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# This work is licensed under the MIT license.
# Copyright (c) 2013-2023 OpenMV LLC. All rights reserved.
# https://github.com/openmv/openmv/blob/master/LICENSE
#
# Basic UART communications between OpenMV and Arduino Uno.
# 1) Wire up your OpenMV Cam to your Arduino Uno like this:
#
# OpenMV Cam Ground Pin ----> Arduino Ground
# OpenMV Cam UART3_TX(P4) ----> Arduino Uno UART_RX(0)
# OpenMV Cam UART3_RX(P5) ----> Arduino Uno UART_TX(1)
# 2) Uncomment and upload the following sketch to Arduino:
#
# void setup() {
# // put your setup code here, to run once:
# Serial.begin(19200);
# }
#
# void loop() {
# // put your main code here, to run repeatedly:
# if (Serial.available()) {
# // Read the most recent byte
# byte byteRead = Serial.read();
# // ECHO the value that was read
# Serial.write(byteRead);
# }
# }
# 3) Run the following script in OpenMV IDE:
import time
from pyb import UART
# UART 3, and baudrate.
uart = UART(3, 19200, timeout_char=200)
while True:
uart.write("Hello World!\n")
if uart.any():
print(uart.read())
time.sleep_ms(1000)
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