//UART serial communication between 2 Arduino Unos!
//Source: https://www.programmingboss.com
//Modified by Barbu Vulc!
//UART Constants
#define RXp2 16
#define TXp2 17

void setup() {
  Serial.begin(9600);
  Serial.begin(9600, SERIAL_8N1, RXp2, TXp2);
}

void loop() {
  Serial.println("Message received: ");
  Serial.println(Serial.readString());
}


Arduino1.ino

diagram.json

//UART serial communication between an Arduino Uno & a ESP32!
//Source: https://www.programmingboss.com
//FreeRTOS library for Arduino:
#include <Arduino_FreeRTOS.h>

//Define variables for photoresistor:
const int sensorMin = 0;   //Sensor minimum...
const int sensorMax = 500; //Sensor maximum...
//Variables for LED:
const int LED = 12;

void setup() {
  //Serial communication:
  Serial.begin(9600);
  //LEDs' initialization:
  pinMode(LED, OUTPUT);
  //The created task!
  xTaskCreate(Task, "Photoresistor", 100, NULL, 0, NULL);
}

//Task for photoresistor!
static void Task(void* pvParameters) {
  while (1) {
    // read the sensor:
    int sensorReading = analogRead(A0);
    // map the sensor range to a range of four options:
    int range = map(sensorReading, sensorMin, sensorMax, 0, 3);
    Serial.println("Range: ");
    Serial.print(range);
    Serial.println(" lux \n");
    digitalWrite(LED1, 0);  digitalWrite(LED2, 1);
    vTaskDelay(1000 / portTICK_PERIOD_MS);
    if(LED < 100){
      digitalWrite(LED, HIGH);
    }else{
      digitalWrite(LED, LOW);
    }
  }
}

//We don't need loop here!
void loop() {}


Arduino2.ino

# Wokwi Library List
# See https://docs.wokwi.com/guides/libraries

# Automatically added based on includes:
FreeRTOS