I have been using the GPS module on waspmotes, and I have been able to get data off it. However on a fine day, with clear visible skies(which I don't think matters), I cannot be able to set the power mode on.
On calling GPS.setMode(GPS_ON), it fails to set the power mode on, and on freezes on subsequent call to: gpsConnected = GPS.check();
I have tried changing the GPS unit to no avail. I am using the following code. (NB: I have removed the unnecessary bits of code for the sake of brevity)
void setup()
{
ACC.ON();
USB.begin(); // Opening UART to show messages using 'Serial Monitor'
//Initialize the GPS module
GPS.ON(); // Turn GPS on
GPS.setMode(GPS_ON); // set GPS on
if(!GPS.pwrMode) USB.println("Was unable to set on the GPS internal power mode."); //this message gets printed.
if(!GPS.setCommMode(GPS_NMEA_GGA)) USB.println("Was unable to set the GPS communication mode.");
// Power up the Real Time Clock(RTC), init I2C bus and read initial values
RTC.ON();
........
}
void loop(){
//declare the variables
len, i, j = 0;
char degree[4] = "", minutes[8] = "", *latitude, *longitude, *altitude;
uint8_t temperature = 0;
int8_t fileFound = 0;
double latitude_dd, longitude_dd;
byte accOk;
//check if the GPS has connected to the satellite
GPS.begin(); // open the uart
GPS.init(); // Inits the GPS module
gpsConnected = GPS.check();
........
........
}
What might have happened???
Any help will be appreciated.
This was caused by using the RTC.setTime function. In the code, as can be seen here: http://pastebin.com/RmA98MkD, on line 195, RTC.setTimeFromGPS(), I was setting the boards time with the time that I received from GPS. This ended up screwing the GPS connection up and the code only looped once. You can see detailed conversations from here: http://www.libelium.com/forum/viewtopic.php?f=16&t=9861
You Need to simple test. First you ensure that you are giving TTl input to the Tx and rx pin . If you upload this program It will gives GPS output string.If you are using GPS module with Serial output of RS 232 out, As you said it wont work.IT expecting TTl input only
void setup()
{
Serial.begin();
}
void loop()
{
}
Related
I am having the same problem as described in this post on the Arduino forums. I have a slight deviation in that I am using an Arduino Leonardo, but otherwise the core problem is the same.
Trying to upload a sketch to my board results in Windows stating my 'USB device has malfunctioned and Windows does not recognize it'. The COM port used for the board then disappears, as with the post above.
I tried the solution posted by Louis Davis in the linked post, which allowed me to successfully reset the board and upload a known good sketch. When this is completed, the board is able to be recognised by Windows again, and the COM port reappears; the board can be used without issue.
I have two Leonardos and I have confirmed by replicating steps across both that it is my specific code which is causing the Windows error to appear, not down to a hardware issue.
Could anyone offer pointers on what in the below code is causing this? (Code is fully commented to describe purpose/methods used)
//Code including basic setup/loop and a function I created, asking for readings to be taken from 3 sensors
//when called, and to then assign the results to global variables
//The loop function should then print the global variables in question and wait for a while before repeating
//the process
#include <Wire.h> //using an I2C breakout (accelerometer)
#include "SparkFun_MMA8452Q.h" //accelerometer breakout's library
MMA8452Q accel; //create an instance of this accelerometer
int FSR_pin = A1; //force resistor pin
const int PHOTO_pin = A0; //phototransistor pin
//declare variables to use to take a base reading, to later measure against for changes
int base_PHOTO = 0;
int base_FSR = 0;
byte base_ORIEN = 0; //using the method recommended in the accelerometer's startup page to get orientation
//readings, which they say is passed back as a byte; section 'Reading Portrait/Landscape'
//on this page https://learn.sparkfun.com/tutorials/mma8452q-accelerometer-breakout-hookup-guide
void setup() {
// put your setup code here, to run once:
Serial.begin(9600);
Wire.begin();
}
void baseReading() {
base_FSR = analogRead(FSR_pin);
base_PHOTO = analogRead(PHOTO_pin);
base_ORIEN = accel.readPL();
}
void loop() {
// put your main code here, to run repeatedly:
baseReading(); //call my own function to get base readings
Serial.println(base_FSR);
Serial.println(base_PHOTO);
Serial.println(base_ORIEN);
delay(5000);
}
int takeReading() {
}
I have taken readings from each sensor individually using test sketches from the component manufacturers; the problem only appeared when I tried to combine them into one bit of code. Here's a hyperlink to the accelerometer breakout guide referenced in the above code.
Solved: The code was missing the line accel.init(); from the setup function.
I first ruled out the FSR & phototransistor I was using, as running code for only these components performed as expected. That left the MMA8452Q's code to look at.
I'd been using the manufacturer's guide as linked above for the accelerometer, and Example #3 (orientation reading) from its library to write my code out; I managed to drop the init and assumed the problem was with the new .readPL method I had put in.
The example code uses .begin instead of .init, and also uses this as part of a print statement, so I didn't immediately catch on that the purpose of its inclusion was the same.
