Add serial and Arduino file

2022-06-24 15:55:13 -07:00
parent 27fc1f5e16
commit 0e638e51bf
12 changed files with 133 additions and 73 deletions
--- a/arduino/LiquidCrystal_I2C.ino
+++ b/arduino/LiquidCrystal_I2C.ino
@ -0,0 +1,64 @@
+/**
+* Displays text sent over the serial port (e.g. from the Serial Monitor) on
+* an attached LCD.
+* https://wiki.52pi.com/index.php?title=Z-0234
+*/
+
+#include <Wire.h> 
+#include <LiquidCrystal_I2C.h>
+
+String topLine;
+String bottomLine;
+String incomingString;
+
+// Set the LCD address to 0x27 for a 16 chars and 2 line display
+LiquidCrystal_I2C lcd(0x27, 16, 2);
+
+void setup()
+{
+    lcd.begin();
+    lcd.backlight();
+
+    // Initialize the serial port at a speed of 9600 baud
+    Serial.begin(9600);
+}
+
+void loop()
+{
+    // If characters arrived over the serial port...
+    if (Serial.available())
+    {
+        // Wait a bit for the entire message to arrive
+        delay(100);
+        // Clear the screen
+        lcd.clear();
+        lcd.setCursor(0, 0);
+        // Write all characters received with the serial port to the LCD.
+        while (Serial.available() > 0)
+        {
+            incomingString = Serial.readString();
+            Serial.println(incomingString);
+            if (incomingString[0] != '1')
+            {
+                topLine = incomingString;
+            }
+            else
+            {
+                if (incomingString != "123456" && (incomingString.length() < 2 || (incomingString[1] != 't' && incomingString[1] != 'T')))
+                {
+                    bottomLine = "";
+                }
+                else
+                {
+                    bottomLine = incomingString;
+                    bottomLine[0] = ' ';
+                    bottomLine[1] = ' ';
+                }
+            }
+
+            lcd.print(topLine);
+            lcd.setCursor(0, 1);
+            lcd.print(bottomLine);
+        }
+    }
+}