Iam triying to make online attendance using Arduino.I need to use a number like 150 from the input using the keypad. <if (input == '11' ) { Serial.print("!!--"); Serial.println(key); NAME = "Dog"; ID = "11"; makeIFTTTRequest(); Serial.print("Attendace Marked for "); Serial.println(NAME); in…

#include <WiFi.h> #include <Keypad.h> const byte ROWS = 4; //four rows const byte COLS = 4; //three columns char keys[ROWS][COLS] = { {'1', '2', '3', 'A'}, {'4', '5', '6', 'B'}, {'7', '8', '9', 'C'}, {'*', '0', '#', 'D'} }; byte rowPins[ROWS] = {13, 12, 14, 27}; //connect to the row pinouts…

if (key >= '0' && key <= '9') { Serial.print(key); input *= 10; input += key - '0'; } if (key == '#') // 'enter' { switch (input) { case 11: Serial.print("!!--"); NAME = "Dog"; ID = "11"; makeIFTTTRequest(); Serial.print("!!--Attendace Marked for "…

I came with an error Compilation error: no match for 'operator*=' (operand types are 'String' and 'int')

This is my whole code can you pls edit the errors #include <WiFi.h> #include <Keypad.h> const byte ROWS = 4; //four rows const byte COLS = 4; //three columns char keys[ROWS][COLS] = { {'1','2','3','A'}, {'4','5','6','B'}, {'7','8','9','C'}, {'*','0','#','D'} }; byte rowPins[ROWS] = {13,12,…

thanks it worked.But how to add backspace using the * key

MY experience was that it is easier to add a "cancel" key and just start over.

Did you mean if I pressed the * key, set input to 0?

Any way to enter the data quickly?Because I need to enter 100++ data. case 11: SendData(); NAME = "Parrot"; ID = "11"; break; case 12: SendData(); NAME = "bla"; ID = "12"; break;

Need to store the keypad inputs as one input

Projects General Guidance

UKHeliBob December 9, 2022, 2:26pm 2

See Keypad data entry. A beginners guide

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Need to store the keypad inputs as one input

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