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by edo1
Fri Apr 08, 2016 2:09 pm
Forum: General discussion
Topic: Partitioning Scheme (SD & HDD)
Replies: 34
Views: 5751

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: 4988

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: 854

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: 1452

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: 1510

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: 2718

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: 3291

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: 9793

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: 15
Views: 6433

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: 2129

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: 9793

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: 10240

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: 10240

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: 887

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: 940

Re: SD Card Corruption

is used power supply good enough?
by edo1
Thu Mar 24, 2016 12:15 pm
Forum: Advanced users
Topic: store logs on usb flash drive for 24/7 operation
Replies: 8
Views: 2412

Re: store logs on usb flash drive for 24/7 operation

I am planning to use my raspberry for some home automation tasks. So it should operate continuously, 24/7. IMHO you should use readonly SD card if you need 24/7. you could store logs on usb flash, yes. but you must be prepared that someday this flash breaks. maybe better option is to use some netwo...
by edo1
Thu Mar 24, 2016 12:51 am
Forum: Advanced users
Topic: UART, SPI : chasing the bottleneck
Replies: 4
Views: 887

Re: UART, SPI : chasing the bottleneck

Could you provide more details?
by edo1
Thu Mar 24, 2016 12:50 am
Forum: Beginners
Topic: which USB 1.1 and USB 2.0 devices to which USB port?
Replies: 11
Views: 1740

Re: which USB 1.1 and USB 2.0 devices to which USB port?

ALL will downgrade even if just one 1.1 is plugged to either one?? no from wikipedia: Any USB 2.0 hub that supports a higher standard than USB 1.1 (12 Mbit/s) will translate between the lower standard and the higher standard using what is called a transaction translator (TT). For example, if a USB ...
by edo1
Wed Mar 23, 2016 10:46 pm
Forum: Troubleshooting
Topic: Corrupted micro SD card
Replies: 6
Views: 990

Re: Corrupted micro SD card

supermario3 wrote:How can I fix it?
buy new one
by edo1
Wed Mar 23, 2016 2:21 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Device connection to RPi (GPIO or SPI/I2C)
Replies: 6
Views: 1124

Re: Device connection to RPi (GPIO or SPI/I2C)

jesus_malaga wrote:is what you need
are you sure that it is suitable for 10m link?
by edo1
Wed Mar 23, 2016 1:03 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Device connection to RPi (GPIO or SPI/I2C)
Replies: 6
Views: 1124

Re: Device connection to RPi (GPIO or SPI/I2C)

there is a lot of information, google for "raspberry can bus" and/or "raspberry mcp2515"
by edo1
Tue Mar 22, 2016 11:04 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Device connection to RPi (GPIO or SPI/I2C)
Replies: 6
Views: 1124

Re: Device connection to RPi (GPIO or SPI/I2C)

If I have simple device (like magnetic sensor, motion senzor or relay) all I need to control them is assign 1 bit to relay and read 1 bit from magnetic senzor. In that case I do not need any special bus like SPI/I2C, right? right you couldn't connect "simple device" to those buses, only designed fo...
by edo1
Tue Mar 22, 2016 10:21 pm
Forum: Automation, sensing and robotics
Topic: Using an I2C expander to connect multiple distance sensors?
Replies: 35
Views: 4768

Re: Using an I2C expander to connect multiple distance senso

No, you cannot use one output pin in common due to multi-path interference you can only use one sensor at a time. ok, it seems to be a bad idea. ...and all the sensors would be driving the output line (it's not open collector). Those not sensing would be driving it low. The one sensing would be try...

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