TSL2561

Raspberry Pi C driver and Python Bindings for the TSL2561 sensor.

This driver is basically a port of the Adafruit TSL2561 Light Sensor Driver.

Configure I2C

Install the following packages:

• i2c-tools
• libi2c-dev
• python-dev

sudo apt-get install i2c-tools libi2c-dev python-dev

In a next step we configure i2c on the Raspberry Pi.

Add the following lines to /boot/config.txt:

#i2c
dtparam=i2c_arm=on,i2c1=on

Edit the file /etc/modules and add the following line:

i2c-dev 

Finally reboot:

sudo reboot

After the reboot you should be able to find the i2c device using the command below:

sudo i2cdetect -y 1

Building the driver

C language

Just run make.

Python language

Run sudo python setup.py build

Usage

C language

#include "tsl2561.h"
#include <stdlib.h>
#include <stdio.h>
#include <unistd.h>

int main(int argc, char **argv) {
	int address = 0x39;
	char *i2c_device = "/dev/i2c-1";

	void *tsl = tsl2561_init(address, i2c_device);
	tsl2561_enable_autogain(tsl);
	tsl2561_set_integration_time(tsl, TSL2561_INTEGRATION_TIME_13MS);
 
	if(tsl == NULL){ // check if error is present
		exit(1);
	} 
	
	int c;
	long lux;
	for(c = 0; c < 5; c++){
		lux = tsl2561_lux(tsl);
		printf("lux %lu\n", lux);
		usleep(3 * 1000 * 1000);
	}
	
	tsl2561_close(tsl);
	i2c_device = NULL;
	return 0;
}

Python language

from tentacle_pi.TSL2561 import TSL2561
import time

tsl = TSL2561(0x39,"/dev/i2c-1")
tsl.enable_autogain()
tsl.set_time(0x00)

for x in range(0,5):
	print "lux %s" % tsl.lux()
	time.sleep(3)

License

Adafruit_TSL2561, a C++ library, is licensed under BSD as specified here; the derivative work tsl2561 is provided under the MIT licence.