I dont know how to start my code for a project with many sensors

Other Hardware Sensors
1

I've started a new project that requires input from a sonar aka a hand in front to open the lid using a servo. Once the hand is taken away, the servo will reset (closing the lid) which presses a limit switch and turns on a UV light which will turn on for either 10 minutes or until the lid is reopened.

here's what i have so far, mainly mocked up so its not correct
I've coded in python and an engineering language, but never c++

#include <iostream>
using namespace std;
void Sonar_Setup()  // run at setup once
    {
         #define TRIGGER_PIN  20  // Arduino trigger pin on sonar
         #define ECHO_PIN     21  // Arduino echo pin on sonar
         #define MAX_DISTANCE 200
    }
if 
    //if sonar value = true (values that would be close to the sonar))
    //the servo will set to the specific point needed
    else 
    //the servo will not move or will reset to the srtart point 
if 
    //if limit switch= yes 
    //uv light will turn on for 10 minutes or until values changes 
    else 
    //uv light will turn off 
int main()
 if ()
2

I'm using an Arduino Uno, micro limit switch, arduino servo, and Arduino Sonar and a UVC light

3

In the Arduino world we usually use the functions setup() and loop(); you don't have to but it will make life a lot easier.

Start by having a look at example code for your sonar. Once you have figured that out, you can have a look how to control a servo; again, there are examples.

Next combine those two.

Next there are also some examples in the IDE that demonstrate how to read a pin (your limit switch) and write a pin (your UV light). Study them, combine them and so on.

Lastly merge everything together.

Note:
Your use of the #defines is incorrect.

1 Like
4

https://docs.arduino.cc/built-in-examples/basics/BareMinimum

https://docs.arduino.cc/built-in-examples/digital/InputPullupSerial/

https://docs.arduino.cc/learn/electronics/servo-motors/

5

thanks so much for the help!

6

As you practice each stage, post any questions here. Step by step you will have your project working.

7

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