from machine import UART, Pin
import time

time.sleep(0.5)
print("Starting UART loopback test")

uart = UART(1, baudrate=9600, tx=Pin(8), rx=Pin(9))

# Clear any old bytes
while uart.any():
    uart.read()

message = "Hello Wokwi"

# Send the string
uart.write(message)

# Give the bytes time to loop back
time.sleep(0.2)

# Read back whatever arrived
received = b""
while uart.any():
    chunk = uart.read()
    if chunk:
        received += chunk

if received:
    print("Received:", received.decode())
else:
    print("No data received")