From 1d5ce610d31f2e918a47cdee73907c73bef7b57e Mon Sep 17 00:00:00 2001
From: unlockable <g@unlockableworld.com>
Date: Fri, 7 Jul 2023 02:24:37 +0800
Subject: [PATCH] Real Homework4.

---
 Homework/Homework4/Bluetooth/Bluetooth.ino | 20 +++---
 Homework/Homework4/Homework4.ino           | 38 ------------
 Homework/Homework4/Homework4/Homework4.ino | 71 ++++++++++++++++++++++
 3 files changed, 81 insertions(+), 48 deletions(-)
 delete mode 100644 Homework/Homework4/Homework4.ino
 create mode 100644 Homework/Homework4/Homework4/Homework4.ino

diff --git a/Homework/Homework4/Bluetooth/Bluetooth.ino b/Homework/Homework4/Bluetooth/Bluetooth.ino
index 7673be4..77c9ecc 100644
--- a/Homework/Homework4/Bluetooth/Bluetooth.ino
+++ b/Homework/Homework4/Bluetooth/Bluetooth.ino
@@ -13,17 +13,17 @@ void setup() {
 }
 
 void loop() {
-    if (Serial.available()) {
-        char ch = Serial.read();
-        Serial.print(ch);
-        soft_serial.print(ch);
+    while (Serial.available()) {
+        String input = Serial.readString();
+        Serial.print(input);
+        soft_serial.print(input);
     }
-    if (soft_serial.available()) {
-        char ch = soft_serial.read();
-        Serial.print(ch);
-        soft_serial.print(ch);
+    while (soft_serial.available()) {
+        String input = soft_serial.readString();
+        Serial.print(input);
+        soft_serial.print(input);
     }
-    Serial.println("A loop");
+    // Serial.println("A loop");
     // Serial.println("A loop");
     // if (soft_serial.availableForWrite()) {
     //     Serial.println("Available");
@@ -34,5 +34,5 @@ void loop() {
     // if (Serial.availableForWrite()) {
     //     Serial.println("Can Write");
     // }
-    delay(1000);
+    // delay(1000);
 }
\ No newline at end of file
diff --git a/Homework/Homework4/Homework4.ino b/Homework/Homework4/Homework4.ino
deleted file mode 100644
index 43d874a..0000000
--- a/Homework/Homework4/Homework4.ino
+++ /dev/null
@@ -1,38 +0,0 @@
-#include "SoftwareSerial.h"
-#include "U8glib.h"
-
-const byte bt_tx_connected_to = 11;
-const byte bt_rx_connected_to = 12;
-
-String pass = "0721";
-String recovery_pass
-
-SoftwareSerial bt_serial(bt_tx_connected_to, bt_rx_connected_to);
-U8GLIB_SSD1306_128X32 u8g(U8G_I2C_OPT_NONE);
-
-void setup() {
-  Serial.begin(9600);
-  bt_serial.begin(9600);
-  u8g.setFont(u8g_font_courR08);
-}
-
-void loop() {
-  draw_locked();
-  delay(1000);
-  draw_unlocked();
-  delay(1000);
-}
-
-void draw_unlocked() {
-  u8g.firstPage();
-  do {
-    u8g.drawStr(0, 16, "Unlocked");
-  } while (u8g.nextPage());
-}
-
-void draw_locked() {
-  u8g.firstPage();
-  do {
-    u8g.drawStr(0, 8, "Locked");
-  } while (u8g.nextPage());
-}
\ No newline at end of file
diff --git a/Homework/Homework4/Homework4/Homework4.ino b/Homework/Homework4/Homework4/Homework4.ino
new file mode 100644
index 0000000..d781b87
--- /dev/null
+++ b/Homework/Homework4/Homework4/Homework4.ino
@@ -0,0 +1,71 @@
+#include "SoftwareSerial.h"
+#include "U8glib.h"
+#define UNLOCKED 0
+#define LOCKED 1
+
+const byte rx_connected = 11;
+const byte tx_connected = 10;
+
+const String password = "0721";
+const String reset_pass = "1145";
+
+byte status = LOCKED;
+
+String input = "";
+
+U8GLIB_SSD1306_128X32 u8g(U8G_I2C_OPT_NONE); // I2C / TWI
+
+SoftwareSerial soft_serial(tx_connected, rx_connected);
+
+void setup() {
+  pinMode(tx_connected, INPUT);
+  pinMode(rx_connected, OUTPUT);
+  Serial.begin(9600);
+  soft_serial.begin(9600);
+  u8g.setFont(u8g_font_courR08);
+  draw_locked();
+}
+
+void loop() {
+  while (soft_serial.available() && input.length() <= 4) {
+    input += soft_serial.readString();
+  }
+
+  if (input.length() < 4) {
+    return;
+  }
+  switch (status) {
+  case LOCKED:
+    if (input.substring(0, 4) == password) {
+      Serial.println("PASS");
+      status = UNLOCKED;
+      draw_unlocked();
+    }
+    else {
+      Serial.println("FAIL");
+    }
+    input = "";
+    break;
+  case UNLOCKED:
+    if (input.substring(0, 4) == reset_pass) {
+      status = LOCKED;
+      draw_locked();
+    }
+    input = "";
+    break;
+  }
+}
+
+void draw_unlocked() {
+  u8g.firstPage();
+  do {
+    u8g.drawStr(0, 16, "Unlocked");
+  } while (u8g.nextPage());
+}
+
+void draw_locked() {
+  u8g.firstPage();
+  do {
+    u8g.drawStr(0, 8, "Locked");
+  } while (u8g.nextPage());
+}
\ No newline at end of file