Arduino Flora with light sensor

Question

Hello all. I am VERY new at Arduino coding, and I am trying to get my Flora and Neopixels to respond using the light sensor. Something is wrong with my code, and no matter how I try to adjust it, I am still getting errors. Any help would be appreciated....

And I apologize, but I don't know how to put code tags.

The errors I am getting are the following:

(sketch file) light sensor.ino:162:5: error: use of undeclared identifier 'colorWipe'

colorWipe(strip.Color(255,250,240));

^
(sketch file) light sensor.ino:167:5: error: use of undeclared identifier 'colorWipe'

colorWipe(strip.Color(0,255,0));

^
(sketch file) light sensor.ino:172:5: error: use of undeclared identifier 'colorWipe'

colorWipe(strip.Color(255,0,0));

My code so far:

#include <Wire.h>

#include <Adafruit_Sensor.h>

#include <Adafruit_TSL2561_U.h>

#include <Adafruit_NeoPixel.h>

#define PIN 6

Adafruit_NeoPixel strip = Adafruit_NeoPixel(4, PIN, NEO_GRB + NEO_KHZ800);

/* This driver uses the Adafruit unified sensor library (Adafruit_Sensor),

which provides a common 'type' for sensor data and some helper functions.

To use this driver you will also need to download the Adafruit_Sensor

library and include it in your libraries folder.

You should also assign a unique ID to this sensor for use with

the Adafruit Sensor API so that you can identify this particular

sensor in any data logs, etc. To assign a unique ID, simply

provide an appropriate value in the constructor below (12345

is used by default in this example).

Connections

===========

Connect SCL to analog 5

Connect SDA to analog 4

Connect VDD to 3.3V DC

Connect GROUND to common ground

I2C Address

===========

The address will be different depending on whether you leave

the ADDR pin floating (addr 0x39), or tie it to ground or vcc.

The default addess is 0x39, which assumes the ADDR pin is floating

(not connected to anything). If you set the ADDR pin high

or low, use TSL2561_ADDR_HIGH (0x49) or TSL2561_ADDR_LOW

(0x29) respectively.

History

=======

2013/JAN/31 - First version (KTOWN)

*/

Adafruit_TSL2561_Unified tsl = Adafruit_TSL2561_Unified(TSL2561_ADDR_FLOAT, 12345);

/**************************************************************************/

/*

Displays some basic information on this sensor from the unified

sensor API sensor_t type (see Adafruit_Sensor for more information)

*/

/**************************************************************************/

void displaySensorDetails(void)

{

sensor_t sensor;

tsl.getSensor(&sensor);

Serial.println("------------------------------------");

Serial.print ("Sensor: "); Serial.println(sensor.name);

Serial.print ("Driver Ver: "); Serial.println(sensor.version);

Serial.print ("Unique ID: "); Serial.println(sensor.sensor_id);

Serial.print ("Max Value: "); Serial.print(sensor.max_value); Serial.println(" lux");

Serial.print ("Min Value: "); Serial.print(sensor.min_value); Serial.println(" lux");

Serial.print ("Resolution: "); Serial.print(sensor.resolution); Serial.println(" lux");

Serial.println("------------------------------------");

Serial.println("");

delay(500);

}

/**************************************************************************/

/*

Configures the gain and integration time for the TSL2561

*/

/**************************************************************************/

void configureSensor(void)

{

/* You can also manually set the gain or enable auto-gain support */

// tsl.setGain(TSL2561_GAIN_1X); /* No gain ... use in bright light to avoid sensor saturation */

// tsl.setGain(TSL2561_GAIN_16X); /* 16x gain ... use in low light to boost sensitivity */

tsl.enableAutoRange(true); /* Auto-gain ... switches automatically between 1x and 16x */

/* Changing the integration time gives you better sensor resolution (402ms = 16-bit data) */

tsl.setIntegrationTime(TSL2561_INTEGRATIONTIME_13MS); /* fast but low resolution */

// tsl.setIntegrationTime(TSL2561_INTEGRATIONTIME_101MS); /* medium resolution and speed */

// tsl.setIntegrationTime(TSL2561_INTEGRATIONTIME_402MS); /* 16-bit data but slowest conversions */

/* Update these values depending on what you've set above! */

Serial.println("------------------------------------");

Serial.print ("Gain: "); Serial.println("Auto");

Serial.print ("Timing: "); Serial.println("13 ms");

Serial.println("------------------------------------");

}

/**************************************************************************/

/*

Arduino setup function (automatically called at startup)

*/

/**************************************************************************/

void setup(void)

{

Serial.begin(9600);

Serial.println("Light Sensor Test"); Serial.println("");

/* Initialise the sensor */

if(!tsl.begin())

