I have written a simple arduino sketch to read the value from a pin using the analogRead(0) function for reading pin 0.
When verifying the code I get the error message -
'analogread' was not declared in this scope.
I have read somewhere that analogRead was superseded by HAL, but I can not find anywhere what should replace analogRead if it is not supported anymore.
Any help/advice would be great and much appreciated.
I have no included libraries in my sketch, maybe this is the reason but I can find an examples that require #include of any library.
The code in my sketch is as follows:
int fsrPin = 0; // the FSR and 10K pulldown are connected to a0
int fsrReading; // the analog reading from the FSR resistor divider
void setup(void) {
// We'll send debugging information via the Serial monitor
Serial.begin(9600);
}
void loop(void) {
fsrReading = analogRead(0);
Serial.print("Analog reading = ");
Serial.print(fsrReading); // the raw analog reading
// We'll have a few threshholds, qualitatively determined
if (fsrReading < 10) {
Serial.println(" - No pressure");
} else if (fsrReading < 200) {
Serial.println(" - Light touch");
} else if (fsrReading < 500) {
Serial.println(" - Light squeeze");
} else if (fsrReading < 800) {
Serial.println(" - Medium squeeze");
} else {
Serial.println(" - Big squeeze");
}
delay(1000);
}
This was a silly mistake of mine.
The code is case sensitive and the actual code is analogRead and not analogread
Related
I wrote this program to check some things m but for me it is not working
` #define outputA 7
#define outputB 3
int counter = 0;
int aState;
int aLastState;
int StateAreTheSamePrinted = 0;
int StatePrinted = 0;
void setup() {
// put your setup code here, to run once:
pinMode(outputA, INPUT);
pinMode(3, INPUT);
Serial.begin(115200);
aLastState = digitalRead(outputA);
Serial.print("Arduino started");
}
void loop() {
// put your main code here, to run repeatedly:
aState = digitalRead(outputA);
if(StatePrinted == 0)
{
Serial.print(aState);
StatePrinted = 1;
}
if(aState == aLastState && StateAreTheSamePrinted == 0)
{
Serial.print("States are the same");
StateAreTheSamePrinted = 1;
}
if(aState != aLastState)
{
if(aState == 1){
Serial.print("A is high \n");
}
else
{
Serial.print("A is low \n");
}
StateAreTheSamePrinted = 0;
StatePrinted = 0;
}
aLastState = aState;
}
It always prints once arduino started, 1 (state of input), and states are the same, when I wire 5v from arduino into port 7, sometimes it react once, sometimes n ot, after few minutes it start priting output like 50-100 lines of messages and stops and lags again. Does anyone got into this problem?
`
I was expecting that after giving power into arduino 7 port it would print A is high or A is low and toggle between them
Sounds like you need to "debounce" after the state changes. When you hook 5v into the pin, it might not make a stable connection right away so it changes state very quickly a few times. A simple fix is to put a ~10ms delay after it detects a state change.
I've been digging this for around a week and doesn't have any way to solve this one. My Arduino code is working for a while (few times / few days) and then stops all of a sudden. I'm trying to implement a WebClient within the Arduino which sends HTTP GET requests to some other server every time (periodically - every 90 seconds) when a motion had been detected / when motion had stopped.
Below you can find the code. Can anyone assist?
