I've been working to save data from an accelerometer sensor to a text file. But after searching the web for several hours, the methods I've found haven't worked. Here is the program I have now.
// Accelerometer sensor program
const int ar1 = A5;
const int ar2 = A4;
const int ar3 = A3;
int x = 0;
int ov1 = 0;
int y = 0;
int ov2= 0;
int z = 0;
int ov3= 0;
void setup() {
// initialize the communications
Serial.begin(9600);
}
void loop() {
analogReference(EXTERNAL); //connect 3.3v to AREF
// X axis
// Read the analog
x = analogRead(ar1);
// Range of analog out
ov1 = map(x, 0, 1023, 0, 255);
delay(2);
// Y axis
y = analogRead(ar2);
ov2 = map(y, 0, 1023, 0, 255);
// Z axis
delay(2);
z = analogRead(ar3);
ov3 = map(z, 0, 1023, 0, 255);
// Should print to the monitor
// Output for X axis
Serial.print("Xsensor1 = " );
Serial.print(x);
Serial.print("\t output1 = ");
Serial.println(ov1);
// Output for Y axis
Serial.print("Ysensor2 = " );
Serial.print(y);
Serial.print("\t output2 = ");
Serial.println(ov2);
// Output for Z axis
Serial.print("Zsensor3 = " );
Serial.print(z);
Serial.print("\t output3 = ");
Serial.println(ov3);
// Should repeat every second
delay(1000);
What I've found does seem to do what I want, the issue is that Arduino doesn't want to run it, saying that 'import' was not declared in the scope. I've tried installing some libraries, but I couldn't find the exact library that import is part of, or PrintWriter for that matter. Here is the code causing issues:
import processing.serial.*;
Serial mySerial;
PrintWriter output;
void setup() {
mySerial = new Serial( this, Serial.list()[0], 9600 );
output = createWriter( "data.txt" );
}
void draw() {
if (mySerial.available() > 0 ) {
String value = mySerial.readString();
if ( value != null ) {
output.println( value );
}
}
}
void keyPressed() {
output.flush(); // Writes the remaining data to the file
output.close(); // Finishes the file
exit(); // Stops the program
}
Thanks in advance.
The code you have isn't for the Arduino but is written in a language called Processing. It will run on your PC and collect the data from the Arduino to be saved to a file. You need to download the Processing IDE to compile the code and run it.
Related
i'm trying to do a communication over ethernet using ENC28J60 and Arduino Uno and run 3 task . I have a little problem with my arduino code. My code is compiling but i get the following error : "Low memory available, stability problems may occur." and the led on the board is blinking very fast. I guess that the board is trying to alocate memory but he faild. Any idea what can i do ?
#include <Arduino_FreeRTOS.h>
#include "HX711.h"
#include <PID_v1.h>
#include <string.h>
//#include <SPI.h>
#include <UIPEthernet.h>
#define configUSE_IDLE_HOOK 0
// FreeRTOS tasks
void TaskPrimaryControlLoop(void *pvParameters);
void TaskConcentrationControlLoop(void *pvParameters);
void TaskIdle(void *pvParameters);
/* Weigth Cells */
#define hx_pf_dout 3
#define hx_pf_clk 2
#define hx_c_dout 5
#define hx_c_clk 4
HX711 pf_scale(hx_pf_dout, hx_pf_clk);
HX711 c_scale(hx_c_dout, hx_c_clk);
float pf_factor = -236000;
float c_factor = -203000;
float p_weigth = 0; // (kg, 0.000) primary liquid weigth
float p_l_weigth = 0; // (kg, 0.000) primary liquid last weigth
float c_weigth = 0; // (kg, 0.000) concentrate liquid weigth
float c_l_weight = 0; // (kg, 0.000) concentrate liquid last weigth
/* h bridge config */
#define speed_p 9
#define forward_p 7
#define backward_p 8
#define speed_c 6
#define forward_c A0
#define backward_c A1
double p_pump = 0; // 0-255 pwm pump output
double c_pump = 0; // 0-255 pwm pump output
//// PID parameters
// Primary Control Loop
#define p_kp 250.0
#define p_ki 25.0
// Concentration Control Loop
#define c_kp 250.0
#define c_ki 25.0
double p_pv = 0; // (%) primary flow value
double c_pv = 0; // (%) concentration flow value
double p_sp = 0; // (l/min) primary flow setpoint
double c_sp_proc = 0; // % concentration
double c_sp = 0; // (l/min) concentration setpoint
PID pid_pcl(&p_pv, &p_pump, &p_sp, p_kp,p_ki,0.0, DIRECT);
PID pid_ccl(&c_pv, &c_pump, &c_sp, c_kp,c_ki,0.0, DIRECT);
/* Communication Ethernet */
#define MAX_STRING_LEN 32
const byte numChars = 32;
char receivedChars[numChars];
boolean newData = false;
byte mac[] = {
0xDE, 0xAD, 0xBE, 0xEF, 0xFE, 0xED
};
IPAddress ip(192, 168, 1, 2);
IPAddress myDns(192,168,1, 1);
IPAddress gateway(192, 168, 1, 1);
IPAddress subnet(255, 255, 255, 0);
// telnet defaults to port 23
EthernetServer server(23);
//EthernetClient client;
boolean alreadyConnected = false; // whether or not the client was connected previously
void setup() {
Serial.begin(9600);
while (!Serial) {
; // wait for serial port to connect. Needed for native USB, on LEONARDO, MICRO, YUN, and other 32u4 based boards.
