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by nroff-man
Fri Mar 04, 2016 1:39 am
Forum: Troubleshooting
Topic: RPi 3 - Very poor wifi performance
Replies: 77
Views: 106080

Re: RPi 3 - Very poor wifi performance

Hi

For the record, as per the other threads, disabling power
management solves the connection issues for me.

You can add something like this in your interfaces file:

Code: Select all

 pre-up iw dev $IFACE set power_save off
 post-down iw dev $IFACE set power_save on
Good luck
by nroff-man
Wed Mar 02, 2016 7:58 pm
Forum: Troubleshooting
Topic: RPi 3 - Very poor wifi performance
Replies: 77
Views: 106080

Re: RPi 3 - Very poor wifi performance

Hi :-)

Sorry for the omission of the relevant info, my desktop kernel is

Linux beethoven 4.3.0-0.bpo.1-amd64 #1 SMP Debian 4.3.3-7~bpo8+1 (2016-01-19) x86_64 GNU/Linux

Bye.
by nroff-man
Wed Mar 02, 2016 7:39 pm
Forum: Troubleshooting
Topic: RPi 3 - Very poor wifi performance
Replies: 77
Views: 106080

Re: RPi 3 - Very poor wifi performance

Hi there. In my own tests the Pi3 is unusable when connecting the an Atheros based router but is passable when connecting to a Broadcom based router :-) As for the channel availability, only channels 1-11 are available on the Pi3. I also have a Broadcom usb hub Wifi widget and strangely enough chann...
by nroff-man
Mon Dec 29, 2014 9:57 pm
Forum: Automation, sensing and robotics
Topic: LinuxCNC
Replies: 1021
Views: 288100

Re: LinuxCNC

hi If you don't have a pic32 programmer you can follow the instructions here to program the board using RPi. A few months back I finished PIC32 support in my ICSP PIC programming app which supports RPi GPIO. You may consider testing this because I think it will be simpler, uses less connections (ICS...
by nroff-man
Sun Dec 29, 2013 6:20 pm
Forum: Raspbian
Topic: udev wrong group
Replies: 13
Views: 2862

Re: udev wrong group

Hi

This is what I use for a cp2102 device, adjust for your own adapter and
post your solution if it works for you.

Code: Select all

KERNEL=="ttyUSB*", ATTRS{idVendor}=="10c4", ATTRS{idProduct}=="ea60", GROUP="dialout", MODE="0660", RUN+="/bin/ln -sf %k /dev/cygnal"
good luck.
by nroff-man
Sat Dec 28, 2013 3:53 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Introducing the Bus Parrot Bus Pirate :-)
Replies: 0
Views: 1559

Introducing the Bus Parrot Bus Pirate :-)

Hi Using the application introduced some time ago in this thread http://www.raspberrypi.org/phpBB3/viewtopic.php?f=45&t=22370 I am demonstrating how we may create a Bus Pirate clone on breadboard directly connected to the R-PI. There are plenty of applications for the Bus Pirate demonstrated on the ...
by nroff-man
Tue Dec 10, 2013 12:21 pm
Forum: Automation, sensing and robotics
Topic: Add small cpu for R/C servo controlled
Replies: 124
Views: 38013

Re: Add small cpu for R/C servo controlled

Good day. Outstanding work, nroff-man! Thanks for bringing it to my attention. I see you tested an 18LF27J53. Did you do so using a Raspberry Pi and the breadboard method? I'm curious how long it takes given the large amount of memory this chip has compared to most others.... Thanks for your comment...
by nroff-man
Mon Dec 09, 2013 4:20 pm
Forum: Automation, sensing and robotics
Topic: Add small cpu for R/C servo controlled
Replies: 124
Views: 38013

Re: Add small cpu for R/C servo controlled

Hi The pic18J series have a few more differences than just erase timing. For example, these devices have `volatile configuration' which means that the configuration registers are in RAM and not flash. Also, they have no IDLOC. This doesn't really have a great impact though, because instead of progra...
by nroff-man
Fri Oct 04, 2013 11:45 pm
Forum: Add-ons
Topic: Raspberry PI-C (Velleman K8048 / VM111)
Replies: 2
Views: 2276

Re: Raspberry PI-C (Velleman K8048 / VM111)

Hello. It's been a while but I got around to updating the code and documentation for the GPIO support with direct connection to a PICMicro on a breadboard rather than via an interface to the Velleman kit. The update includes PGM pin support and a command line tool to RESET a connected device. For th...
by nroff-man
Thu Dec 06, 2012 6:51 pm
Forum: General discussion
Topic: Some kind of selector knob?
Replies: 8
Views: 3930

Re: Some kind of selector knob?

hi

you need to google for a rotary switch.

something like `12 way rotary switch' ought to do it.

