Add UART Comms Example

Example - UART Comms/README.md

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+# UART Communication Example Script #
+
+These scripts contains peer-to-peer communication using UART protocol. See usage below:
+* **UART_Receive.py** is a Raspberry Pi 3B+ script as Receiver. Please adjust the port **/dev/ttyAMA0** accordingly.
+* **UART_SEND.py** is an ESP8266 script as Sender. Please adjust accordingly

Example - UART Comms/UART_Receive.py

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+import serial
+import time
+import ast
+
+ser = serial.Serial(
+  port='/dev/ttyAMA0',
+  baudrate = 115200,
+  parity=serial.PARITY_NONE,
+  stopbits=serial.STOPBITS_ONE,
+  bytesize=serial.EIGHTBITS,
+  timeout=1
+)
+
+print("Receiving")
+
+while True:
+    data = (ser.readline())
+    enc_data = data.decode("utf-8")
+    if len(enc_data) != 0:
+        data = "{"+enc_data+"}"
+        data = ast.literal_eval(data)
+        print(data)

Example - UART Comms/UART_Send.py

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+from machine import UART
+from machine import Pin
+import utime as time
+from dht import DHT11
+
+# LED
+led = Pin(25, Pin.OUT)
+
+# Relay
+# relay = Pin(27, Pin.OUT)
+
+# UART
+uart = UART(0,baudrate = 115200)
+
+# Sensor
+pin = Pin(28, Pin.IN)
+sensor = DHT11(pin)
+
+led.off()
+
+print("=> Starting Temp and Humid Monitor")
+
+while True:
+    time.sleep(1)
+    led.on()
+    t = (sensor.temperature())
+    h = (sensor.humidity())
+    sensor.measure()
+    print("==> Temperature: {}".format(t))
+    print("==> Humidity: {}".format(h))
+    print()
+    message = "'temp':{},'hum':{}".format(t,h)
+    uart.write(message.encode('utf-8'))
+    time.sleep(1)
+    led.off()