Dawn Robotics Forum

I have noticed that the i2c-tools and smsbus (for python) are not present in the image sent with the PI camera Robot Kit.
I want to interface the light sensor I have already connected. I have created a python file, but smsbus module is not found.
Now, considering that the robot creates its own access point, before I damage something: is there a quick and safe way to connect the raspberry to internet (my home access point) so to install tools and module?

maybe connecting it to wired internet?

thx

Hi there,

Welcome to the forums.

Not sure if you've tried this yet, but yes you're correct that you should just need to connect the Raspberry Pi to a router with an ethernet cable. Then the eth0 network interface should come up automatically and you should have internet access.

It is also possible to modify /etc/network/interfaces to connect to a WiFi network, but the access point setup may interfere a bit here, so probbly best to try a wired connection first if possible.

Regards

Alan

Hi to everybody,

i have been able to make it work, so i wold like to share with you all the process:
step 1 connect the robot to internet:
- take off the wifi dongle
- just connect to your router with a cable

step 2 install i2c tools and smbus
- to enable i2c follow this link: http://skpang.co.uk/blog/archives/575

step 3 check the i2c address of your device
- run sudo i2cdetect -y 1

I have the light sensor at address 0x28

then run a simple program, if you have the light sensor run mine below (just starting to program in python:
______________________________________
#!/usr/bin/python3

import time
import smbus

from smbus import SMBus

address = 0x29
control_on = 0x03
control_off = 0x00

TSL2561 = SMBus(1)

def enable ():
print "power ON"
TSL2561.write_byte(address, 0x80)
TSL2561.write_byte(address, control_on)
return

def disable():
print "power OFF"
TSL2561.write_byte(address, 0x80)
TSL2561.write_byte(address, control_off)
return

def Light():
var = [0,0,0,0]
var = TSL2561.read_i2c_block_data(0x29, 0x8C)
Channel0 = ((var[1]<<8) + var[0])
Channel1 = ((var[3]<<8) + var[2])
print "TOTAL LIGHT:%5d IR LIGHT:%5d" %(Channel0, Channel1)
return


def main():
enable()
while(True):
Light()
time.sleep(3)

if __name__=="__main__":
main()

_________________________________________
have fun...

big hugs from Italy


Beppe