}
pinMode(forward_p, OUTPUT);
pinMode(backward_p, OUTPUT);
pinMode(forward_c, OUTPUT);
pinMode(backward_c, OUTPUT);
pinMode(speed_p, OUTPUT);
pinMode(speed_c, OUTPUT);
digitalWrite(backward_p, HIGH);
digitalWrite(backward_c, HIGH);
digitalWrite(forward_p, LOW);
digitalWrite(forward_c, LOW);
pf_scale.set_scale(pf_factor);
c_scale.set_scale(c_factor);
//pf_scale.tare();
//c_scale.tare();
pid_ccl.SetMode(AUTOMATIC);
pid_pcl.SetMode(AUTOMATIC);
xTaskCreate(
TaskPrimaryControlLoop
, (const portCHAR *)"PrimaryControlLoop" // A name just for humans
, 128 // This stack size can be checked & adjusted by reading the Stack Highwater
, NULL
, 2 // Priority, with 3 (configMAX_PRIORITIES - 1) being the highest, and 0 being the lowest.
, NULL );
xTaskCreate(
TaskConcentrationControlLoop
, (const portCHAR *)"ConcentrationControlLoop" // A name just for humans
, 128 // This stack size can be checked & adjusted by reading the Stack Highwater
, NULL
, 2 // Priority, with 3 (configMAX_PRIORITIES - 1) being the highest, and 0 being the lowest.
, NULL );
xTaskCreate(
TaskIdle
, (const portCHAR *)"Idle" // A name just for humans
, 512 // This stack size can be checked & adjusted by reading the Stack Highwater
, NULL
, 0 // Priority, with 3 (configMAX_PRIORITIES - 1) being the highest, and 0 being the lowest.
