From 9282cba2593cbc1fd73bedb236ff84059d21850f Mon Sep 17 00:00:00 2001
From: Johannes Findeisen <you@hanez.org>
Date: Sat, 15 Jul 2023 23:27:56 +0200
Subject: [PATCH] Added the current version of passkey from my Arduino repo.

---
 Digispark_Passkey4.ino | 94 ++++++++++++++++++++++++++++++++++++++++++
 1 file changed, 94 insertions(+)
 create mode 100644 Digispark_Passkey4.ino

diff --git a/Digispark_Passkey4.ino b/Digispark_Passkey4.ino
new file mode 100644
index 0000000..cf15266
--- /dev/null
+++ b/Digispark_Passkey4.ino
@@ -0,0 +1,94 @@
+// Passkey for Arduino using the Digispark Rev.3 board.
+// Copyright 2022 by Johannes Findeisen <you@hanez.org>
+// Licensed under the terms of the MIT license.
+
+// Maybe I need to use HIGH instead of LOW for triggering and then I think I need a pullup resistor 
+// when using the LED pin as INPUT pin:
+// https://electronics.stackexchange.com/questions/361944/digispark-pin-mode-input-pullup-reading-low-on-pin-1
+// A pulldown resistor should maybe do the work too.
+// I like the pulldown idea because the button is easier to connect on a breadboard with one less cable... ;)
+
+// More info:
+// https://arduino.stackexchange.com/questions/75473/using-the-led-pin-for-input
+// http://thetoivonen.blogspot.com/2015/12/fixing-pin-p5-or-6-on-digispark-clones.html
+
+// NOTE: I tested it when make triggering on HIGH without using a pullup resistor and it works. Need to set 
+// the pin to LOW in setup() though. No need to read LOW from that pin anymore and no resistor required... \o/
+// I need to evaluate this pulldown-/up stuff a little more.
+#include "DigiKeyboard.h"
+
+// The button pin
+#define BUTTON_PIN 1
+// The pause after last button press before executing a command
+#define PAUSE 2000
+
+// Local variables
+unsigned long last;
+unsigned int count;
+
+// The list of available passwords
+// The number and overall lenght of passwords depends 
+// because the memory of the digispark is very limited...
+// I recommend to use a prefix you easily can remember 
+// for the password/passwords to make the passwords
+// on the passkey unusable for others in case you've lost 
+// your passkey. E.g.: WhatAWonderfulWorld -> then press the button.
+const char *passwords[] = {
+  // passwords[0]
+  "n0Emb871NAQPSIqBoldh8R7UDaNhncF7Pt60Amdo6GWdTdAPwVBi2A3KU8x8DTCRo6GWdTdXNn2wLh3SUbxVWQvFDVPtatDg",
+  // passwords[1]
+  "oaxt6e3lSgflOuJ3C6Q6sUb5gvmvI5IEPFku5fqcbxJljBOUblHIT121wCu",
+  // passwords[2]
+  "jUgKGBtiJ0iNN1Ok9vejrXNn2wLh3SUbxVWQvFDVPtat0OxJlKU8x8DTCRo6GWdTdAPwVBi2A3KUrTKQwjUgK",
+  // passwords[3]
+  "G57dFnXsPUnRq1eC1CjrGxpCjuiJFlDti54W6wBS9Ro6GWdTdAPwVBi2A3KU8x8KGBtiJ0iNN1Ok9vejrXNn2wLhH" 
+};
+
+void setup() {
+  // Set button pin to be INPUT.
+  pinMode(BUTTON_PIN, INPUT_PULLUP);
+  // Set BUTTON_PIN pin to LOW because the button is connected 
+  // to VCC when pressed and will go HIGH.
+  digitalWrite(BUTTON_PIN, LOW);
+  // Initialize HID
+  DigiKeyboard.delay(0);
+  DigiKeyboard.sendKeyStroke(0);
+}
+
+void loop() {
+  // Read button state
+  if (digitalRead(BUTTON_PIN) == HIGH) {
+    // Button is pressed; increment count.
+    count++;
+    // Wait until button is released
+    while (digitalRead(BUTTON_PIN) == HIGH) {
+      delay(1);
+    }
+    // Set the last press timestamp
+    last = millis();
+  }
+  // Wait PAUSE time before executing a command
+  if (count > 0 && (millis() - last) >= PAUSE) {
+    // The switch case is the number of button presses
+    switch (count) {
+      case 1:
+        DigiKeyboard.println(passwords[0]);
+        break;
+      case 2:
+        DigiKeyboard.println(passwords[1]);
+        break;
+      case 3:
+        DigiKeyboard.println(passwords[2]);
+        break;
+      case 5:
+        // You can use print instead of println if you don't want 
+        // to hit enter automatically after inserting the password
+        DigiKeyboard.print(passwords[3]);
+        break;
+      default:
+        break;
+    }
+    // Reset the counter
+    count = 0;
+  }
+}