I have this code for a automatic watering system but the pump is permanently on, it is on even if the sensor detects humidity and is under 370.
I don't know why it does this but can someone help/ explain it to me?
This is the code, everything else works i have connected the right pins and co.
int b = 1800; //Zeit aus bzw. warten
void setup() {
Serial.begin(9600);
pinMode(analogRead(0),INPUT);
pinMode(13,OUTPUT);
}
void loop() {
if (analogRead(0) >370) {digitalWrite(13,HIGH);
delay(a);}
else if (analogRead(0) <370) {digitalWrite(13,LOW);
delay(b);}
int val = analogRead(0); //connect sensor to Analog 0
Serial.println(val); //print the value to serial port
delay(1000);
}```
You initialized the Analog Channel using:
pinMode(analogRead(0),INPUT);
instead of
pinMode(A0,INPUT);
Thus, a pin is initialized given the result of analogRead(0) instead of initializing A0
Related
i want to record a long data for like 2 to 3 hours using microcontroller Arduino Mega 2560 WI-FI R3 but I got this warning in my code
below is the picture of the warning i got.
enter image description here
the warning come up when I put the time out constant more than 30000 milliseconds
below is the code I used for the Arduino
#include "DHT.h"
// Pin Definitions
#define DHT_PIN_OUT A1
#define DHTTYPE DHT11
#define MQ3_PIN_OUT A2
#define MQ4_PIN_OUT A3
#define MQ7_PIN_OUT A4
// Global variables and defines
// object initialization
DHT dht(DHT_PIN_OUT, DHTTYPE);
// define vars for testing menu
const int timeout = 180000; //define timeout of 1 hour
char menuOption = 0;
long time0;
// Setup the essentials for your circuit to work. It runs first every time your circuit is powered with electricity.
void setup()
{
// Setup Serial which is useful for debugging
// Use the Serial Monitor to view printed messages
Serial.begin(9600);
while (!Serial) ; // wait for serial port to connect. Needed for native USB
Serial.println("start");
dht.begin();
menuOption = menu();
}
// Main logic of your circuit. It defines the interaction between the components you selected. After setup, it runs over and over again, in an eternal loop.
void loop(){
if(menuOption == '1') {
delay(500); //delay 0.5 second
// DHT11 Humidity and Temperature Sensor
// Reading humidity in %
float dhtHumidity = dht.readHumidity();
// Read temperature in Celsius, for Fahrenheit use .readTempF()
float dhtTempC = dht.readTemperature();
float Alcohol = analogRead(MQ3_PIN_OUT);
float Methane = analogRead(MQ4_PIN_OUT);
float CarbonMonoxide = analogRead(MQ7_PIN_OUT);
Serial.print(F("Humidity: ")); Serial.print(dhtHumidity); Serial.print(F("[%]\t"));
Serial.print(F("Temp: ")); Serial.print(dhtTempC); Serial.print(F("[C]\t"));
Serial.print(F("Alcohol: ")); Serial.print(Alcohol); Serial.print(F(" \t"));
Serial.print(F("Methane: ")); Serial.print(Methane); Serial.print(F(" \t"));
Serial.print(F("Carbon Monoxide: ")); Serial.println(CarbonMonoxide); Serial.println(F(" \t"));
}
if (millis() - time0 > timeout){
menuOption = menu();
}
}
// Menu function for selecting the components to be tested
// Follow serial monitor for instrcutions
char menu(){
Serial.println(F("\nSensor Array"));
Serial.println(F("Press (1) to start the sensor array"));
while (!Serial.available());
// Read data from serial monitor if received
while (Serial.available()){
char c = Serial.read();
if (isAlphaNumeric(c))
{
if(c == '1')
Serial.println(F("Now running the sensor array"));
else{
Serial.println(F("illegal input!"));
menuOption = menu();
return 0;
}
time0 = millis();
return c;
}
}
}
sorry for my bad programming and silly question, I'm new to this kind of thing. and I just found out that people usually get answers from StackOverflow, so I just wanted to try asking because I have tried to google the answer but I can't find it.
