Level is 3)
Rejection rate (FRR)
<0.1% (Security Level is 3)
1: N and 1: 1 comparison
Fingerprint template size
570 bytes Byte
Security level setting
出厂设置值：Level 3 Level 1 to Level 5 can be set, factory setting value: Level 3
Fingerprint feature extraction time <0.45 seconds
1: N comparison time (when 3000 full registrations) <1.5 seconds
UART, 3.3V-TTL level
Serial communication parameters
No parity = Parity = NONE, Stop Bit = 1
Flow Control = NONE
The baud rate is 9600, 19200, 38400, 57600, 115200 (bps)
Factory setting: 115200bps
Win voltage: DC3.3V ± 10%
Less than 100mA
Working temperature: -10 ℃-60 ℃
Relative humidity: 20% – 80%
The design of A21 is a secondary development module for fingerprint identification combined with fingerprint collection and fingerprint comparison. It has small size, low power consumption, universal interface, high reliability, super simple use, and scalable large capacity 1: N identification ( 3000 fingerprints, non-group identification response time is less than 1.5 seconds) and other advantages, it can be easily embedded in the user system to form a fingerprint identification product that meets customer needs.
A21 adopts imported fingerprint recognition algorithm.
自学习功能：指纹识别过程中，最新提取的指纹特征值识别成功后将该特征值融合到指纹数据库中，使用户在使用过程中越用越好用。 ◆ Self-learning function: During the fingerprint recognition process, the newly extracted fingerprint feature value is successfully identified and the feature value is integrated into the fingerprint database, so that the more useful the user is during the use process.
360度自动校正识别功能：在模块上任意角度按压 正确注册的手指，比对都可以通过。 ◆ 360-degree automatic correction recognition function: Press the finger registered at any angle on the module, and the comparison can pass.
指纹认假率低：最大可做到0.0001%，即在100万不同的指纹里，随机挑取一枚指纹，用100万里的其他枚指纹依次和选取的指纹比对，会出现一次识别通过。 ◆ Low fingerprint recognition rate: The maximum can be 0.0001%, that is, one fingerprint is randomly selected among 1 million different fingerprints, and the other fingerprints in 1 million miles are compared with the selected fingerprints in turn, and a recognition pass will occur. .
指纹拒真率低：最大可做到0.0001%，在已经存在的100万枚指纹里，分别用100万枚指纹里的指纹按任意顺序比对100万次，会出现一次识别不通过。 ◆ Low fingerprint rejection rate: The maximum can be 0.0001%. Among the existing 1 million fingerprints, the fingerprints in the 1 million fingerprints are used to compare one million times in any order, and a recognition failure will occur.
Shenzhen Aidi Digital Communication Electronics Co., Ltd. Telephone: 0755-86039586 / 29605335 Fax: 0755-86039586 to 801 Mobile phone: 18938845176 QQ: 214959475
Address: Building 516, Liantangkeng Industrial Park, Fenghuanggang, No. 10 Baotian Second Road, Xixiang, Baoan, Shenzhen