init

CARDPUTER CircuitPython/keyboard.py

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+import sys
+
+class Keyboard:
+    def __init__(self):
+        # the number row starts with 3 and ends with the number, e.g. key number 5 is 0x35
+        self.number_row=["0x30","0x31","0x32","0x33","0x34","0x35","0x36","0x37","0x38","0x39"]
+        self.shift_number_row={"0x21":"!","0x40":"@","0x23":"#","0x24":"$","0x25":"%","0x5e":"^","0x26":"&","0x2a":"*","0x28":"(","0x29":")"}
+        self.lowercase={
+            "0x71":"q", "0x77":"w", "0x65":"e", "0x72":"r", "0x74":"t", "0x79":"y", "0x75":"u", "0x69":"i", "0x6f":"o", "0x70":"p",
+            "0x61":"a", "0x73":"s", "0x64":"d", "0x66":"f", "0x67":"g", "0x68":"h", "0x6a":"j", "0x6b":"k", "0x6c":"l",
+            "0x7a":"z", "0x78":"x", "0x63":"c", "0x76":"v", "0x62":"b", "0x6e":"n", "0x6d":"m"
+        }
+        self.uppercase={
+            "0x51":"Q", "0x57":"W", "0x45":"E", "0x52":"R", "0x54":"T", "0x59":"Y", "0x55":"U", "0x49":"I", "0x4f":"O", "0x50":"P",
+            "0x41":"A", "0x53":"S", "0x44":"D", "0x46":"F", "0x47":"G", "0x48":"H", "0x4a":"J", "0x4b":"K", "0x4c":"L",
+            "0x5a":"Z", "0x58":"X", "0x43":"C", "0x56":"V", "0x42":"B", "0x4e":"N", "0x4d":"M"
+        }
+
+    def scan(self):
+        code=hex(ord(sys.stdin.read(1)))
+        #printing the code can be useful for debugging purposes, to check that the codes have been logged correctly if something unexpected is happening
+        #print(code)
+        key = None
+        if code in self.number_row:
+            key = str(self.number_row.index(code))
+        elif code in self.shift_number_row:
+            key = self.shift_number_row[code]
+        elif code in self.lowercase:
+            key = self.lowercase[code]
+        elif code in self.uppercase:
+            key = self.uppercase[code]
+            
+        if key:
+            return key
+        else:
+            return "UNKNOWN "+code

CARDPUTER CircuitPython/test.py

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+from keyboard import Keyboard
+
+keyb=Keyboard()
+while True:
+    print(keyb.scan(), end="")

README.md

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+# What?
+Good question I will answer it some other time