Fingerprint Reader Sensor Module 8x8 rgb matrix Key switch module KY-004

Key switch module KY-004

self-calibrated Bluetooth Bluetooth coexistence interface to ensure optimal performance in all operating conditions

and with two USB outputs will be a normal job

It uses ATmega328

so when using our library

Fingerprint Reader Sensor Module 8x8 rgb matrix Key switch module KY-004Module via a serial communication interface, directly with 3. 3V or 5V power microcontroller communication: Module data transmission feet (2 Foot TD) connected to the data bit machine receiving end (RXD), data receiver module feet (3 feet RD) connected to the data sender bit machine (TXD). For the RS 232 level (for example: PC machine) for PC communication, increase the level conversion between the module and the host computer Circuitry (e. g.: MAX232