I am working on my senior project for school, and part of what I need to do is use an HM-19 Bluetooth 5.0 module to connect to another Bluetooth 5.0 module and establish a master slave connection.
I can do that just fine, but when I include the code needed for my ultrasonic sensor to do scan, my commands to my HM-19 don't return anything and I can't do any of the basic functions such as finding connections. I have tested it with and without the ultrasonic sensor code and the problem occurs when I use the sensor portion of the code.
TO BE CLEAR, all I am trying to do is just have my Bluetooth 5.0 chip connect to another and do normal commands while also inputting into my serial monitor a distance when I put my hand in front. THIS IS JUST A TEST, once I get that done I will move to what I really want to do.
IT'S JUST A STARTING POINT IN A PROJECT. I have a function call for my sensor and my bluetooth chip in the void loop, that's all that is in there.
I just want to know how to fix this issue. How can I scan with my ultrasonic sensor and send commands to my Bluetooth module? Any help would be greatly appreciated.
[Here are the results when the sensor is commented][1] and [here are the unsuccessful results that results in an infinite loop where I can't get to the portion of the code that returns what the chip says][2]. Lastly, although most of the links include stuff for the HM-10, the commands are basically the same for the HM-19. I'm adding more because stack overflow won't let me edit this post until there are more characters or something. I hope you have a good day/evening person reading this.
Here is my code:
// SerialIn_SerialOut_HM-10_01
//
// Uses hardware serial to talk to the host computer and AltSoftSerial for communication with the bluetooth module
//
// What ever is entered in the serial monitor is sent to the connected device
// Anything received from the connected device is copied to the serial monitor
// Does not send line endings to the HM-10
//
// Pins
// BT VCC to Arduino 5V out.
// BT GND to GND
// Arduino D8 (SS RX) - BT TX no need voltage divider
// Arduino D9 (SS TX) - BT RX through a voltage divider (5v to 3.3v)
//
#include <AltSoftSerial.h>
AltSoftSerial BTserial;
// https://www.pjrc.com/teensy/td_libs_AltSoftSerial.html
char c=' ';
boolean NL = true;
const int trigPin = 9;
const int echoPin = 10;
float duration, distance;
boolean wait_your_turn = false; //My attempt to make sure the sensor and the Bluetooth module don't interfere with each other
//if I'm sending data from the serial monitor to the bluetooth module and vice versa it switches to true and the bluetooth module
//does its thing, so the sensor doesn't get in the way.
void setup()
{
pinMode(trigPin, OUTPUT);
pinMode(echoPin, INPUT);
Serial.begin(9600);
Serial.print("Sketch: "); Serial.println(__FILE__);
Serial.print("Uploaded: "); Serial.println(__DATE__);
Serial.println(" ");
BTserial.begin(9600);
Serial.println("BTserial started at 9600");
}
void loop()
{
Bluetooth();
Sensor();
}
void Sensor(){
if((wait_your_turn == true))
{}
else
{
Serial.println("Scanning for stuff.");
digitalWrite(trigPin, HIGH);
delayMicroseconds(10);
digitalWrite(trigPin, LOW);
duration = pulseIn(echoPin, HIGH);
distance = (duration*.0343)/2;
if(distance <= 20)
{
Serial.println(distance);
delay(500);
}
}
}
void Bluetooth()
{
if (Serial.available())
{
if(wait_your_turn == false)
Serial.println("Serial is available");
wait_your_turn = true;
while(Serial.available()>0)
c = Serial.read();
Serial.write(c);
if(c!=10&c!=13)
BTserial.print(c);
}
if (BTserial.available())
{
// Serial.print("We are at the bluetooth portion.");
while(BTserial.available())
c = BTserial.read();
Serial.print(c);
wait_your_turn = false;
}
}
[1]: https://i.stack.imgur.com/Dn4i0.png
[2]: https://i.stack.imgur.com/s9Ifv.png
Sorry, I forgot about this question. I figured it out. What I did was have 1 Arduino control the Ultrasonic sensor and send a character to the other Arduino when something was in range of the sensor. The other Arduino would then read the character and based on the character send it would perform an action. Thank you everyone who commented and have a great rest of your days.
