Raspberry Pi Forums

keithellis

It is possible to complete a NOOBS headless install, however a couple of files needs to be edited before booting the Pi up for the first time.

I have produced a video highlighting how to do this. Take a look
http://bit.ly/NOOBS-headless
Keith.

keithellis

One way of doing this is by using a USB serial console cable. The console cable connects to the USB port of your computer and to the GPIO serial pins on the Raspberry Pi. This can also be used to power the Pi so no need to plug a power lead into the Pi USB port, though it is very easy to connect up ...

keithellis

The 22uF cap did the trick, getting a steady 5v output now. Thanks everyone.
Keith.

keithellis

That is an answer, but the model A is much better when running off batteries for robot or remote projects. It is also cheaper.

keithellis

I have several Rpis that I run headless. All I do when starting with a new Rpi is to boot with the ethernet connected, login via ssh, drop in my interfaces file and reboot. Poof - it is up and running. No config for supplicant needed. But what do you do if you have a model A without Ethernet port. ...

keithellis

I've just added another tutorial, this one is the first part of two and explains how to setup SSH or Secure Shell as it is also know. video can be found here http://bit.ly/SSH-part1

keithellis

You can read an output from another script using RPi.GPIO. Just GPIO.setup() it as an output in your second script and read it using GPIO.input() Also don't do a GPIO.cleanup() at the end of your script and do a GPIO.setwarnings(False) at the start. You can use GPIO.setwarnings(False), but you shou...

keithellis

You can read an output from another script using RPi.GPIO. Just GPIO.setup() it as an output in your second script and read it using GPIO.input() Also don't do a GPIO.cleanup() at the end of your script and do a GPIO.setwarnings(False) at the start. You can use GPIO.setwarnings(False), but you shou...

keithellis

We need to see the indentation, click the code button in the edit bar during composing a post and past your code in-between the code tags. GPIO.cleanup() should be at the end of your code block. It is possible that the input wired up to the switch is not pulled high or low and could therefore be flo...

keithellis

Ok, I'll get the capacitor on order and try again, thanks guys.

keithellis

If the regulator output is higher than expected then the ground wire to pin 2 is broken or has bad contact to breadboard. Richard S. Just checked, I'm getting 0.1ohm between negative battery terminal and a jumper plugged into bread board on same track as negative pin of regulator, and I am getting ...

keithellis

I believe so, I have checked and double checked.

EDIT:
Only think I have not done is connect the 22uF capacitor. Will this make a difference?

keithellis

Hello, I have a robot project ongoing, I would like to power my Pi from the onboard battery pack (6 x 1.5v AA cells) 9v supply. I have bought a Texas Instruments 5v regulator part No. LM2940CT-5.0 from CPC, http://cpc.farnell.com/jsp/search/productdetail.jsp?SKU=SC08320 Data Sheet here http://www.jo...

keithellis

Ok, not sure if this is possible, but it could be. Using a USB to serial UART converter the 3G USB dongle could be wired up to the UART pins on the Pi The converter can be powered from the Pi via a transistor controlled by a GPIO pin. The converter could therefore be powered down in code. Just an id...

keithellis

Hello, Further to Carrie Anne's post here http://www.raspberrypi.org/archives/6359#comments I thought I should post here point to my YouTube channel. I cam currently building a Raspberry Pi robot based on the magician chassis and as I encounter challenges, I and producing video tutorials showing how...

keithellis

Hello, I'm going to buy my first Raspberry Pi and I have some questions. Beore reading just remember that I would need to do everything (including installing the OS) without a monitor and a keyboard , the only thing I can use is my laptop. I will not have a monitor for it, so I don't need a distro ...

keithellis

You might want to remove the pull up resister on the Arduino board on the SCL and SDA lines. These will pull the voltage up to 5v (not good for the Pi) The Pi has pull up on the SCL and SDA lines up to 3v3 which the Arduino board will work with just fine.

Keith.

keithellis

What does your Arduino sketch look like?

keithellis

Ok, sorted this now, I have used a global variable which is set 'True' when robot is moving forward (i.e. I do not want robot to detect obstacle when it is not moving forwards). If True and object detected then reverse. All working as intended now. Thank you all. @paddyg The reason I call stop() in ...

keithellis

Or my preferred option is to get. USB serial console cable.

http://bit.ly/headless_install

Keith.

keithellis

I fixed my problem, almost I removed the drive_motor() from the while loop. the drive_motor() should only be called once and the wheels will continue to turn until stopped. Thus def object_detect(channel): avoid_object() def avoid_object(): drive_motor(80, ['leftMotorPin2']) while GPIO.input(17) == ...

keithellis

Thanks, I've give that a go. I did start thinking along those lines, hence the

Code: Select all

avoid = False

variable I had declared, but not used.

Keith.

keithellis

In addition you have missed a 'd' off speedL on the second line listed below. def set_motors(self, speedL, left_dir, speedR, right_dir): self.speedLeft.ChangeDutyCycle(speeL) GPIO.output(LEFT_DIR_PIN, left_dir) self.speedRight.ChangeDutyCycle(speedR) GPIO.output(RIGHT_DIR_PIN, right_dir)

keithellis

You setup PWM on LEFT_GO_PIN twice

Code: Select all

       self.speedLeft = GPIO.PWM(LEFT_GO_PIN, 100)
       self.speedRight = GPIO.PWM(LEFT_GO_PIN, 100)

Maybe this is causing you problems

keithellis

Hello, I've got some code to control a two wheeled robot. I am trying to add a threaded callback which detects proximity, if triggered the robot will stop and turn until the proximity detector is clear again. The stop function is called fine, but the rotation of the robot is jumpy. I've had a multi ...

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