Focused crawls are collections of frequently-updated webcrawl data from narrow (as opposed to broad or wide) web crawls, often focused on a single domain or subdomain.
It uses GPRS and GPS technologies which allows to easily perform realtime tracking. Here idea is simple: read the GPS coordinates (longitude and latitude) and send them by using HTTP request to a web server. Then use a web browser to load the PHP webpage which uses GOOGLE MAPS to show the location in realtime.
It is used to make only the people who has a password pass the door and does not for those who do not have a password ,the password is written by the keypad and is displayed on the lcd the ARM MC take this password and transmit it to the AVR MC through the SPI protocol , the AVR authenticates that the password is already saved in the EEPROM which communicate with the AVR through the I2C protocol ,then the AVR returns the result to the ARM with the time and the date using RTC which communicates with the AVR by I2C protocol ,then the ARM opens/closes the door ,and view that to the admin through the UART protocol on the PUTTY terminal . The admin can add , delete or edit this passwords ,and also can open the door manually if he needs that
I used 8-bit timer in normal mode, with OVF interrupt we can count seconds, minutes, and hours. To reset time I used two external interrupts and select button. To keep last value of clock after power cut off, I used EEPROM driver to store time every second in EEPROM. Finally I used LCD 2x16 to display my clock.
Navigating a bot using LIDAR (light detection and ranging) sensor and magnetometer HMC5883. Runs on wemos d1 mini / atmega 16 - 32 independently / combined. My R&D topic for 2018. @laukik-hase@ved29