Mar 06, 2008 · The ping command is a useful test available on Cisco internetworking devices as well as on many host systems. In TCP/IP, this diagnostic tool is also called an Internet Control Message Protocol (ICMP) Echo Request. Note: The ping command is particularly useful when the show interfaces serial output registers high levels of input errors. apple articles, stories, news and information.
Apr 14, 2017 · The screenshot of the printed command on LCD is shown in the figure below. Now, if you send the command A through the serial port the stepper motor will start to rotate in anti clockwise direction and the command will also be printed on the LCD. The screenshot of the printed command on LCD is shown in the figure below. The easiest way to restore the serial port (and SPI and I2C) is to reboot your Pi. Sample run gordon @ pi2: ./pintest PinTest ===== This is a simple utility to test the GPIO pins on your revision 1 Raspberry Pi. NOTE: All GPIO peripherals must be removed to perform this test. This includes serial, I2C and SPI connections.