{

/* There was a problem detecting the ADXL345 ... check your connections */

Serial.print("Ooops, no TSL2561 detected ... Check your wiring or I2C ADDR!");

while(1);

}

/* Display some basic information on this sensor */

displaySensorDetails();

/* Setup the sensor gain and integration time */

configureSensor();

/* We're ready to go! */

Serial.println("");

// This is for Trinket 5V 16MHz, you can remove these three lines if you are not using a Trinket

#if defined (__AVR_ATtiny85__)

if (F_CPU == 16000000) clock_prescale_set(clock_div_1);

#endif

// End of trinket special code

strip.begin();

strip.show(); // Initialize all pixels to 'off'

}

/**************************************************************************/

/*

Arduino loop function, called once 'setup' is complete (your own code

should go here)

*/

/**************************************************************************/

void loop(void)

{

/* Get a new sensor event */

sensors_event_t event;

tsl.getEvent(&event);

/* Display the results (light is measured in lux) */

if (event.light)

{

Serial.print(event.light); Serial.println(" lux");

}

else

{

/* If event.light = 0 lux the sensor is probably saturated

and no reliable data could be generated! */

Serial.println("Sensor overload");

}

delay(250);

//>130 is (255, 250, 240)

if (event.light > 130)

{

colorWipe(strip.Color(255,250,240));

}

// 129-50 is (0,255,0)

else if ((event.light > 50) && (event.light < 129))

{

colorWipe(strip.Color(0,255,0));

}

// and <50 is (255, 0, 0)

else if (event.light < 50)

{

colorWipe(strip.Color(255,0,0));

}

mcb1 · Accepted Answer

Your errors are because you have a bunch of commands outside the Void loop() Your start { is at line 125 while the close } is at 144 But then you have other code at lines 147-159 which should have been inside the loop. You fixed that with the second post (you moved it to line 193) A handy trick of the new IDE's is that if you click on the bracket (start or finish), it highlights the matching one. Whether it does this in codebender or not I'm not sure. Another helpful way is indenting. While you don't need to, it makes the code much easier to follow and debug the odd missing bits. Mark

Jan Cumps · Answer

Hi, did you perform this instruction from the source code? To use this driver you will also need to download the Adafruit_Sensor
 library and include it in your libraries folder.

mcb1 · Answer

If your code is the example above, then you seem to be missing this routine. // Fill the dots one after the other with a color
void colorWipe(uint32_t c, uint8_t wait) {
 for(uint16_t i=0; i<strip.numPixels(); i++) {
 strip.setPixelColor(i, c);
 strip.show();
 delay(wait);
 }
} The error is telling you it doesn't know what to do when it gets to the colorWipe(strip.Color(255,250,240)); and the other two. I always advocate trying the examples that the supplier provides before leaping into something else. While they aren't always full of comments to help people understand, they at least prove your connections, setup etc works. Since it seems you have tried this, your cut and paste missed a few bits. One method I do is copy everything and then comment out what I think I don't need. If the compile (or running it) doesn't work, then it's very easy to simply uncomment the code. When you done what you need, then you can remove the commented sections to clean it up. Out of interest why are you using Codebender rather than downloading the IDE (which is free).? Mark

clem57 · Answer

Hi Jennifer, Unfortunately it is hard to take code from somewhere and try to debug it. My guess is you missed the correct headers. Also I see delays and procedure never invoked. Can I suggest a tutorial approach to learn and program the Neopixel. To properly code them, I would follow https://learn.adafruit.com/multi-tasking-the-arduino-part-3 . It may take a few reads, but you will understand the task of making the code work with less frustrations. Clem

mcb1 · Answer

jbarker822 Jennifer. I think you're missing the wait value. The example shows this // Some example procedures showing how to display to the pixels:
 colorWipe(strip.Color(255, 0, 0), 50); // Red
 colorWipe(strip.Color(0, 255, 0), 50); // Green
 colorWipe(strip.Color(0, 0, 255), 50); // Blue You'll note that there is two parts .... the RGB values and then the wait amount. , 50 void colorWipe(uint32_t c, uint8_t wait) shows it needs two numbers Your code is missing the important part. ... the wait value if (event.light > 130) {
 colorWipe(strip.Color(255,250,240));
} Also when posting code please paste it in, then highlight it, and select the >> and then Syntax Highlighting and choose C++. I tend to save my files locally then copy them onto a memory stick to use somewhere else. I also tend to save with either date or date and time appended to ensure I can go backwards my changes aren't working as well as I want them to. Mark

Jan Cumps · Answer

Move it before its first use. A good place would be just before setup() ?

mcb1 · Answer

BTW Others may not appreciate you marking your own answer as correct after getting help. Glad you've been able to learn some new tricks. Mark

Arduino Flora with light sensor

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