Hello!
I have to do this arduino project for my last subject, individual project 
and I have never done any sort of programming but the school is expecting us to finish the project ( Arduino/raspberry pi with cloud ).
Anyways, since the professor cannot help us as he never done it before too.. so I tried to draw a circuit with the help from the website and wondering whether this would work or not .
I am using Arduino Uno, with waterproof temp sensor, ultrasonic sensor and ph sensor
Thank you!
many of us did ask the school but they want us to self-learning to do it
they are telling us many students have done that already so yeah.. have to deal with it...
and they said, we can use the code from the web ( no need for us to write a whole new code but still it is pretty tough
At first blush, you probably can. You'll need to start by gathering the spec sheets on all of the components and what they require in terms of voltage, Amperage, and communications. You don't need to understand it yet, but you will need it eventually. Once you have that, download the Arduino IDE (programming software) and take a look through the examples provided. See if you can tackle any of the sensors and do them one at a time.
Check back in then.
I tried to connect the ultrasonic first and
the Arduino idle is giving me the error 'redefinition of void set up'
when there is no duplicated or any other void set up in the code..
For the hardware side, yes, it's possible to connect multiple sensors to the same Arduino.
What you now need is to start programming. My advise is to do it step by step:
If you need help on any of the above steps, post here the complete code you're using, with a description of the expected and real behaviour, and we'll be able to help you more than this.
Post your code using the < code/ > button. 
@gritsoonjun
Your replies are not helping the OP and some are completely misleading. I have deleted your replies. If you have your own question please start a new topic of your own after reading the forum guidelines located at the top of every forum section.
Thank you
which IDE Version are you using? 2.x or 1.8.19?
post your code in code tags
post the error message in code tags.
Hello hyunjinny52
Welcome to the worldbest Arduino forum ever.
This is a nice project to get started.
Keep it simple and stupid firstly.
Run some tutorials for the hardware selected.
If you are happy with the results of the tutorials you can merge these to your project.
Have a nice day and enjoy coding in C++.
Hi,
I am back with code ( with a help from chatgpt )
My project is water quality monitoring system for fish tank at home so I am connecting ultrasonic sensor, temperature sensor and ph sensor to arduino
and the code that chatgpt helped me is
// include the libraries for the sensors
#include <phSensor.h>
#include <OneWire.h>
#include <DallasTemperature.h>
// create instances of the sensors
phSensor pH;
OneWire oneWire(2); // set the pin for the temperature sensor
DallasTemperature temperatureSensor(&oneWire);
int ultrasonicTriggerPin = 3; // set the pins for the ultrasonic sensor
int ultrasonicEchoPin = 4;
void setup() {
// initialize serial communication
Serial.begin(9600);
// initialize the sensors
pH.begin();
temperatureSensor.begin();
}
void loop() {
// read the pH value from the sensor
float pHValue = pH.read();
// read the temperature from the sensor
temperatureSensor.requestTemperatures();
float temperatureValue = temperatureSensor.getTempCByIndex(0);
// read the distance from the ultrasonic sensor
digitalWrite(ultrasonicTriggerPin, LOW);
delayMicroseconds(2);
digitalWrite(ultrasonicTriggerPin, HIGH);
delayMicroseconds(10);
digitalWrite(ultrasonicTriggerPin, LOW);
float distanceValue = pulseIn(ultrasonicEchoPin, HIGH) / 58.0;
// print the sensor values to the serial monitor
Serial.print("pH value: ");
Serial.println(pHValue);
Serial.print("Temperature value: ");
Serial.print(temperatureValue);
Serial.println(" degrees Celsius");
Serial.print("Distance value: ");
Serial.print(distanceValue);
Serial.println(" cm");
// wait for 1 second before reading again
delay(1000);
}
after making the code(sensors) work , i need to connect them to the aws .
do I need to put anything for aws in the code?
Your two or more topics on the same or similar subject have been merged.
Please do not duplicate your questions as doing so wastes the time and effort of the volunteers trying to help you as they are then answering the same thing in different places.
Please create one topic only for your question and choose the forum category carefully. If you have multiple questions about the same project then please ask your questions in the one topic as the answers to one question provide useful context for the others, and also you won’t have to keep explaining your project repeatedly.
Repeated duplicate posting could result in a temporary or permanent ban from the forum.
Could you take a few moments to Learn How To Use The Forum
It will help you get the best out of the forum in the future.
Thank you.
Asking chatGPT was a big mistake. Your best advice is in reply #9.
sorry still new to this ! I will try to add from here thanks!!
I am trying that too.. while I struggle, I still need to prepare for my weekly report and show progress
Standard advice:
Ask the robot again until he has provided the correct result expected by you.
It could be 42.
should I knot it? or twist?
@aarg does it need soldering ? I searched up to buy some tmr but in the description, it says solder the terminal strip to the pcb
You can buy versions that are already soldered at the factory. Just do a search.