, NULL );
}
void loop() {
}
void TaskPrimaryControlLoop(void *pvParameters)
{
//(void) pvParameters;
for (;;)
{
p_weigth = pf_scale.get_units(1);
p_pv = (p_l_weigth - p_weigth)*100;
if(p_pv < 0) p_pv = 0;
pid_pcl.Compute();
analogWrite(speed_p, p_pump);
p_l_weigth = p_weigth;
vTaskDelay(200 / portTICK_PERIOD_MS); // 200 ms sample time
}
}
void TaskConcentrationControlLoop(void *pvParameters)
{
//(void) pvParameters;
for (;;)
{
c_weigth = c_scale.get_units(1);
c_pv = (c_l_weight - c_weigth)*100;
if(c_pv < 0) c_pv = 0;
c_sp = p_sp * (c_sp_proc/100);
pid_ccl.Compute();
analogWrite(speed_c, c_pump);
c_l_weight = c_weigth;
vTaskDelay(200 / portTICK_PERIOD_MS); // 200 ms sample time
}
}
void TaskIdle(void *pvParameters)
{
//(void) pvParameters;
for(;;){
EthernetClient client = server.available();
// when the client sends the first byte, say hello:
if (client) {
if (!alreadyConnected) {
client.flush();
//Serial.println("We have a new client");
//client.println("Hello, client!");
alreadyConnected = true;
}
}
recvWithStartEndMarkers();
//showNewData();
if(receivedChars[0] == 's'){
p_sp = atof(subStr(receivedChars, ",", 2));
c_sp_proc = int(subStr(receivedChars, ",", 3));
newData = false;
memset(receivedChars, 0, sizeof(receivedChars));
}
// send process values to application
if(receivedChars[0] == 'w'){
Serial.print(p_pv);
Serial.print(",");
Serial.print(p_sp);
Serial.print(",");
Serial.print(int(c_pump));
Serial.print(",");
Serial.print(c_pv);
Serial.print(",");
Serial.print(c_sp);
Serial.print(",");
Serial.print(int(p_pump));
Serial.println();
newData = false;
memset(receivedChars, 0, sizeof(receivedChars));
}
/*
// check commands
while(Serial.available() > 7){
p_sp = Serial.parseFloat();
c_sp_proc = Serial.parseInt();
}
newData = false;
memset(receivedChars, 0, sizeof(receivedChars)
*/
newData = false;
memset(receivedChars, 0, sizeof(receivedChars));
vTaskDelay(1);
}
}
void recvWithStartEndMarkers() {
static boolean recvInProgress = false;
static byte ndx = 0;
char startMarker = '<';
char endMarker = '>';
char rc;
EthernetClient client = server.available();
while (client.available() > 0 && newData == false) {
rc = client.read();
if (recvInProgress == true) {
if (rc != endMarker) {
receivedChars[ndx] = rc;
ndx++;
if (ndx >= numChars) {
ndx = numChars - 1;
}
}
else {
receivedChars[ndx] = '\0'; // terminate the string
recvInProgress = false;
ndx = 0;
newData = true;
}
}
else if (rc == startMarker) {
recvInProgress = true;
}
}
}
float mapfloat(float x, float in_min, float in_max, float out_min, float out_max)
{
return (x - in_min) * (out_max - out_min) / (in_max - in_min) + out_min;
}
// Function to return a substring defined by a delimiter at an index
char* subStr (char* str, char *delim, int index) {
char *act, *sub, *ptr;
static char copy[MAX_STRING_LEN];
int i;
// Since strtok consumes the first arg, make a copy
strcpy(copy, str);
for (i = 1, act = copy; i <= index; i++, act = NULL) {
//Serial.print(".");
sub = strtok_r(act, delim, &ptr);
if (sub == NULL) break;
}
return sub;
}
First thing to do is try to increase the stack depth of your Tasks.
You're currently using 128, 128 and 512.
You can use "StackHighWaterMark" to get the info about the amount of stack space remaining. Try to use this information to "calibrate" the depth of your task. I recommend using at least 40% of free space.
In order to save space in the Arduino memory you can put all the Serial.print in the flash memory, try to use this syntax:
Serial.print(F(","));
Basically you have to add an F in front of the string that you want to print, but you can't do that when you print a variable:
Serial.print(int(c_pump)); // you can't do that here
Some students from my school are working on a project to measure vibrations (eg. earthquakes) and print the results from two sensors (Piezo knock and vibration sensor) to lcd shield. They probably compiled some codes from the internet. Their original code was like this:
#include <LiquidCrystal.h>
LiquidCrystal lcd(12, 11, 5, 4, 3, 2);
int referansDegeri = 800;
int knockSensor = 0;
int val = 0;
int sensorLevel = map;
int statePin = LOW;
int THRESHOLD = 100;
const int analogPin = A0;
int vib_pin=7;
void setup()
{
int sensorReading = analogRead(analogPin);
// map the result to a range from 0 to the number of LEDs:
int sensorLevel = map(sensorReading, 0, 1023, 0, sensorCount);
pinMode(vib_pin,INPUT);
Serial.begin(9600);
}
void loop()
{
int sensorDegeri = analogRead(A0);
Serial.print(sensorDegeri); //Okuduğumuz değer ekrana yazdırılıyor
if (sensorDegeri >= referansDegeri){
Serial.println("siddetli sarsinti");
}
else{
Serial.println("dusuk sarsinti");
}
delay(1);
}
val = analogRead(knockSensor);
if (val >= THRESHOLD) {
statePin = !statePin;
digitalWrite(ledPin, statePin);
Serial.println("Knock!");
delay(100);
int val;
val=digitalRead(vib_pin);
if(val==1)
{
digitalWrite(led_pin,HIGH);
delay(1000);
digitalWrite(led_pin,LOW);
delay(1000);
}
else
digitalWrite(led_pin,LOW);
}
This code gave this error (exit status):
'sensorCount' was not declared in this scope
Knowing that the students have one knock sensor, I changed the sensorCount to 1 while mapping it so it would seem
int sensorLevel = map(sensorReading, 0, 1023, 0, 1);
then it started giving this error (exit status):
'val' does not name a type
I made some search however, could not find a specific result so cannot fix the problem. But I believe it is important to mention that students were using LED Bar Graph previously, alongside LCD shield, but they have now removed it.
