docs: 同步日常维护指南并补齐遗漏的板卡配置

mixly/boards/default/micropython/build/lib/uart_com.py

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+"""
+UART Communication
+
+MicroPython library for the UART_COM（Board to board communication）
+=======================================================
+#Preliminary composition           				20220903
+
+dahanzimin From the Mixly Team 
+"""
+_sdata=None
+
+def send(uart,data,repeat=True):
+	global _sdata	
+	if data != _sdata:
+		uart.write((str(data)+'\n'))
+		if not repeat:
+			_sdata=data
+            
+def recv(uart):
+	data = uart.readline()
+	if data:
+		data_str = data.strip()
+		try:
+			data_str=data_str.decode()
+			return eval(data_str)
+		except:
+			return data_str