Hi guys,
First time posting, not really sure if this is supposed to go here or in I2C topic.
I got a TSL2591 lux sensor a few days ago, soldered it and tried it with Adafruit's library example sketch. But I can't get any data from it, and I'm out of ideas.
Here is a picture of the wiring set up:
Nothing fancy: sensor is alimented by the 5V output of the Arduino, the SCL is connected on the A5 pin and SDA on A4 (and GND to GND! 8) )
And here is the code I use, which is the exact same one as the library example sketch:
/* TSL2591 Digital Light Sensor */
/* Dynamic Range: 600M:1 */
/* Maximum Lux: 88K */
#include <Wire.h>
#include <Adafruit_Sensor.h>
#include "Adafruit_TSL2591.h"
// Example for demonstrating the TSL2591 library - public domain!
// connect SCL to analog 5
// connect SDA to analog 4
// connect Vin to 3.3-5V DC
// connect GROUND to common ground
Adafruit_TSL2591 tsl = Adafruit_TSL2591(2591); // pass in a number for the sensor identifier (for your use later)
/**************************************************************************/
/*
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 TSL2591
*/
/**************************************************************************/
void configureSensor(void)
{
// You can change the gain on the fly, to adapt to brighter/dimmer light situations
//tsl.setGain(TSL2591_GAIN_LOW); // 1x gain (bright light)
tsl.setGain(TSL2591_GAIN_MED); // 25x gain
// tsl.setGain(TSL2591_GAIN_HIGH); // 428x gain
// Changing the integration time gives you a longer time over which to sense light
// longer timelines are slower, but are good in very low light situtations!
tsl.setTiming(TSL2591_INTEGRATIONTIME_100MS); // shortest integration time (bright light)
// tsl.setTiming(TSL2591_INTEGRATIONTIME_200MS);
// tsl.setTiming(TSL2591_INTEGRATIONTIME_300MS);
// tsl.setTiming(TSL2591_INTEGRATIONTIME_400MS);
// tsl.setTiming(TSL2591_INTEGRATIONTIME_500MS);
// tsl.setTiming(TSL2591_INTEGRATIONTIME_600MS); // longest integration time (dim light)
/* Display the gain and integration time for reference sake */
Serial.println("------------------------------------");
Serial.print ("Gain: ");
tsl2591Gain_t gain = tsl.getGain();
switch(gain)
{
case TSL2591_GAIN_LOW:
Serial.println("1x (Low)");
break;
case TSL2591_GAIN_MED:
Serial.println("25x (Medium)");
break;
case TSL2591_GAIN_HIGH:
Serial.println("428x (High)");
break;
case TSL2591_GAIN_MAX:
Serial.println("9876x (Max)");
break;
}
Serial.print ("Timing: ");
Serial.print((tsl.getTiming() + 1) * 100, DEC);
Serial.println(" ms");
Serial.println("------------------------------------");
Serial.println("");
}
/**************************************************************************/
/*
Program entry point for the Arduino sketch
*/
/**************************************************************************/
void setup(void)
{
Serial.begin(9600);
Serial.println("Starting Adafruit TSL2591 Test!");
if (tsl.begin())
{
Serial.println("Found a TSL2591 sensor");
}
else
{
Serial.println("No sensor found ... check your wiring?");
while (1);
}
/* Display some basic information on this sensor */
displaySensorDetails();
/* Configure the sensor */
configureSensor();
// Now we're ready to get readings ... move on to loop()!
}
/**************************************************************************/
/*
Shows how to perform a basic read on visible, full spectrum or
infrared light (returns raw 16-bit ADC values)
*/
/**************************************************************************/
void simpleRead(void)
{
// Simple data read example. Just read the infrared, fullspecrtrum diode
// or 'visible' (difference between the two) channels.
// This can take 100-600 milliseconds! Uncomment whichever of the following you want to read
uint16_t x = tsl.getLuminosity(TSL2591_VISIBLE);
//uint16_t x = tsl.getLuminosity(TSL2591_FULLSPECTRUM);
//uint16_t x = tsl.getLuminosity(TSL2591_INFRARED);
Serial.print("[ "); Serial.print(millis()); Serial.print(" ms ] ");
Serial.print("Luminosity: ");
Serial.println(x, DEC);
}
/**************************************************************************/
/*
Show how to read IR and Full Spectrum at once and convert to lux
*/
/**************************************************************************/
void advancedRead(void)
{
// More advanced data read example. Read 32 bits with top 16 bits IR, bottom 16 bits full spectrum
// That way you can do whatever math and comparisons you want!
uint32_t lum = tsl.getFullLuminosity();
uint16_t ir, full;
ir = lum >> 16;
full = lum & 0xFFFF;
Serial.print("[ "); Serial.print(millis()); Serial.print(" ms ] ");
Serial.print("IR: "); Serial.print(ir); Serial.print(" ");
Serial.print("Full: "); Serial.print(full); Serial.print(" ");
Serial.print("Visible: "); Serial.print(full - ir); Serial.print(" ");
Serial.print("Lux: "); Serial.println(tsl.calculateLux(full, ir));
}
/**************************************************************************/
/*
Performs a read using the Adafruit Unified Sensor API.
*/
/**************************************************************************/
void unifiedSensorAPIRead(void)
{
/* Get a new sensor event */
sensors_event_t event;
tsl.getEvent(&event);
/* Display the results (light is measured in lux) */
Serial.print("[ "); Serial.print(event.timestamp); Serial.print(" ms ] ");
if ((event.light == 0) |
(event.light > 4294966000.0) |
(event.light <-4294966000.0))
{
/* If event.light = 0 lux the sensor is probably saturated */
/* and no reliable data could be generated! */
/* if event.light is +/- 4294967040 there was a float over/underflow */
Serial.println("Invalid data (adjust gain or timing)");
}
else
{
Serial.print(event.light); Serial.println(" lux");
}
}
/**************************************************************************/
/*
Arduino loop function, called once 'setup' is complete (your own code
should go here)
*/
/**************************************************************************/
void loop(void)
{
//simpleRead();
advancedRead();
// unifiedSensorAPIRead();
delay(500);
}
And when I try it, the serial monitor displays:
Starting Adafruit TSL2591 Test!
No sensor found ... check your wiring?
Si I spent some time testing everything and looking on the web to find the root of the problem (no success). Now, I am sure the problem does not come from:
- the wires
- the Arduino pins (I have a BMP180 that I also plug on A4/A5 with I2C protocol, and it works just fine)
- the breadboard
I have also measured voltage between the pins of the TSL2591 board: everything seems to be normal, I get around 4.5-5V between SDA and GND as well as between SCL and GND.
So I guess there are two options: either there is a problem is in the code, or the sensor is somehow not sending data (though I get some voltage on SDA).
I have not seen any problem in the code, I even took a look in the library (though I am a beginner in C++). After looking around on the web, I have not found anyone sharing or reporting a similar problem using the example sketch of the library.
As for the sensor itself, well, I really don't know how to tell if it is just dead or something? How can I be sure I just got a defective sensor?
Any help would be really appreciated!
Thanks