I am trying to control a few (8 for now) servo motors using this 16-channel board. I am running to some issues about accuracy, for example, when moving a couple of motors do draw a diagonal line, because of the delay between each servo, each motor will move in different timing resulting in incorrect drawings.
I am not sure about how to drive the motors in the fastest way in therms of code.
Where to set delays, the baud rate settings for this application, etc. I couldn't find a good example using all channels with minimum delay. In my case, messages are coming from serial, as explained in the code comment.
Is this the right way to drive this board channels?
I am using an arduino uno, but I would like to check if using a Teensy 3.2 results in best performances for this application.
Thanks in advance for any suggestions.
#include <Wire.h>
#include <Adafruit_PWMServoDriver.h>
//#define SERVOMIN 150
//#define SERVOMAX 600
// temporary setting pins for 4 lights - it will be controlled by some decade counter...
//#define L1 4
//#define L2 7
//#define L3 8
//#define L4 10
#define L1 9
#define L2 10
#define L3 11
#define L4 12
/*
* a "pointer" device includes a light and 2 servos. Parameters from serial are:
* index,light,servo1,servo2; <- parameters separated by ',' end of pointer is ';'
*
* example of how serial is coming containing instructions for 4 pointers;
0,0,180,180;1,0,0,0;2,0,180,180;3,0,0,0;
0,0,90,90;1,0,90,90;2,0,90,90;3,0,90,90;
**most of the time these instructions doesn't come all for 4 pointers.
ex:
1,0,12,12;4,255,100,100;
**sometimes it comes only id and light parameter.
0,255;1,0;
(instructions only to turn light on/off)
*/
//values for 8 servos:
const uint8_t SERVOMIN[] = {150, 130, 150, 130, 150, 130, 150, 130};
const uint8_t SERVOMAX[] = {600, 500, 600, 500, 600, 500, 600, 500};
//boards (for now, only one board = 16 servos)
Adafruit_PWMServoDriver pwm [] = {
Adafruit_PWMServoDriver(0x40)
};
uint8_t servonum = 0;
uint8_t activeServos = 4; //not being used now
char buf [4]; //maybe too long
uint16_t currentPointer [4]; //index//light//servo1//servo2
byte lightPin [4] = {L1, L2, L3, L4};
uint8_t lightstatus [4] = {0, 0, 0, 0};
//debug
String inputString = ""; // a string to hold incoming data
boolean stringComplete = false; // whether the string is complete
boolean feedback = false;
void setup() {
//temporally as digital outputs
pinMode(L1, OUTPUT);
pinMode(L2, OUTPUT);
pinMode(L3, OUTPUT);
pinMode(L4, OUTPUT);
Serial.begin(115200);//230400 //115200 //57600 //38400 ?