Bye

Edit: spelling
by nroff-man
Thu Nov 29, 2012 8:06 pm
Forum: Add-ons
Topic: Raspberry PI-C (Velleman K8048 / VM111)
Replies: 2
Views: 2276

Re: Raspberry PI-C (Velleman K8048 / VM111)

Lo The first two links above are now out of date, also, the documentation has been updated to include the R-PI C/W a stripboard interface example. See here: http://dev.kewl.org/k8048/Doc/ Since the last message I also added PIC baseline (12-bit) support since I had a few devices sitting here yearnin...
by nroff-man
Fri Nov 09, 2012 6:46 pm
Forum: Advanced users
Topic: /dev/mem user access
Replies: 6
Views: 16016

Re: /dev/mem user access

hi you can make your binary setuid root else use sudo. if you use the former then you may do it like this: chown 0:0 mybin chmod u+s mybin after you open /dev/mem you may then setuid(getuid()) to continue running as the user. if you prefer sudo, then you could create a shell alias Eg. alias mybin='s...
by nroff-man
Thu Nov 08, 2012 12:10 am
Forum: Add-ons
Topic: Raspberry PI-C (Velleman K8048 / VM111)
Replies: 2
Views: 2276

Raspberry PI-C (Velleman K8048 / VM111)

Hi there. Not really sure if this is the correct BB area or not but this will do. I have updated my software which may program a microchip PIC on a Velleman k8048 to now work using the R-PI GPIO. Two caps, 3 resistors and a single I.C. (74HC03) are adequate to interface the two devices together and ...
by nroff-man
Sat Sep 29, 2012 6:35 pm
Forum: General discussion
Topic: rev2 from RS?
Replies: 20
Views: 3081

Re: rev2 from RS?

Hi

I got a automated response claiming to be from
donotreply AT rstest DOT com

I don't believe RS own that domain yet I also don't
believe it to be anything but a legitimate response.

Bye
by nroff-man
Sat Sep 29, 2012 1:35 pm
Forum: General discussion
Topic: New IT (UK) Supplier
Replies: 178
Views: 25373

Re: New IT (UK) Supplier

Good afternoon. Just a quick note to thank NEWIT for their great service. Also arrived today was this http://www.ebay.co.uk/itm/180966867922 case and a PSU from argos on ebay with the free voucher someone kindly posted on the forum. DELIVERY640.jpg I am now ready for action. RUNNING640.jpg Cheers
by nroff-man
Thu Sep 27, 2012 9:11 pm
Forum: General discussion
Topic: New IT (UK) Supplier
Replies: 178
Views: 25373

Re: New IT (UK) Supplier

Hi

Earlier I made an order there for an RPI (MADE IN THE UK!).

I am normally quite reluctant to use a new (to me at least)
online vendor but I can report that they accept PAYPAL and
I used that and the transaction went ahead smoothly.

I now look forward to the item's arrival (at last).

Bye
by nroff-man
Thu Sep 27, 2012 7:05 pm
Forum: General discussion
Topic: rev2 from RS?
Replies: 20
Views: 3081

Re: rev2 from RS?

Hi, just a conclusion. According to http://www.raspberrypi.org/phpBB3/viewtopic.php?f=23&t=18576 the current batch of 40,000 items is R1. The next batch scheduled for November which are order item number 150000 and over will be R2. I have cancelled now. It was almost worth waiting for but not any mo...
by nroff-man
Wed Sep 26, 2012 2:59 pm
Forum: General discussion
Topic: rev2 from RS?
Replies: 20
Views: 3081

Re: rev2 from RS?

Lo. Thanks for the advice, I have looked around the forum and it seems hit and miss regarding receiving an R2 board or not from FARNELL. I am in London, England and that would appear to make no difference. With regard to RS, I will give them the chance to deliver. They have been incompetent so far a...
by nroff-man
Wed Sep 26, 2012 11:10 am
Forum: General discussion
Topic: rev2 from RS?
Replies: 20
Views: 3081

Re: rev2 from RS?

Good day. I think we have all been reasonably patient waiting for delivery from RS. My own order was made on the 27th of June. However, should the next batch be a R1 board and not an R2 then I will be definitely sending it straight back for a refund and eventually will go to FARNELL. I suggest every...
by nroff-man
Mon Aug 20, 2012 8:24 pm
Forum: Beginners
Topic: Hostname web server problem
Replies: 5
Views: 2451

Re: Hostname web server problem

LO

You need to edit the hosts file on the machine you are
connecting *from* since this is where the name is looked
up prior to creating a connexion to the RPI.

See: http://en.wikipedia.org/wiki/Hosts_%28file%29

bye
by nroff-man
Sun Aug 19, 2012 1:42 pm
Forum: Beginners
Topic: unable to understand "cp"
Replies: 10
Views: 2652

Re: unable to understand "cp"

Hi.

You may find it easier to format your drive using ext2 then
if you need to access the drive from elsewhere use `Ext2Fsd'.

Bye
by nroff-man
Wed Aug 15, 2012 2:52 am
Forum: Beginners
Topic: ssh rsa key problem
Replies: 3
Views: 1076

Re: ssh rsa key problem

Hi

When you login you should get a message explaining which
line of your known_hosts file the original key exists at.

You can simply edit that file ~/.ssh/known_hosts and delete
the line.

bye.
by nroff-man
Wed Aug 01, 2012 9:11 am
Forum: Troubleshooting
Topic: RS232 interface logon disable
Replies: 3
Views: 650

Re: RS232 interface logon disable

lo

look at /etc/inittab

specifically the line with getty -L ttyAMA0

read the man page for getty, look at the
-l option.

change that line to run /bin/bash
instead of login

send a HUP to PID 1 and it should work

bye

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