I am trying to get my code to show a switch input from a joystick on an Arduino Uno.
When I view it on the serial monitor, I see the x and y axis being displayed when I move the joystick.
When I click it I do not get anything to show up. I have the switch set to pin 2 on the Arduino.
There are no errors when I compile the code.
int pin_x = A0;
int position_x = 0;
int pin_y = A1;
int position_y = 0;
int pin_z = 2; // switch pin
int position_z = LOW;
void setup() {
Serial.begin(9600); // initialize serial communications at 9600 bps
pinMode(pin_x, INPUT); // set pin mod as INPUT
pinMode(pin_y, INPUT);
pinMode(pin_z, INPUT); // switch pin
}
void read(){
position_x = analogRead(pin_x);
position_y = analogRead(pin_y);
position_z = digitalRead(pin_z);
}
void show(){
Serial.print(" X:"); //print information to Serial Monitor
Serial.print(position_x);
Serial.print(" Y:");
Serial.print(position_y);
Serial.print(" Z:");
Serial.print(position_z);
}
void loop() {
read();
show();
delay(500);
}
There are several methods you could use to find the error, here are a couple suggestions:
read the datasheet of your joystick
use a multimeter to check conductivity of the two switch pins
hook something else to your switch input, check that the input is working
That said, the way your code is written it expects your switch pin to be connected to Vcc, check if that is really the case.
Try this:
void setup() {
Serial.begin(9600); // initialize serial communications at 9600 bps
pinMode(pin_x, INPUT); // set pin mod as INPUT
pinMode(pin_y, INPUT);
pinMode(pin_z, INPUT); // switch pin
digitalWrite(pin_z, HIGH);
}
Otherwise code looks correct. The switch on a Joystick is indeed digital, while the others are analog, you got that right.
Here's a video on how to work with joysticks, maybe it helps: https://www.youtube.com/watch?v=MlDi0vO9Evg
I an getting a constant HIGH from 'inputPintwo' on the serial monitor. When 'inputPin' goes HIGH the relay is triggered and works properly because 'inputPintwo' is also HIGH (all the time).
I have a Very similar setup to: 2 PIR motion sensors +Arduino
I am not using pin 0 or 1 like the above answered question. I have replaced the sensor with a different one, in case it was bad hardware. I also unplugged the sensor and it still reads HIGH. The jumper is on retriggering on both sensors.
int ledPin = 13;
int inputPin = 2;
int inputPintwo = 4;
int pirState = LOW;
int val = 0;
int valtwo = 0;
#define RELAY1 7
void setup() {
pinMode(ledPin, OUTPUT);
pinMode(inputPin, INPUT);
pinMode(inputPintwo, INPUT);
pinMode(RELAY1, OUTPUT);
Serial.begin(9600);
}
void loop(){
val = digitalRead(inputPin);
valtwo = digitalRead(inputPintwo);
if (val == HIGH && valtwo == HIGH) {
digitalWrite(ledPin, HIGH);
if (pirState == LOW) {
Serial.println("Motion detected!");
pirState = HIGH;
Serial.println("Light ON");
digitalWrite(RELAY1,1);
delay(500);
digitalWrite(RELAY1,0);
delay(500);
digitalWrite(RELAY1,1);
delay(500);
digitalWrite(RELAY1,0);
delay(500);
digitalWrite(RELAY1,1);
}
}
else {
digitalWrite(ledPin, LOW);
if (pirState == HIGH){
Serial.println("Motion ended!");
digitalWrite(RELAY1,0);
pirState = LOW;
Serial.println("Light OFF");
}
}
}
I expect both sensors to go HIGH only when motion is detected, which will cause the relay to go on and off several times, then stay on until the timer runs out on the sensors.
To identify the problem I recommend you to start with checking the hardware. You will need voltmeter/multimeter.
Double check if you are interfacing the sensor properly (check datasheet). Didn't you forget to connect e.g. the pull-down resistors?
Check power supply voltage on sensors – is the voltage within
manufacturer specifications?
