Hello, I did a little program with my arduino uno and a BMP180 pressure captor. It was working well but since yesterday, I doesn't work and i did changed nothing.
When I open the monitor, it's only write "reboot". I'v read that i have to press the button on the arduino but it doesn't work and the monitor say reboot and reboot and reboot.
Does somebody have an answer? Thank you in advance.
PS:(sorry for my bad English)
There is no error in the program, it only write this:
The sketch uses 9314 bytes (28%) of the program storage space. The maximum is 32256 bytes.
Global variables use 845 bytes (41%) of dynamic memory, leaving 1203 bytes for local variables. The maximum is 2048 bytes.
There is no error in the program
We have to take your word for that as you did not post your sketch
Please follow the advice on posting code in Read this before posting a programming question
In particular note the advice to Auto format code in the IDE and using code tags when posting code here
well I have checked my sketch by Arduino and it was working and the next day not but i can assure you that I didn't changed it.
It's even not mine I copied it in another place.
But if it was a problem about the sketch, it would told me but it says ok it's fine and then when i open the monitor reboot. And when I reboot it doesn't work.
i can assure you that I didn't changed it.
So what have you changed ?
When I open the monitor, it's only write "reboot".
Where is this message coming from ? Maybe from the sketch, but as you have not posted it we don't know do we ?
(deleted)
So here is the code:
#include <SFE_BMP180.h>
#include <Wire.h>
// You will need to create an SFE_BMP180 object, here called "pressure":
SFE_BMP180 pressure;
#define ALTITUDE 452.0 // Altitude of SparkFun's HQ in Boulder, CO. in meters
void setup()
{
Serial.begin(9600);
Serial.println("REBOOT");
// Initialize the sensor (it is important to get calibration values stored on the device).
if (pressure.begin())
Serial.println("BMP180 init success");
else
{
// Oops, something went wrong, this is usually a connection problem,
// see the comments at the top of this sketch for the proper connections.
Serial.println("BMP180 init fail\n\n");
while(1); // Pause forever.
}
}
void loop()
{
char status;
double T,P,p0,a;
// Loop here getting pressure readings every 10 seconds.
// If you want sea-level-compensated pressure, as used in weather reports,
// you will need to know the altitude at which your measurements are taken.
// We're using a constant called ALTITUDE in this sketch:
Serial.println();
Serial.print("provided altitude: ");
Serial.print(ALTITUDE,0);
Serial.print(" meters, ");
Serial.print(ALTITUDE*3.28084,0);
Serial.println(" feet");
// If you want to measure altitude, and not pressure, you will instead need
// to provide a known baseline pressure. This is shown at the end of the sketch.
// You must first get a temperature measurement to perform a pressure reading.
// Start a temperature measurement:
// If request is successful, the number of ms to wait is returned.
// If request is unsuccessful, 0 is returned.
status = pressure.startTemperature();
if (status != 0)
{
// Wait for the measurement to complete:
delay(status);
// Retrieve the completed temperature measurement:
// Note that the measurement is stored in the variable T.
// Function returns 1 if successful, 0 if failure.
status = pressure.getTemperature(T);
if (status != 0)
{
// Print out the measurement:
Serial.print("temperature: ");
Serial.print(T,2);
Serial.print(" deg C, ");
Serial.print((9.0/5.0)*T+32.0,2);
Serial.println(" deg F");
// Start a pressure measurement:
// The parameter is the oversampling setting, from 0 to 3 (highest res, longest wait).
// If request is successful, the number of ms to wait is returned.
// If request is unsuccessful, 0 is returned.
status = pressure.startPressure(3);
if (status != 0)
{
// Wait for the measurement to complete:
delay(status);
// Retrieve the completed pressure measurement:
// Note that the measurement is stored in the variable P.
// Note also that the function requires the previous temperature measurement (T).
// (If temperature is stable, you can do one temperature measurement for a number of
// pressure measurements.)
// Function returns 1 if successful, 0 if failure.
status = pressure.getPressure(P,T);
if (status != 0)
{
// Print out the measurement:
Serial.print("absolute pressure: ");
Serial.print(P,2);
Serial.print(" mb, ");
Serial.print(P0.0295333727,2);
Serial.println(" inHg");
// The pressure sensor returns abolute pressure, which varies with altitude.
// To remove the effects of altitude, use the sealevel function and your current
// altitude.
// This number is commonly used in weather reports.
// Parameters: P = absolute pressure in mb, ALTITUDE = current altitude in m.
// Result: p0 = sea-level compensated pressure in mb
p0 = pressure.sealevel(P,ALTITUDE); // we're at 1655 meters (Boulder, CO)
Serial.print("relative (sea-level) pressure: ");
Serial.print(p0,2);
Serial.print(" mb, ");
Serial.print(p00.0295333727,2);
Serial.println(" inHg");
// On the other hand, if you want to determine your altitude from the pressure reading,
// use the altitude function along with a baseline pressure (sea-level or other).
// Parameters: P = absolute pressure in mb, p0 = baseline pressure in mb.
// Result: a = altitude in m.
a = pressure.altitude(P,p0);
Serial.print("computed altitude: ");
Serial.print(a,0);
Serial.print(" meters, ");
Serial.print(a*3.28084,0);
Serial.println(" feet");
}
else Serial.println("error retrieving pressure measurement\n");
}
else Serial.println("error starting pressure measurement\n");
}
else Serial.println("error retrieving temperature measurement\n");
}
else Serial.println("error starting temperature measurement\n");
delay(5000); // Pause for 5 seconds.
}
About the wiring, i'm using the cable that come with the arduino starter kit, and i just connect it to my computer.
Do you ever see the "BMP180 init success" or "BMP180 init fail" messages ?
How is the sensor wired to the Arduino ?
Please follow the advice on posting code in Read this before posting a programming question
In particular note the advice to Auto format code in the IDE and using code tags when posting code here
No it only write "REBOOT" in the monitor.
I did the same connections that in this video:
I have verified the port (COM3), and it's ok. Another time it was working, i didn't changed the code or the connections and now i get nothing.
Hi,
Welcome to the forum.
Please read the post at the start of any forum , entitled "How to use this Forum".
OR
http://forum.arduino.cc/index.php/topic,148850.0.html.
Then look down to item #7 about how to post your code.
It will be formatted in a scrolling window that makes it easier to read.
Can you please post a copy of your circuit, in CAD or a picture of a hand drawn circuit in jpg, png?
Thanks.. Tom... 