Added UART code

Author: evaherrada

UART-Between-Boards/code.py

@@ -0,0 +1,56 @@
+# SPDX-FileCopyrightText: Copyright (c) 2021 Dylan Herrada for Adafruit Industries
+#
+# SPDX-License-Identifier: Unlicense
+"""
+Code for communicating between two CircuitPython boards using UART.
+Increments built-in neopixel values of the other board starting from blue, then green and red.
+"""
+import time
+import board
+import busio
+import neopixel
+
+pixel = neopixel.NeoPixel(board.NEOPIXEL, 1, brightness=1.0, auto_write=True)
+
+uart = busio.UART(board.TX, board.RX, baudrate=9600)
+
+
+array = [0x55, 0, 0, 0, 0xAA]
+print(array)
+barray = bytearray(array)
+print(barray)
+
+uart.write(barray)
+while True:
+    data = uart.read(32)  # read up to 32 bytes
+    if data is not None:
+        msg = []
+        print(data)
+        if data[0] == 85 and data[-1] == 170:
+            for byte in data[1:-1]:
+                if len(msg) == 3:
+                    break
+                print(byte)
+                msg.append(byte)
+
+        print(msg)
+        print(type(msg))
+
+        pixel.fill(msg)
+
+        time.sleep(0.1)
+
+        if msg[2] < 255:
+            data = [msg[0], msg[1], msg[2] + 5]
+            data.insert(0, 0x55)
+            data.append(0xAA)
+        elif msg[1] < 255:
+            data = [msg[0], msg[1] + 5, msg[2]]
+            data.insert(0, 0x55)
+            data.append(0xAA)
+        elif msg[0] < 255:
+            data = [msg[0] + 5, msg[1], msg[2]]
+            data.insert(0, 0x55)
+            data.append(0xAA)
+        print(data)
+        uart.write(bytearray(data))