Seeed_Python_SI114X

Grove - Sunlight Sensor (si114x) is a multi-channel digital light sensor, which has the ability to detect UV-light, visible light and infrared light.

This device is based on SI1145, a new sensor from SiLabs. The Si1145 is a low-power, reflectance-based, infrared proximity, UV index and ambient light sensor with I2C digital interface and programmable-event interrupt output. This device offers excellent performance under a wide dynamic range and a variety of light sources including direct sunlight.

Dependencies

This driver depends on:

• grove.py

This is easy to install with the following command.

pip3 install Seeed-grove.py

Installing from PyPI

On supported GNU/Linux systems like the Raspberry Pi, you can install the driver locally from PyPI. To install for current user:

pip3 install seeed-python-si114x

To install system-wide (this may be required in some cases):

sudo pip3 install seeed-python-si114x

if you want to update the driver locally from PyPI. you can use:

pip3 install --upgrade seeed-python-si114x

Usage Notes

First, Check the corresponding i2c number of the board:

(.env) pi@raspberrypi:~ $ ls /dev/i2c*
/dev/i2c-1

Check if the i2c device works properly， 0x60 is the SI114x i2c address.

pi@raspberrypi:~/Seeed_Python_SI114X $ i2cdetect -y -r 1
     0  1  2  3  4  5  6  7  8  9  a  b  c  d  e  f
00:          -- 04 -- -- -- -- -- -- -- -- -- -- -- 
10: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
20: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
30: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
40: -- -- -- -- -- -- -- -- UU -- -- -- -- -- -- -- 
50: -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
60: 60 -- -- -- -- -- -- -- -- -- -- -- -- -- -- -- 
70: -- -- -- -- -- -- -- --   

Usage

import seeed_si114x
import time
import signal
def handler(signalnum, handler):
    print("Please use Ctrl C to quit")
def main():
    SI1145 = seeed_si114x.grove_si114x()
    print("Please use Ctrl C to quit")
    signal.signal(signal.SIGTSTP, handler) # Ctrl-z
    signal.signal(signal.SIGQUIT, handler) # Ctrl-\
    while True:
        print('Visible %03d UV %.2f IR %03d' % (SI1145.ReadVisible , SI1145.ReadUV/100 , SI1145.ReadIR),end=" ")
        print('\r', end='')
        time.sleep(0.5)
if __name__  == '__main__':
    main()

API Reference

• uint16_t ReadVisible(void): return visible light of Ambient.

    print("Visible %03d" % SI1145.ReadVisible)

• uint16_t ReadUV(void): return Ultraviolet (UV) Index.

    print("UV %.2f" % SI1145.ReadUV / 100)

• uint16_t ReadIR(void): return infrared light of Ambient.

    print("IR %03d" % SI1145.ReadIR)

---

This software is written by seeed studio
and is licensed under The MIT License. Check License.txt for more information.

Contributing to this software is warmly welcomed. You can do this basically by
forking, committing modifications and then pulling requests (follow the links above
for operating guide). Adding change log and your contact into file header is encouraged.
Thanks for your contribution.

Seeed Studio is an open hardware facilitation company based in Shenzhen, China.
Benefiting from local manufacture power and convenient global logistic system,
we integrate resources to serve new era of innovation. Seeed also works with
global distributors and partners to push open hardware movement.