Check breadboard connections if you are using one.
Check sensor output behaviour (voltage), if there is or is not a movement. Is the voltage constant or not? Constant voltage means that PIR sensor is NOT working properly. Before performing of this test disconnect output from Arduino input.
If everything seems OK or you do not have voltmeter, try to disconnect the PIR sensor and connect a wire between Arduino pin 4 and ground. Does digitalRead(inputPintwo) return LOW? If yes, you know that reading of the pin state works fine.
Below please see some recommendations related to your code:
use #define directive or static const int variable type to define Arduino pins as you do it with relay output pin RELAY1.
Example:
#define LED_PIN 13
#define INPUT_PIN 2
#define INPUT_PINTWO 4
or
static const int ledPin = 13;
static const int inputPin = 2;
static const int inputPintwo = 4;
In your case, where you are only interested in digital value (LOW/HIGH), use built pull-up resistor on the input pins. Thus the log. voltage level on the floating input pin is defined (HIGH). If you do not use pull-up resistors, voltage can be either log. 0 (LOW) or log. 1 (HIGH), what can lead to strange program/state machine behaviour
To activate pull-up resistors in the input pins, use
pinMode(inputPin, INPUT_PULLUP);
pinMode(inputPintwo, INPUT_PULLUP);
I am trying to create a sound meter to measure the decibels in a room and I am currently using a nodemcu 12e as I want to insert those measures to a row in a mySQL server and a "big sound module" (https://tkkrlab.nl/wiki/Arduino_KY-038_Microphone_sound_sensor_module).
The only thing I have achieved so far is to get the raw values of the sensor, as they don't seem to change, although I have tried to adjust the gain turning the screw in the microphone, with no result, as it seems to stay in the same values even when playing loud music.
It seems to react to loud noises, and clapping makes the output to spike up - allowing me to control that lighting up the connected led:
#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266WebServer.h>
#include <ESP8266mDNS.h>
const char* ssid = "yourssid";
const char* password = "yourpass";
ESP8266WebServer server(80);
const int led = 13;
int sensorPin = A0; // select the input pin for the potentiometer
int ledPin = D7; // select the pin for the LED
int sensorValue = 0; // variable to store the value coming from the sensor
void setup(void){
pinMode(led, OUTPUT);
digitalWrite(led, 0);
Serial.begin(115200);
WiFi.begin(ssid, password);
Serial.println("");
// Wait for connection
while (WiFi.status() != WL_CONNECTED) {
delay(500);
Serial.print(".");
}
Serial.println("");
Serial.print("Connected to ");
Serial.println(ssid);
Serial.print("IP address: ");
Serial.println(WiFi.localIP());
if (MDNS.begin("esp8266")) {
Serial.println("MDNS responder started");
}
});
//SETUP SOUND SENSOR
pinMode (ledPin, OUTPUT);
}
void loop(void){
sensorValue = analogRead (sensorPin);
Serial.println (sensorValue);//, DEC);
if (sensorValue > 100){
digitalWrite (ledPin, HIGH);
delay (1000);
digitalWrite (ledPin, LOW);
}
}
I am reading the analog value of the sensor and I tried to get the lower values possible as seen I was trying to calibrate the mic. The values I am constantly getting are between 19 and 20:
As you can see, on clapping I get a spike of the value.
The thing is that the values don't change at all when loud music is playing, only getting different values when it detects a loud noise (like clapping). How can I change the code or system to get the values in decibels?
You might not get this running with this microphone module.
The mdule act as a switch. The switching threshold is set by the potentiometer on board of the microphone module.
What you would need is a low-level amlified microphone. Then you would get an input range from 0 (no noise) to 1023 (loud noise). This value then could be mapped to decibel. But again - not with this module.
Regards
Harry
To read a stream of audio signal via analog0 input you need a board that has an analog output. The board you're using has a Digital output which outputs a signal whenever it's threshold it's exceed the limit you set on the potentiometer (yes the potentiometer you were moving just set the limit when the microphone will output a digital pulse).
So you have you should purchase another microphone like this one.
The one you have only tells you if there is sound or no sound.