for ( uint8_t i = 0; i < sizeof(pwm); i++) {
pwm[i].begin();
pwm[i].setPWMFreq(60);
}
}
void loop() {
reply();
}
void reply() {
if (stringComplete) {
if (feedback) Serial.println(inputString);
// clear the string:
inputString = "";
stringComplete = false;
for ( int i = 0; i < sizeof(buf); ++i ) buf[i] = (char)0;
}
}
void serialEvent() {
static byte ndx = 0;
static int s = 0;
while (Serial.available()) {
char rc = (char)Serial.read();
inputString += rc;
//(2) setting pointer parameter
if ( rc == ',') {
setPointer(s);
s++;
for ( int i = 0; i < sizeof(buf); ++i ) buf[i] = (char)0;
ndx = 0;
}
//(3) end of this pointer instruction
else if (rc == ';') {
setPointer(s);
//executePointer(); //plan B
ndx = 0;
s = 0;
for ( int i = 0; i < sizeof(buf); ++i ) buf[i] = (char)0;
}
//(4) end of command line
else if (rc == '\n') {
//p = 0;
s = 0;
stringComplete = true;
}
//(1) buffering
else {
buf[ndx] = rc;
ndx++;
}
}
}
void setPointer(int s) {
//index//light//servo1//servo2
int value;
value = atoi(buf);
//index
if (s == 0) {
if (feedback) {
Serial.print("index:");
Serial.print(value);
Serial.print(", buf:");
Serial.println(buf);
}
currentPointer[0] = value;
}
//light
else if (s == 1) {
int index = currentPointer[0];
currentPointer[s] = value;
//Serial.println(index);
digitalWrite(lightPin[index], (value > 0) ? HIGH : LOW);
// analogWrite( lightPin[currentPointer[0]], currentPointer[1]); // implement later
if (feedback) {
Serial.print("light: ");
Serial.println(value);
}
//servos
} else {
int index = currentPointer[0];
if (feedback) {
Serial.print("servo ");
Serial.print(index * 2 + s - 2);
Serial.print(": ");
Serial.println(value);
}
uint16_t pulselen = map(value, 0, 180, SERVOMIN[index], SERVOMAX[index]);
currentPointer[s] = pulselen;
pwm[0].setPWM(index * 2 + (s - 2), 0, pulselen); //current pointer id * 2 + s (s is 2 or 3)
//delay(20);
}
}
// this was plan B - not using
void executePointer() {
int index = currentPointer[0];
analogWrite( lightPin[index], currentPointer[1]);
pwm[0].setPWM(index * 2, 0, currentPointer[2]);
pwm[0].setPWM(index * 2 + 1, 0, currentPointer[3]);
delay(20);
}
When I run a piece of code that only gathers values from the temp sensor it returns the correct values.
when I integrate this functionality into a larger piece of code it constantly returns -127 degrees.
#include <OneWire.h>
#include <DallasTemperature.h>
#include <SPP.h>
#include <LiquidCrystal.h>
#define ONE_WIRE_BUS 9
OneWire oneWire(ONE_WIRE_BUS);
DallasTemperature TempSensor(&oneWire);
USB Usb; // create usb
BTD Btd(&Usb); // create bluetooth dongle instance
SPP SerialBT(&Btd, "Arduino", "0000"); // set device name and pin
LiquidCrystal lcd(7, 6, 5, 4, 3, 2); // create lcd instance using declared pins
int LightPin = A0; // pin connected to light sensor
int LcdType = 0; // variable for lcd display
int state; // variable for storing incoming data
int LDRvalue = 0; // value from light sensor
int totalLdr = 0;
int totalLdrNums = 0;
String output = ""; // output string for light sensor
String output2 = ""; // output string for temp sensor
int tempvalue = 0; // value from temp sensor
int totalTemp = 0;
int totalTempNums = 0;
float celsius = 0; // temp in celsius
void setup() {
Serial.begin(9600); // Begin serial comms at speed 9600
if (Usb.Init() == -1) { // if usb hasn't been initilsed
while(1); //wait
}
lcd.begin(16, 2); // set up lcd with 16 coloums and 2 rows
pinMode(LightPin, INPUT); // declare light pin as input
printStart(); // run printStart method
LcdType = 1; // set lcd display type to 1
TempSensor.begin();
}
void loop() {
Usb.Task(); // polls connected devices for status
if(SerialBT.connected) { // if BT connected
if(SerialBT.available() > 0){ // and BT is available
state = SerialBT.read() - '0'; // read incoming value and turn into regular int (0 - 9 in ascii is 48 - 57)
if(state == 0){ // if value read is zero
checkLightValue(); // run checkLightValue method
SerialBT.write(output[0]); // send first value in string
delay(50); // delay before sending next value
