DF Robot LCD keypad Arduino shield reference

Reference for a very cheap (3.99 € with free shipping) LCD keypad shield for Arduino bought from banggood (SKU: SKU083549). Here goes the source code (adapted from this source, slightly improved with custom functions to switch light when pushing the Select button): //Sample using LiquidCrystal library #include <LiquidCrystal.h> /******************************************************* This program will test the LCD panel and the buttons Mark Bramwell, July 2010 ********************************************************/ // select the pins used on the LCD panel LiquidCrystal lcd(8, 9, 4, 5, 6, 7); // define some values used by the panel and buttons int lcd_key = 0; int adc_key_in = 0; #define btnRIGHT 0 #define btnUP 1 #define btnDOWN 2 #define btnLEFT 3 #define btnSELECT 4 #define btnNONE 5 // read the buttons int read_LCD_buttons() { adc_key_in = analogRead(0); // read the value from the sensor // my buttons when read are centered at these values: 0, 144, 329, 504, 741 // we add approx 50 to those values and check to see if we are close if (adc_key_in > 1000) return btnNONE; // We make this the 1st option for speed reasons since it will be the most likely result // For V1.

GNU screen memo

The screen utility is a free terminal multiplexer for Linux (source): Screen is a full-screen window manager that multiplexes a physical terminal between several processes, typically interactive shells. Each virtual terminal provides the functions of the DEC VT100 terminal and, in addition, several control functions from the ANSI X3.64 (ISO 6429) and ISO 2022 standards (e.g., insert/delete line and support for multiple character sets). There is a scrollback history buffer for each virtual terminal and a copy-and-paste mechanism that allows the user to move text regions between windows.