#include <Ethernet2.h>
#include <SPI.h>
byte mac[] = { 0x90, 0xA2, 0xDA, 0x10, 0x73, 0x88 };
IPAddress ip(192,168,20,84);
IPAddress server(192,168,50,93); // Google
IPAddress myDns(8, 8, 8, 8);
EthernetClient client;
//getMovement - sends a GET request when motion is detected
void getMovement() {
client.stop();
if (client.connect(server, 8080)) {
client.println("GET /GetARoomMaven/motion?roomId=1&movement=1");
client.println();
Serial.println("Movement Request Sent");
} else {
Serial.println("connection failed");
}
}
//getNoMovement - sends a GET request when motion had stopped
void getNoMovement() {
client.stop();
if (client.connect(server, 8080)) {
client.println("GET /GetARoomMaven/motion?roomId=1&movement=0");
client.println();
Serial.println("Movement Request Sent");
} else {
Serial.println("connection failed");
}
}
//VARS
//the time we give the sensor to calibrate (10-60 secs according to the datasheet)
int calibrationTime = 10;
//the time when the sensor outputs a low impulse
long unsigned int lowIn;
//the amount of milliseconds the sensor has to be low
//before we assume all motion has stopped
long unsigned int pause = 90000;
//
boolean lockLow = true;
boolean takeLowTime;
int pirPin = 2; //the digital pin connected to the PIR sensor's output
int ledPin = 13;
/////////////////////////////
//SETUP
void setup(){
Serial.begin(9600);
pinMode(pirPin, INPUT);
pinMode(ledPin, OUTPUT);
digitalWrite(pirPin, LOW);
Ethernet.begin(mac);
//give the sensor some time to calibrate
Serial.print("calibrating sensor ");
for(int i = 0; i < calibrationTime; i++){
Serial.print(".");
delay(1000);
}
Serial.println(" done");
Serial.println("SENSOR ACTIVE");
delay(50);
loop();
}
////////////////////////////
//LOOP
void loop(){
if(digitalRead(pirPin) == HIGH){
digitalWrite(ledPin, HIGH); //the led visualizes the sensors output pin state
if(lockLow){
//makes sure we wait for a transition to LOW before any further output is made:
lockLow = false;
Serial.print("motion detected at ");
Serial.print(millis()/1000);
Serial.println(" sec");
getMovement();
}
takeLowTime = true;
}
if(digitalRead(pirPin) == LOW){
digitalWrite(ledPin, LOW); //the led visualizes the sensors output pin state
if(takeLowTime){
lowIn = millis(); //save the time of the transition from high to LOW
takeLowTime = false; //make sure this is only done at the start of a LOW phase
}
//if the sensor is low for more than the given pause,
//we assume that no more motion is going to happen
if(!lockLow && millis() - lowIn > pause){
//makes sure this block of code is only executed again after
//a new motion sequence has been detected
lockLow = true;
Serial.print("motion ended at "); //output
Serial.print((millis() - pause)/1000);
Serial.println(" sec");
getNoMovement();
}
}
}
It's hard to say without a better description of symptoms.
Are the LED still blinking ?
If yes, the socket code seems wrong to me:
void getMovement() {
client.stop();
You must remember that TCP requires connection tracking, so you can't immediately stop a socket, it has to linger a bit for acknowledging packets sent.
If you look at the implementation:
void EthernetClient::stop() {
if (_sock == MAX_SOCK_NUM)
return;
[...]
}
stop() will fail if you have more than MAX_SOCK_NUM (which is 4 on your platform) opened at a time. Can this happen?
In all case, you should avoid as much as possible dynamic allocations, you should have a single function sendMovement(bool detected) that's writing the detected value (getMovement and getNoMovement are the same function, so factorize them). You should re-use the client as much as possible (avoid closing the socket and re-opening it unless you get an error from any socket function). Finally, you might want to set up an interrupt on the digital input pin (with some software debouncing) to avoid polling on it, that would release CPU, and, depending on the configuration, might release more time to process SPI messages.
If the LED are not blinking, try to comment out the SPI related code (EthernetClient's code) and check if it works (in that case, I would check the HW for errors, some of the socket code is busy looping (socket::send does this) that would never finish and stop your loop function from progressing. In that case, if you use JTAG to pause the CPU, it'll be in the client.connect or client.println method.
If it still does not work (LED not blinking with no SPI code), then the issue is likely hardware, check voltage / temperature / JTAG connect to the board to interrupt the CPU to figure out where it's struck.
BTW, if you are doing HTTP, the request is wrong and should be:
GET url HTTP/1.1\r\n
Host: yourserverhost.com\r\n
Connection: Keep-Alive\r\n
\r\n
The part HTTP/1.x after the GET url is absolutely required even for HTTP/1.0. Unless you've written your own server (in that case, there's no need to mimick HTTP), it should not work at all, not even once.
Please bear with me. I am an amateur programmer at Arduino, and have never used Particle photon before.
