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by edo1
Thu Apr 14, 2016 7:26 pm
Forum: General discussion
Topic: Pressure Detection System
Replies: 3
Views: 787

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: 8885

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: 472

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: 25465

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: 8779

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: 7445

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: 8885

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
?
by edo1
Fri Apr 08, 2016 2:09 pm
Forum: General discussion
Topic: Partitioning Scheme (SD & HDD)
Replies: 34
Views: 7445

Re: Partitioning Scheme (SD & HDD)

What about partitioning my SD card (32GB) and using some of its storage HDD is more reliable if you want to save your data. so I suggest you use SD card only for /boot partition. If the root filesystem is on your HDD you won't need a 16GB SDcard, it's going to hold no more than 56MB of data. Save y...
by edo1
Fri Apr 08, 2016 1:24 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: usb problem with GSM modem
Replies: 14
Views: 6284

Re: usb problem with GSM modem

IMHO it is better to publish your patch on github or something like that.
by edo1
Wed Apr 06, 2016 1:48 pm
Forum: Troubleshooting
Topic: Raspian Kernel build process/errs
Replies: 3
Views: 1010

Re: Raspian Kernel build process/errs

you do not need sudo for kernel build.

try this before modules_install:

Code: Select all

make ARCH=arm CROSS_COMPILE=arm-linux-gnueabihf- zImage modules
by edo1
Mon Apr 04, 2016 10:03 am
Forum: Troubleshooting
Topic: Bypassing the fuse
Replies: 11
Views: 1861

Re: Bypassing the fuse

Duhjoker wrote:The max output of my adafruit charger is 5.2v can the Pi handle .2v extra?
definitely not.
It wouldn't cause any issue until your charger is broken.
by edo1
Sun Apr 03, 2016 10:41 pm
Forum: General discussion
Topic: Fat32 Root Filesystem
Replies: 9
Views: 2042

Re: Fat32 Root Filesystem

kusti8 wrote:You wouldn't be able to anyway because Windows won't recognize anything past the first partition.
there is no necessity in separate boot partition with fat32 root.
by edo1
Fri Apr 01, 2016 10:18 pm
Forum: Advanced users
Topic: Raspberry Pi 3 Specs
Replies: 9
Views: 2987

Re: Raspberry Pi 3 Specs

Hericks wrote:Okay, so the USB ports are still unable to support larger consuming USB devices without the use of a self-powered USB hub.
AFAIK you could use this hack with pi3 too:
http://hackaday.com/2015/04/06/more-pow ... usb-ports/
by edo1
Fri Apr 01, 2016 6:29 pm
Forum: Beginners
Topic: Will it break by continously improper shutdown?
Replies: 22
Views: 4626

Re: Will it break by continously improper shutdown?

To do this I could use dedicated Raspberry SD card partition or external USB flash drive. your data could be lost anyway. but second approach give more chances to keep system bootable after disaster. I don't know does it matter to you or not. Let's suppose I'll update daily file (if I'll append 200...
by edo1
Tue Mar 29, 2016 10:29 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Raspberry 3B and Serial Port
Replies: 11
Views: 11083

Re: Raspberry 3B and Serial Port

Also, you can use ttyAMA0 as second uart and have it accessible on GPIO header but for this you need to use device-tree overlay - but you won't be able to use BT by doing this. with the new pi3-miniuart-bt overlay, Bluetooth works fine and stable with the Mini UART https://www.raspberrypi.org/forum...
by edo1
Tue Mar 29, 2016 9:18 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Power on behaviour
Replies: 16
Views: 8134

Re: Power on behaviour

wfold wrote:gpio 17,23,24,25 did enable on power on for ~1sec
I use pins 17 and 23 to relay control (as well as 18, 22, 27).
I do not have such issue (there is no relay click on poweron or reboot)
by edo1
Tue Mar 29, 2016 8:27 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: SPI bus and distance
Replies: 4
Views: 2774

Re: SPI bus and distance

RPI is cheap enough, you can use several RPIs and connect them through ethernet.

or you could google for long distance SPI solutions like
http://e2e.ti.com/blogs_/b/analogwire/a ... technology
by edo1
Mon Mar 28, 2016 4:23 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Raspberry 3B and Serial Port
Replies: 11
Views: 11083

Re: Raspberry 3B and Serial Port

which UART are you using?
default is mini-UART now (ttyS0), but you still could use ttyAMA0 as well:
viewtopic.php?t=138223
by edo1
Sun Mar 27, 2016 9:48 am
Forum: General discussion
Topic: How reliable is the Raspberry Pi 3
Replies: 19
Views: 12338

Re: How reliable is the Raspberry Pi 3

A bad SD card can easily corrupt even with a read only root. SD card must be very-very bad if such things occur ))) I haven't got enough experience with SD cards yet. I used over 100 USB flash drives in production for a years. They are unreliable. Different brands have been tested, no reliable foun...
by edo1
Sat Mar 26, 2016 10:46 pm
Forum: General discussion
Topic: How reliable is the Raspberry Pi 3
Replies: 19
Views: 12338

Re: How reliable is the Raspberry Pi 3

I don't know if anyone got to the bottom of the corruption a few people were reporting having even with read-only systems which suggested there was more to it than not writing to cards. Sorry, English is not my mother tongue. Does this sentence mean that there are SD card corruptions even if SD car...
by edo1
Thu Mar 24, 2016 12:56 pm
Forum: Advanced users
Topic: UART, SPI : chasing the bottleneck
Replies: 4
Views: 1075

Re: UART, SPI : chasing the bottleneck

I re-read your message. frames from the uC are corrupted : too short, too long, unexpected character in the middle , etc It is very strange, I could imagine software-caused bytes loss (if serial interrupt isn't served for a while), but extra/bad bytes seem to be hardware issue. I'm pretty sure it is...
by edo1
Thu Mar 24, 2016 12:35 pm
Forum: Troubleshooting
Topic: SD Card Corruption
Replies: 6
Views: 1168

Re: SD Card Corruption

is used power supply good enough?

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