add Project file

pi_1/app/app.c

pi_1/led_dev/Makefile

pi_1/led_dev/led_dev.c

pi_1/spi_dev/Makefile

pi_1/spi_dev/spi_dev.c

pi_2/app.c

pi_2/i2c/Makefile

pi_2/i2c/i2c_ioctl.c

pi_2/i2c_pir.sh

pi_2/lcd.h

pi_2/pir/Makefile

pi_2/pir/app.c

pi_2/pir/pir_ioctl.c

pi_2/server.c

pi_2/socket.h

pi_3/app/app.c

pi_3/app/socket.c

pi_3/led/Makefile

pi_3/led/led_dev.c

pi_3/led/w_script.sh