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by edo1
Thu May 05, 2016 5:43 pm
Forum: Troubleshooting
Topic: Doing CAN using mcp2510
Replies: 11
Views: 2284

Re: Doing CAN using mcp2510

is it mainline kernel or raspberry kernel?
by edo1
Thu May 05, 2016 5:42 pm
Forum: C/C++
Topic: Raspberry board voltage
Replies: 18
Views: 2546

Re: Raspberry board voltage

AFAIK there is no integrated voltage meter.
by edo1
Wed May 04, 2016 12:25 pm
Forum: Troubleshooting
Topic: Doing CAN using mcp2510
Replies: 11
Views: 2284

Re: Doing CAN using mcp2510

have you compiled DT overlay? have you enabled it in config.txt?
which kernel version are you using?

P.S. why do you want to use mcp2510? it is outdated, mcp2515 is definitely better. mcp2510 isn't cheaper or easier to buy.
by edo1
Wed Apr 27, 2016 1:55 pm
Forum: Beginners
Topic: Aquarium water level sensor
Replies: 9
Views: 2539

Re: Aquarium water level sensor

simon88998 wrote:I am looking for a sensor that can detect if the water level of my aquarium is below of what it should be
you could use HC-SR04
by edo1
Wed Apr 27, 2016 6:18 am
Forum: Camera board
Topic: 5MP camera board cable
Replies: 5
Views: 881

Re: 5MP camera board cable

I have no issues with 60cm cables. I bought them on aliexpress.
by edo1
Tue Apr 26, 2016 7:51 pm
Forum: Raspbian
Topic: 3G dongles getting disconnected !!
Replies: 7
Views: 2033

Re: 3G dongles getting disconnected !!

another option: do not use usb hub at all, connect all dongles directly to RPi.
You need good RPi power supply to do that.
Possibly you need to use high-quality usb cables to get it working. Hardware mod could be necessary as well:
http://hackaday.com/2015/04/06/more-pow ... usb-ports/
by edo1
Tue Apr 26, 2016 7:43 pm
Forum: Raspbian
Topic: 3G dongles getting disconnected !!
Replies: 7
Views: 2033

Re: 3G dongles getting disconnected !!

alaa2003 wrote:dongle3 connected to Pi2
did you try with dongle3 connected to the hub?
by edo1
Tue Apr 26, 2016 7:32 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: CAN controller
Replies: 813
Views: 338837

Re: CAN controller

are both ends having same configuration? (speed and so on)
is there any error if you try to send ten packets?
did you enable terminating resistors? (see paragraph 1.6 of pican 2 user guide)
by edo1
Mon Apr 18, 2016 8:29 pm
Forum: General discussion
Topic: SD card speed
Replies: 9
Views: 43005

Re: SD card speed

To fully utilize the speeds for the card, you have to enable sd_overclock in /boot/config.txt is it safe? with any card? No. it has to be HC-1/UHS-1 or higher (like what you see here...U with a 1 or higher, or HC-I or higher). so is it safe with any uhs-1 card? (is such frequency covered by uhs-1 s...
by edo1
Mon Apr 18, 2016 8:23 pm
Forum: Troubleshooting
Topic: No USB power, 'over-current change'
Replies: 9
Views: 2695

Re: No USB power, 'over-current change'

IMHO this is a hardware failure, Pi must be replaced (or repaired if you have enough skills)
by edo1
Mon Apr 18, 2016 8:14 pm
Forum: Off topic discussion
Topic: Things I never want to see on a Raspberry Pi
Replies: 50
Views: 7745

Re: Things I never want to see on a Raspberry Pi

jamesh wrote:Blue LED's are worse because they are blue.
agreed
by edo1
Sun Apr 17, 2016 11:03 pm
Forum: Troubleshooting
Topic: Raspberry Pi 2 making weird noises
Replies: 11
Views: 2271

Re: Raspberry Pi 2 making weird noises

Are you sure about the sound source? Similar sounds could be produced by PSU
by edo1
Fri Apr 15, 2016 6:47 pm
Forum: General discussion
Topic: ARRGGH Power cuts.
Replies: 28
Views: 6195

Re: ARRGGH Power cuts.

