For example like this
from machine import Pin,UART
import time
uart=UART(0,9600)
r=Pin(10,Pin.OUT)
but=Pin(15,Pin.IN)
while True:
if uart.any():
data=uart.read()
data=str(data)
print(data)
if('R_ON' in data):
r.value(1)
elif('R_OFF' in data):
r.value(0)
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What is your problem actually ?
This with Raspberry Pi 3 Model B:
https://community-appinventor-mit-edu.ezproxy.canberra.edu.au/search?q=raspberry
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just dont know how to use phone to read the data from the raspberry pi
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