SerialBT.write(output[1]); // send second value
delay(50); // delay before sending next value
SerialBT.write(output[2]); // send third value
}
if(state == 1){ // if value read is 1
checkTempValue();
SerialBT.write(output2[0]); // send first value
delay(50); // delay before sending next value
SerialBT.write(output2[1]); // send second value
delay(50); // delay before sending next value
SerialBT.write(output2[3]); // send third value
delay(50); // delay before sending next value
SerialBT.write(output2[5]); // send fourth value
delay(50); // delay before sending next value
}
if(state == 2){
//Restart();
SerialBT.disconnect();
}
if(state == 3){
LcdType = 1;
}
if(state == 4){
LcdType = 2;
}
if(state == 5){
LcdType = 3;
}
if(LcdType == 1){ // if lcd type variable = 1
printLcd();} // run printLcd method
if (LcdType == 2){
printLcd2();
}
if(LcdType == 3){
printLcd3();
}
}
}
}
//void (*resetFunc)(void) = 0;
void checkLightValue(){
output = ""; // reset output string to nothing
LDRvalue = analogRead(LightPin); // read in light value
totalLdr = totalLdr + LDRvalue;
totalLdrNums = totalLdrNums + 1;
int LDR1 = LDRvalue / 100; // get int 1 from value
int twod = LDRvalue - (LDR1 * 100); // get int 2 and 3 from value
int LDR2 = twod / 10; // get int 2 from value
int LDR3 = twod - (LDR2 * 10); // get int 3 from value
output += LDR1; //
output += LDR2; //
output += LDR3; // appends values to string
}
void checkTempValue(){
output2 = ""; // reset output string to nothing
TempSensor.requestTemperatures();
Serial.println(TempSensor.getTempCByIndex(0));
celsius = TempSensor.getTempCByIndex(0);
totalTemp = totalTemp + celsius;
totalTempNums = totalTempNums + 1;
int c1 = celsius / 100; // get first int from value
int twod = celsius - (c1 * 100); //
int c2 = twod / 10;
int c3 = twod - (c2 *10);
output2 += c1; //
output2 += c2; //
output2 += c3; // add values to string to send
}
void printLcd(){
lcd.clear(); // clear lcd
lcd.print("LDR : "); lcd.print(LDRvalue); // display current ldr value
lcd.setCursor(0,1); // set cursor to second row
lcd.print("Temp : "); lcd.print(celsius); // display current temp value on row 2
}
void printLcd2(){
int Averagevalue = totalLdr / totalLdrNums;
lcd.clear();
lcd.print("Average light :");
lcd.setCursor(0,1);
lcd.print(Averagevalue);
}
void printLcd3(){
int Averagevalue = totalTemp / totalTempNums;
lcd.clear();
lcd.print("Average temp :");
lcd.setCursor(0,1);
lcd.print(Averagevalue);
}
void printStart(){
lcd.clear(); // clear lcd
lcd.setCursor(1,1); // set cursor on second row
lcd.print("Waiting for a Connection ?"); // print message
for(int x=1; x<16; x++) { // do following 15 times
lcd.setCursor(x,0); // set cursor to first row
lcd.print("Arduino Started"); // print message // doing this as lcd scrolls means the top line (message) appears static while the bottom line (message) scrolls
lcd.scrollDisplayLeft(); // scroll display left
delay(250); // delay before moving again
}
}
I am trying to write my arduino code to upon detection of a change in the potentiometer analog read value to execute a function.
My question is how do I detect a change in the potentiometer value, I am reading in the potentiometer as normally done, but I am stuck as to how to compare this to see if it has changed.
My loop code for reading potentiometer value:
void loop()
{
val = analogRead(potpin);
val = map(val, 0, 1023, 0, 179);
Serial.println(val);
delay(15);
if (val >= 90)
{
sendSMS5();
delay(10000);
switchOff();
}
}
I am thinking that maybe a number of IF statments to compare if the value falls into a certain bracket is the only way to do this.
Save the value in a variable declared outside the loop.
#define TOLERANCE 10
int oldVal = 0;
void loop()
{
val = analogRead(potpin);
val = map(val, 0, 1023, 0, 179);
Serial.println(val);
delay(15);
int diff = abs(val - oldVal);
if(diff > TOLERANCE)
{
oldVal = val; // only save if the val has changed enough to avoid slowly drifting
// and so on
}
if (val >= 90)
{
sendSMS5();
delay(10000);
switchOff();
}
}