KeithSloan wrote:Or do you mean I would arrange for the only file system on the SD card to be a read only root fs
you need totally avoid writing to sd card (and store all changeable data somewhere else)
by edo1
Fri Apr 15, 2016 6:37 pm
Forum: Linux Kernel
Topic: Kernel Panic with mainline Linux 4.5 on RPi2
Replies: 7
Views: 4952

Re: Kernel Panic with mainline Linux 4.5 on RPi2

DougieLawson wrote:Have you run mkknlimg to enable the device tree stuff in your kernel?
AFAIK that is necessary only if the kernel is loaded directly by a firmware, uboot was mentioned in the first post.
by edo1
Fri Apr 15, 2016 8:52 am
Forum: Raspbian
Topic: Raspbian Jessie find command
Replies: 11
Views: 2973

Re: Raspbian Jessie find command

Code: Select all

root@raspberrypi:~# find / >flist1
root@raspberrypi:~# find / >flist2
root@raspberrypi:~# egrep "^/[a-z]+$" flist1
/proc
/lib
/sys
root@raspberrypi:~# egrep "^/[a-z]+$" flist2
/proc
/lib
/sys
/bin
/usr
/media
/srv
/dev
/tmp
/root
/home
/opt
/run
/etc
/sbin
/boot
/var
/mnt
awesome
by edo1
Fri Apr 15, 2016 8:21 am
Forum: General discussion
Topic: SD card speed
Replies: 9
Views: 43005

Re: SD card speed

Rive wrote:To fully utilize the speeds for the card, you have to enable sd_overclock in /boot/config.txt
is it safe? with any card?
by edo1
Thu Apr 14, 2016 7:34 pm
Forum: Linux Kernel
Topic: Kernel Panic with mainline Linux 4.5 on RPi2
Replies: 7
Views: 4952

Re: Kernel Panic with mainline Linux 4.5 on RPi2

JosefR wrote:For me this looks like the binary is crashing. I am building the user-space part also on my own (using OpenEmbedded/Yocto) so there may also be a problem.
you could check your init with raspbian kernel and/or raspbian image with your kernel
by edo1
Thu Apr 14, 2016 7:26 pm
Forum: General discussion
Topic: Pressure Detection System
Replies: 3
Views: 648

Re: Pressure Detection System

abhi91 wrote:Im trying to connect a 0-6 bar pressure sensor which gives a 4-20 mA output, to a Raspberry Pi.
I suggest to use digital sensor like ABPMANT100PG2A3
by edo1
Tue Apr 12, 2016 8:26 am
Forum: General discussion
Topic: filesystem write files - after reboot the old data is back
Replies: 34
Views: 7322

Re: filesystem write files - after reboot the old data is ba

fruit-uk wrote:I have had that happen with USB sticks.
same here
by edo1
Sun Apr 10, 2016 9:26 pm
Forum: Troubleshooting
Topic: Sony SR16UY2A SD Cards
Replies: 1
Views: 393

Re: Sony SR16UY2A SD Cards

I use 8Gb UHS-I Sony card with rpi2 without any issue.
by edo1
Sun Apr 10, 2016 11:39 am
Forum: Other projects
Topic: Pi3 Z dimensions
Replies: 11
Views: 24582

Re: Pi3 Z dimensions

RetroNerd wrote:According to my research, the Z axis is 56mm.
are you kidding? It is definitely lower than 20mm. Maybe 16mm.
by edo1
Sat Apr 09, 2016 11:01 am
Forum: General discussion
Topic: Arduino Uno speed comparison
Replies: 34
Views: 7410

Re: Arduino Uno speed comparison

As many have said here already, if you need high speed and deterministic timing in your bit-banging it's better to do it on a dedicated processor like an Arduino or better still a Propeller. I can suggest STM32 also, you could find "stm32 minimum" card on aliexpress for about two bucks with free sh...
by edo1
Fri Apr 08, 2016 10:52 pm
Forum: General discussion
Topic: Partitioning Scheme (SD & HDD)
Replies: 34
Views: 5741

Re: Partitioning Scheme (SD & HDD)

darkbibble wrote:if I'm getting it right I need to divide my drive up into;

boot= 100mb
it should be on SD

SD card has one big fat32 partition out of box. You could use it as a boot without any reformatting - simply put firmware, kernel and appropriate files on it.
by edo1
Fri Apr 08, 2016 2:30 pm
Forum: General discussion
Topic: filesystem write files - after reboot the old data is back
Replies: 34
Views: 7322

Re: filesystem write files - after reboot the old data is ba

could you show output of these commands:

Code: Select all

df -h

Code: Select all

mount
?

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