The fixed code is as follows:
//Code including basic setup/loop and a function I created, asking for readings to be taken from 3 sensors when called and assigned to global variables
//The loop function should then print the global variables in question and wait for a while before repeating the process
#include <Wire.h>
#include "SparkFun_MMA8452Q.h"
MMA8452Q accel;
int FSR_pin = A1;
const int PHOTO_pin = A0;
//variables to use to take a base reading, to later measure against for changes
int base_PHOTO = 0;
int base_FSR = 0;
byte base_ORIEN = 0;
void setup() {
Serial.begin(9600);
Wire.begin();
accel.init(); //The new line, which allows this to run as intended
}
void baseReading() {
base_FSR = analogRead(FSR_pin);
base_PHOTO = analogRead(PHOTO_pin);
base_ORIEN = accel.readPL();
}
void loop() {
baseReading();
Serial.println(base_FSR);
Serial.println(base_PHOTO);
Serial.println(base_ORIEN);
delay(5000);
}
I try original O-Scope project (PigOScope) without touchscreen based on STM32F103C8T6 Bluepill board, but got some problem:
I used newest rogerclarkmelbourne/Arduino_STM32 Core and downloaded
pingumacpenguin/STM32-O-Scope sketch. I compiled and uploaded it to the device via UART from 0x08000000 address. Then I started the device. The grid and coordinate lines were displayed on the screen. Also on the screen were displayed inscriptions below 0.0 uS/Sample etc... But any noise or pulse signal from PB1 on my Probe. Why the chart is not drawn?
Also I tried to log my steps in Usart in DMA activation code function:
void takeSamples()
{
// This loop uses dual interleaved mode to get the best performance out of
the ADCs
Serial.println("Init DMA");
dma_init(DMA1);
dma_attach_interrupt(DMA1, DMA_CH1, DMA1_CH1_Event);
Serial.println("Enable DMA for ADC");
adc_dma_enable(ADC1);
dma_setup_transfer(DMA1, DMA_CH1, &ADC1->regs->DR, DMA_SIZE_32BITS,
dataPoints32, DMA_SIZE_32BITS, (DMA_MINC_MODE |
DMA_TRNS_CMPLT));// Receive buffer
Serial.println("Set DMA transfer");
Serial.println(maxSamples / 2);
dma_set_num_transfers(DMA1, DMA_CH1, maxSamples / 2);
dma1_ch1_Active = 1;
Serial.println("Enable the channel and start the transfer");
dma_enable(DMA1, DMA_CH1); // Enable the channel and start the transfer.
samplingTime = micros();
Serial.println(samplingTime);
while (dma1_ch1_Active); // SOME BUG OR WHAT.... PROGRAM STOP HERE!!!
samplingTime = (micros() - samplingTime);
Serial.println("Disable DMA");
dma_disable(DMA1, DMA_CH1); //End of trasfer, disable DMA and Continuous
mode.
}
Event handler for stop interrupt
static void DMA1_CH1_Event()
{
dma1_ch1_Active = 0;
}
Volatile flag to stop routine
volatile static bool dma1_ch1_Active = 0;
Program keep crushing on while loop i think... And program does't work beyond takeSamples() function.
Why program does't exit the loop?
I have been trying to store data (real time, gas sensor data) into a .txt file so as to make graphs.
This is my arduino code:
const int gasPin = A0; //Gas sensor output pin to Arduino analog A0 pin
void setup()
{
Serial.begin(9600); //Initialize serial port - 9600 bps
}
void loop()
{
Serial.println(analogRead(gasPin));
delay(1000); // Print value every 1 sec.
}
And this is my Processing code:
import processing.serial.*;
Serial mySerial;
PrintWriter output;
void setup() {
mySerial = new Serial(this, "COM3", 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();
output.close();
exit();
}
This doesn't work. I always get an empty data.txt file.
You should get into the habit of breaking your problem down into smaller steps and then taking those steps on one at a time.
For example, can you create a simple example sketch that stores a value in a file? Don't worry about Arduino yet. Just store a single value in a file.
Then make it so you store a bunch of values in the file. Maybe the value returned from millis(), or the mouse position. Again, don't worry about Arduino yet. Get this working perfectly before moving on.
Separately from that, can you make an Arduino program that sends values to a Processing sketch that simply prints those values to the console?
When you have those working separately, then you can combine them into a single program.
Right now, there's no way to know which part of your code is failing: is it the Arduino code? Is it the file storage? So you need to isolate those pieces so we (you) can test them by themselves.
If you still can't figure it out, then post a MCVE of just a single step in a new question post, and we'll go from there. Good luck.
I am using Olimex EKG Shield with Arduino Uno.
void setup() {
// put your setup code here, to run once:
// initialize serial communication at 9600 bits per second:
Serial.begin(115200);
}
void loop() {
// put your main code here, to run repeatedly:
// read the input on analog pin 0:
int sensorValue = analogRead(A0);
// Convert the analog reading (which goes from 0 - 1023) to a voltage (0 - 5V):
float value = sensorValue * (5.0 / 1023.0);
// print out the value you read:
Serial.println(value);
}
With this code provided here, I am getting a voltage value from 0-5V.