I used an Arduino Uno and wrote the attached code that detects heart beat and temperature using the Grove Ear clip heart beat sensor and the Grove Temperature sensor and then prints them in the console every 20 seconds. Previously, this code was written to show in an Grove OLED screen but later simplified it back to using it without the OLED screen.
I am now looking into using the same application and function using the same sensor on a Particle Photon (as it is smaller and has WiFi capability). I have never previously used this technology before but I saw online that it, more or less, uses the same code application. I have been through the sample codes for this online available on its website but I have no idea how to convert my code for the Arduino into code for the photon (Photon console compiles the code without any error but does not show any sensor data). Can someone either point me to the right direction/ appropriate online resources / help me change this code here to make it work on the Photon? (I just added the Particle.publish() wherever I was using Arduino's Serial.println() but it still doesn't print anything).
The result in the console shows:
Please be ready
This will now begin
then it prints number 1 to 20 every second followed by sensor readings.
Again sorry for the inconvenience and thank you for your help.
I used direct codes from the documentation blog of the sensors (bottom of the page of the linked page):
Grove heart bear sensor
Grove Temperature sensor
#define LED 4//indicator, Grove - LED is connected with D4 of Arduino
boolean led_state = LOW;//state of LED, each time an external interrupt
//will change the state of LED
float tempa;
int tempPin = 0;
unsigned char counter;
unsigned long temp[21];
unsigned long sub;
bool data_effect=true;
unsigned int heart_rate;//the measurement result of heart rate
const int max_heartpluse_duty = 2000;//you can change it follow your system's request.
//2000 meams 2 seconds. System return error
//if the duty overtrip 2 second.
void setup()
{
pinMode(LED, OUTPUT);
Serial.begin(9600);
while (!Serial){
;
}
Serial.println("Please be ready");
delay(5000);
arrayInit();
Serial.println("This will now begin.");
attachInterrupt(0, interrupt, RISING);//set interrupt 0,digital port 2
}
void loop()
{
digitalWrite(LED, led_state);//Update the state of the indicator
}
/*Function: calculate the heart rate*/
void sum()
{
if(data_effect)
{
heart_rate=1200000/(temp[20]-temp[0]);//60*20*1000/20_total_time
Serial.print("Heart_rate_is:\t");
Serial.println(heart_rate);
tempa = analogRead(tempPin);
tempa = tempa * 0.11;
Serial.print("Body Temperature = ");
Serial.print(tempa);
Serial.print("*C");
Serial.println();
delay(1000);
}
data_effect=1;//sign bit
}
/*Function: Interrupt service routine.Get the sigal from the external interrupt*/
void interrupt()
{
temp[counter]=millis();
Serial.println(counter,DEC);
switch(counter)
{
case 0:
sub=temp[counter]-temp[20];
break;
default:
sub=temp[counter]-temp[counter-1];
break;
}
if(sub>max_heartpluse_duty)//set 2 seconds as max heart pluse duty
{
data_effect=0;//sign bit
counter=0;
Serial.println("measurement error,test will restart!" );
arrayInit();
}
else if (counter==20&&data_effect)
{
counter=0;
sum();
}
else if(counter!=20&&data_effect)
{
counter++;
}
else
{
counter=0;
data_effect=1;
}
}
/*Function: Initialization for the array(temp)*/
void arrayInit()
{
for(unsigned char i=0;i < 20;i ++)
{
temp[i]=0;
}
temp[20]=millis();
}
I am Working on an Arduino mini project. its to design an automatic room light controller using IR modules and arduino UNO R3. Before coming to my question i'd explain it a bit .Its like an arduino is connected to an IR module and a counter keeps count of people entering the room, when the room is empty light turns off automatically.But my Code isnt working the way im expecting it to work. . given below is the code for my mini project.
