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by Energia
Thu Mar 17, 2016 4:02 pm
Forum: Troubleshooting
Topic: External Hard Drive problems
Replies: 14
Views: 2602

Re: External Hard Drive problems

The problem could be with the powered hub (for example, some (most?) of them back-feed into RPi; though, I'm not sure if the problem is due to this). So, either try to directly connect the HDD to RPi (assuming you have the amperage and that "max usb thing" ON in boot.txt) or try another powered hub.
by Energia
Mon Mar 14, 2016 10:22 am
Forum: General discussion
Topic: pi 3 wifi range
Replies: 33
Views: 63410

Re: pi 3 wifi range

This solved WiFi problems for me:
sudo iwconfig wlan0 power off

I added that line to /etc/rc.local (before "exit 0") so that it would get executed on startup.

(I also upgraded the software:
sudo apt-get update
sudo apt-get upgrade
sudo apt-get dist-upgrade
)
by Energia
Fri Jul 17, 2015 12:54 pm
Forum: Advanced users
Topic: Linux kernel is now 4.0
Replies: 182
Views: 90773

Re: Linux kernel is now 4.0

Camera video stream doesn't work on 4.0 with this method (but raspivid works): sudo modprobe bcm2835-v4l2 cvlc v4l2:///dev/video0 --v4l2-width 1024 --v4l2-height 768 --v4l2-chroma h264 --sout '#standard{access=http,mux=ts,dst=0.0.0.0:12345}' Vlc doesn't close, but I get kernel messages right in cons...
by Energia
Fri Mar 06, 2015 12:33 pm
Forum: General discussion
Topic: pi2 USB power
Replies: 6
Views: 1034

Re: pi2 USB power

My 2.5' USB HDD eats around 1A at 5V. According to USB 2.0 specs, a single port can only provide up to 0.5A. RPi probably follows these specs, so you won't be able to power the HDD (it depends on the type) just with RPi's USB port. Also, the maximum current that is available to USB ports on RPi is a...
by Energia
Wed Feb 25, 2015 1:35 am
Forum: Automation, sensing and robotics
Topic: Bell sound, slow to respond
Replies: 1
Views: 442

Re: Bell sound, slow to respond

You could try using something like mplayer.
by Energia
Tue Feb 17, 2015 12:00 am
Forum: General discussion
Topic: Pi vs Pi2 as multimedia center
Replies: 12
Views: 9481

Re: Pi vs Pi2 as multimedia center

My pi2 is running Raspian and Kodi slapped on the top with a USB DVB-T stick and a 3TB drive for all the films. Kodi is instantly responsive on the Pi2 compared to the old Pi B+. A real pleasure to use. The MPEG2 codec is essential so that the GPU can decode DVB-T streams in the UK, but this was th...
by Energia
Sun Feb 15, 2015 12:43 pm
Forum: Advanced users
Topic: Compiling kernel for RPi 2?
Replies: 1
Views: 589

Compiling kernel for RPi 2?

Are these instructions (with minor changes) still correct for compiling the kernel for RPi 2 on RPi 2? git clone --depth=1 https://github.com/raspberrypi/linux sudo apt-get install bc cd linux make bcmrpi_defconfig make -j6 make -j6 modules sudo make modules_install sudo cp arch/arm/boot/Image /boot...
by Energia
Tue Feb 10, 2015 4:22 pm
Forum: Troubleshooting
Topic: MT7601U XiaoMi WIFI USB not working for 3.18.5+ kernel
Replies: 10
Views: 10520

Re: MT7601U XiaoMi WIFI USB not working for 3.18.5+ kernel

I try to compile from source using latest kernel 3.18.5+ I'm getting below error. make -C tools make[1]: Entering directory '/home/pi/Download/DPO_MT7601U_LinuxSTA_3.0.0.4_20130913/tools' gcc -g bin2h.c -o bin2h make[1]: Leaving directory '/home/pi/Download/DPO_MT7601U_LinuxSTA_3.0.0.4_20130913/too...
by Energia
Tue Feb 10, 2015 1:30 pm
Forum: Troubleshooting
Topic: MT7601U XiaoMi WIFI USB not working for 3.18.5+ kernel
Replies: 10
Views: 10520

Re: MT7601U XiaoMi WIFI USB not working for 3.18.5+ kernel

I'm trying to use xiaomi wifi too. The driver I use is downloaded from https://github.com/eywalink/mt7601u. It can be successfully compiled, but when I try to run modprobe the error occurs. ERROR: could not insert 'mt7601Usta': Exec format error I had this (on RPi 2, kernel7.img is, I presume, for ...
by Energia
Mon Nov 24, 2014 2:24 pm
Forum: Advanced users
Topic: What MOSFET to choose?
Replies: 1
Views: 532

What MOSFET to choose?

Hi, I'm a bit new to electronics. I need to turn on and off a device that needs 5v, 1A using a 3.3v pin from Arduino (3.3v)/RPi. I currently do it with TIP120, but there's a voltage drop of around 0.6-0.8v, meaning that I need to boost the voltage for the device, and there's a lot of power turned in...
by Energia
Thu Nov 06, 2014 4:28 pm
Forum: Troubleshooting
Topic: RPi stuck at boot if USB HDD is connected
Replies: 7
Views: 1698

Re: RPi stuck at boot if USB HDD is connected

Or what delay are you suggesting to "insert"? I mean, to put some delay in one of the early startup-scripts, for example, before 'udev'-service does his work. At least as a test ... A completly other idea for the the "non-working case" only: Can you see '/dev/sda1' and '/dev/sda2' and so on in this...
by Energia
Wed Nov 05, 2014 8:22 pm
Forum: Troubleshooting
Topic: RPi stuck at boot if USB HDD is connected
Replies: 7
Views: 1698

Re: RPi stuck at boot if USB HDD is connected

@ mad-hatter: The thread-opener said, that he uses a powered hub for the harddisk. So it is hard to believe, that a power-problem exists? (OK, may issues are depending on "a bad power", but not "all errors in world of raspberry" must do so?) @TO: First idea: The harddisk isn't fast enough available...
by Energia
Wed Nov 05, 2014 1:08 am
Forum: Troubleshooting
Topic: RPi stuck at boot if USB HDD is connected
Replies: 7
Views: 1698

Re: RPi stuck at boot if USB HDD is connected

I should also mention that HDD has GUID Partition Table and mostly HFS partitions. Maybe RPi/Raspbian does something on boot and gets stuck (I didn't wait for longer than few minutes)? This setup works fine with BeagleBone Black with Debian (it doesn't get stuck on boot and recognizes the HDD). Hell...
by Energia
Tue Nov 04, 2014 6:39 pm
Forum: Troubleshooting
Topic: RPi stuck at boot if USB HDD is connected
Replies: 7
Views: 1698

RPi stuck at boot if USB HDD is connected

Problem I have a powered USB hub connected to RPi. I have USB HDD connected to the hub. The problem is, if the hub is on, HDD is connected and if I turn RPi on, it gets stuck during boot. If I disconnect the HDD, turn on/off RPi, it loads normally. If I then connect HDD to the hub, it detects the H...
by Energia
Mon Oct 06, 2014 12:55 pm
Forum: Beginners
Topic: Powering Pi through 5v pin and limits
Replies: 1
Views: 317

Powering Pi through 5v pin and limits

I know it's possible to power RPi through the 5v pin. But what are the limits? What if I want to add a Pi camera module or an usb wifi stick or both to RPi? Is it possible to power all these things just by supplying current through Pi's 5v and GND pins?

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