Since its a loop, the data keep shows in the serial monitor until it is disconnected.
So, what I am trying to do is that measure ECG for a certain amount of time (let's say 5 min) or data points (let's say a million points), and then save this data into a .txt file.
//From Arduino to Processing to Txt or cvs etc.
//import
import processing.serial.*;
//declare
PrintWriter output;
Serial udSerial;
void setup() {
udSerial = new Serial(this, Serial.list()[0], 115200);
output = createWriter ("data.txt");
}
void draw() {
if (udSerial.available() > 0) {
String SenVal = udSerial.readString();
if (SenVal != null) {
output.println(SenVal);
}
}
}
void keyPressed(){
output.flush();
output.close();
exit();
}
I found this processing code that imports data from Arduino serial monitor and saves as a .txt file, but it doesn's work somehow.
I think I need to make some change to the code on Arduino side and also on Processing side.
If anyone can help with me, I would really appreciate.
Thank you.
You need to be more specific than saying "it doesn't work somehow" - we have no idea what that means. What exactly did you expect this code to do? What exactly does it do instead?
You also need to split this up into smaller problems.
Can you create a simple example program that simply sends the values to Processing? Just print them to the console for now.
Can you create a separate example program that stores values in a text file? Just use hard-coded values or random values for now- don't worry about the arduino yet.
When you have both of those working perfectly, then you can think about combining them into one program that does both: sends values from the arduino and saves those values to a text file.
You can't just "find code" and expect it to work. You have to break your problem down and then approach each individual step by itself. Then if you get stuck on a specific step, you can post a MCVE and we can go from there. Good luck.
I am fairly new to the arduino topic and try to get a few things to work together.
First i tried setting up a DC motor that can be controlled via PWM, which works perfectly when used standalone. I can start/stop the motor and change speed depending on the value i send to the PWM pin.
Second i tried to use an RF-5V wireless receiver to work with a remote control from remote switched power outlets. For this one i followed the instructions on how to build a 433mhz sniffer.
This all by itself works as well. I can receive diffent codes depending on which keys on the remote i am pressing.
Now the fun part started: I wanted to integrate both of the projects into one, so i could use the remote to start/stop the motor.
So i came up with the following circuit:
(Thanks for some of you pointing out that the circuit does not match the sketch. I made an error when drawing, but even with the cables attached to the right pins, it works as described)
and the following code (which is partly from the instructions mentioned above):
#include <RCSwitch.h>
// init 433MHz lib
RCSwitch mySwitch = RCSwitch();
unsigned long lOldValue=0; // to check for consecutive reads on 433MHz
int motorPin = 5; // PWM-Pin to use for motor
void setup()
{
pinMode(motorPin, OUTPUT);
Serial.begin(9600);
// set-up rf receiver
mySwitch.enableReceive(0); // 433MHz Receiver on interrupt 0 => that is pin #2
}
void loop()
{
if (mySwitch.available())
{
int value = mySwitch.getReceivedValue();
// only react, if at least two times same value received
if (value == lOldValue)
{
if (value == 0)
{
Serial.print("Unknown encoding");
}
else
{
Serial.print("Received ");
Serial.print( mySwitch.getReceivedValue() );
Serial.print(" / ");
Serial.print( mySwitch.getReceivedBitlength() );
Serial.print("bit ");
Serial.print("Protocol: ");
Serial.println( mySwitch.getReceivedProtocol() );
// One of the keys on the remote
if (value == 274393) {
Serial.println("got start code, starting motor");
analogWrite(motorPin, 100); // start the motor
}
// another key on the remote
if (value == 270384) {
Serial.println("got stop code, stopping motor");
analogWrite(motorPin, 0); // stop the motor
}
}
}
lOldValue = value;
mySwitch.resetAvailable();
}
}
when i run the code and click on the remote, i get different values shown depending on the key i press. So the wireless receiver works as expected.
When i receive the right value for starting the motor, the motor really begins to turn, so this works as well.
And here the fun part starts:
As soon as i use the analogWrite function to send data to the PWM port the motor is connected to, the wireless receiver stops working (or at least I do not get any more values when pressing a key on the remote).
I found a few similar posts/problem descriptions on the net which said to try the following:
Use another pin for PWM (due to possible interrupt conflicts). I tried that as well, same behaviour
Use external power supply instead of USB-Cable, which helped somebody resolve this issue. Not here. Does not work either
So the question is:
Does anybody know how to combine those two things together so a can use the wireless receiver to get commands and switch on/off the motor with it?
I have the same problem in the past. The problem is the ability of arduino to supply them both. I recommend to use external power supply for the receiver or for the motor (it's best to do that for the motor but according to your circuit it's impossible) like the 545043YwRobot and supply the other from the arduino (I hope this is not what you try already, if so i'm sorry).
Hope it's help.
Yoav