#define x 14 // x sensor 1
#define y 19 // y sensor 2
#define relay 2 // relay for output
int count = 0; // initialisation
// void IN() //{ count ++;} // void OUT() // { cout--; // }
void setup()
{
// put your setup code here, to run once:
pinMode(x, INPUT);
pinMode(y, INPUT);
pinMode(relay, OUTPUT);
}
void loop()
{
// put your main code here, to run repeatedly:
if(digitalRead(x)) //IN();
{
count++;
}
if (digitalRead(y)) // OUT();
{
count--;
}
if (count <= 0) {
digitalWrite(relay, LOW);
delay(20);
}
else
digitalWrite(relay, HIGH);
}
The problem with my code is that the transmitter and receiver sense interference both at the same time resulting in turning of the light while the person is still inside the room.As im new to arduino need your inputs.
I'm trying to use data sent via Bluetooth from a mobile app to the Arduino. There will be 2 strings received dependent on the function required.
First function: When the string "ledon" or "ledoff" received turn on or turn off an led.
Second Function: from the app I get the data a user has typed into 2 boxes, one a text box the other a password box, this is received by the Arduino as one string with comma's as a delimiter so the string can be separated into it's component parts, which in this case are an "ssid name" and a "network key". These details I will be intending to write to an onboard sd card so that the wifi module will be able to logon to the network that the ssid and network key are relevant too.
So far I can get the led light to do as it should, I can also get the string read, separated by the delimiter and printed out to the serial monitor. However when I try to combine the two codes the led function fails to turn on or off the led light although the correct command is printed into the serial monitor. I have researched how to solve this trying each requirement as a standalone function and calling them in the loop section, which individually they work but when called together again the led fails to come on.
This is the code i'm presently using:
const int ledPin = 11;
String readString;
void setup() {
Serial.begin(9600);
pinMode (ledPin, OUTPUT);
}
void loop() {
while (Serial.available()) {
delay(3);
char c = Serial.read();
readString += c;
}
//turns led on or off
if (readString.length() >0) {
Serial.println(readString);
if (readString == "ledon")
{
digitalWrite (ledPin, HIGH);
}
if (readString == "ledoff")
{
digitalWrite (ledPin, LOW);
}
readString="";
//seperates the string into 2 lines using the delimiter ","
String first = Serial.readStringUntil(',');
Serial.read(); //next character is comma, so skip it using this
String second = Serial.readStringUntil(',');
Serial.read();
Serial.println(first);
Serial.println(second);
readString="";
}
}
If I comment out the string part of the code the led turns on and off fine, if I try and run the code as is the code prints everything you would expect but the led doesn't come on.
I'm pretty new to Arduino,c and c++ and I cannot seem to figure this out so any help would be great.
The app I'm using to control this is being built in Mit's App Inventor 2
I have finally resolved this.
I decided to look at other logical steps to find a solution.
I considered the issue could be having different strings that did different things which may be conflicting in some way.
In my research I found reference to the fact that the Bluetooth module HC-05 has 2 pins that in my case were not being utilised, the key pin and the state pin, in this stack overflow discussion Tell when Bluetooth module connects on Arduino and decided this logic of using the "State pin" to signify Bluetooth connection would negate the possibility of any conflicts within the String logic.
Once I had figured out the best way to place and order the "where" statements I managed to get the functionality at this point in my project which then allows me to move on to the next step in the development.
The code I have now arrived at:
const int ledPin1 = 11;
const int ledPin2 = 4;
String readString;
boolean BTconnected = false;
void setup() {
Serial.begin(9600);
pinMode (ledPin1, OUTPUT);
pinMode (ledPin2, INPUT);
}
void loop() {
while (!BTconnected)
{
if ( digitalRead(ledPin2)==HIGH) { BTconnected = true;};
}
digitalWrite(ledPin1, HIGH);
Serial.println("HC-05 is now connected");
Serial.println("");
while (BTconnected)
{
if ( digitalRead(ledPin2)==LOW) { BTconnected = false;
digitalWrite(ledPin1, LOW);
Serial.println("HC-05 is now disconnected");
Serial.println("");
};
while (Serial.available())
{
delay(3);
char c = Serial.read();
readString += c;
}
if (readString.length() >0) {
//Serial.println(readString);
//readString="";
String first = Serial.readStringUntil(',');
Serial.read(); //next character is comma, so skip it using this
Serial.println(first);
//readString="";
String second = Serial.readStringUntil(',');
Serial.read();
Serial.println(second);
Serial.println("");
//readString="";
}
}
}