Biometric sensor has Hugh application in security, attendance etc. We use R307 Fingerprint Module. R307 Fingerprint Module consists of optical fingerprint sensor, high-speed DSP processor. Fingerprint processing includes two parts: fingerprint enrollment and fingerprint matching (the matching can be 1:1 or 1:N). When enrolling, user needs to enter the finger two times. The system will […]
Category: UART
In GSM networking topology SIM (Subscriber Identity Module) is the key. In this article we use sms (short message service) to control load. For SIM reading we use module SIM900A GSM module. First look the connection diagram- For transmission data the basic format is- Here, <CR> Carriage Return (‘\r’ or 0x0D) – moves the cursor
GPS stands for Global Positioning System and used to detect the Latitude and Longitude of any location on the earth, with exact UTC (Universe Time Coordinated) time. It is one of the global navigation satellite system (GSS) that provide geo-location and time information to a GPS receiver anywhere on or near the earth where is
To communication with PC or laptop with microcontroller, the popular protocol is UART. In PC or laptop we see serial port which has Tx and Rx pin. It is a 9 pin terminal which has the pin- For Asynchronous data transmission we need only 3 wire – Rx, Tx and Ground. The RTS and CTS
USART stands for Universal Synchronous Asynchronous Transmitter and Receiver in which a packet of data enclosed in an envelope of start and stop bit. Synchronous means that single clock source would be shared by end devices to facilitate communication and asynchronous means, there would be no synchronous clock source would be the end of the
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