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by Mithrandir
Thu Feb 25, 2016 1:20 pm
Forum: Troubleshooting
Topic: Official RPi Wifi Dongle not working
Replies: 15
Views: 2792

Re: Official RPi Wifi Dongle not working

Hi Rabus,

Mine worked fine on ubuntu one at a time, sounds like you have some other issue. maybe at the router end?
by Mithrandir
Tue Feb 23, 2016 1:31 pm
Forum: Troubleshooting
Topic: Official RPi Wifi Dongle not working
Replies: 15
Views: 2792

Re: Official RPi Wifi Dongle not working

are you trying to use 2 of these devices at the same time on the same network? I had a problem that they all have a default MAC address and one will connect but the second one on will not until I power down the first one. here was a thread about it. https://www.raspberrypi.org/forums/viewtopic.php?f...
by Mithrandir
Mon Feb 22, 2016 8:12 am
Forum: General discussion
Topic: Grounding static electricity.
Replies: 7
Views: 2362

Re: Grounding static electricity.

A 5v PSU suppling a Pi will not have an earth pin, so you can never discharge static via this. Pick up an anti static wrist strap if you are worried, these are a 1 meg resistor in line with the ground pin of an electrical earth, it will discharge your static but not give you a good path to earth if ...
by Mithrandir
Tue Feb 09, 2016 7:45 am
Forum: General discussion
Topic: official broadcom wifi adapter, duplicate mac addresses
Replies: 7
Views: 2375

Re: official broadcom wifi adapter, duplicate mac addresses

My only solution has been to manually edit the mac address in the driver file, luckily it appears as an ASCII string toward the end of the file, I used ghex and searched for the string. Just a warning, don't do this if using NOOBS, it has its own copy of the driver to enable wifi on start up, and I ...
by Mithrandir
Fri Jan 29, 2016 1:49 pm
Forum: Advanced users
Topic: Turn off Raspberry Pi Zero USB/Wifi
Replies: 11
Views: 7321

Re: Turn off Raspberry Pi Zero USB/Wifi

just a thought, how about cutting the 5v power line to the usb devices and feeding it from a solid state relay, driven by a gpio line. gpio pin high, power fed from 5v line to usb devices, gpio line low, device stops conducting, no power to usb devices. will give you a slight increase in current in ...
by Mithrandir
Wed Jan 27, 2016 11:42 am
Forum: Troubleshooting
Topic: Pi Zero USB does not work at all
Replies: 40
Views: 20686

Re: Pi Zero USB does not work at all

My first zero had a dry joint on the power pin to the usb. no 5V to the bus. easy fix. are you getting a connection from the 0V, 5V and data pins, there are 3 test pads underneath
PP1 USB +5V Input
PP6 GND
PP22 USB D+
PP23 USB D-
worth 30 seconds to buzz out with a meter.
by Mithrandir
Fri Jan 22, 2016 1:31 pm
Forum: General discussion
Topic: using a chromecast as a wireless display, is it possible?
Replies: 2
Views: 2598

using a chromecast as a wireless display, is it possible?

HI, I was wondering if anyone has set up a pi using a chromecast as a wireless display. I want to set up a pi zero in a keyboard/touchpad and a battery supply and cast the output to a chromecast to use the TV as a monitor, has anyone done this? I think it would give a cute little "laptop" type setup...
by Mithrandir
Thu Jan 14, 2016 8:10 pm
Forum: General discussion
Topic: usb devices [WiFi driver issue - Solved]
Replies: 9
Views: 2881

Re: usb devices

Thanks Trevor,

The fault was noobs was loading its own version of the brcmfmac.bin driver at first boot, and when raspbian came to load the wlan0 was already up and loaded with the default mac address.

Loaded Raspbian direct, tweaked the file and voila, it works first time.
by Mithrandir
Thu Jan 14, 2016 1:55 pm
Forum: General discussion
Topic: usb devices [WiFi driver issue - Solved]
Replies: 9
Views: 2881

Re: usb devices

Thanks Teveor, yes it is a NOOBS based install, and it would seem that the driver brcmfmac that is initially found is not the one that Raspbian uses after boot is complete. Any idea where the NOOBS firmware drivers are stored so I can try ammending the binary file there. The setup I have is not part...
by Mithrandir
Wed Jan 13, 2016 7:53 pm
Forum: Advanced users
Topic: ULN2803 Problem: LED and Motor (series)
Replies: 13
Views: 2506

Re: ULN2803 Problem: LED and Motor (series)

An LED in series will drop 1.7v approx across it, so your motor is only getting 3.3v across it and this is probably insufficient to drive it correctly. put the led in parallel ( with a series resistor) if you want light up on run, or a 1n4001 in series if you need blocking ( that will handle 1 Amp a...
by Mithrandir
Wed Jan 13, 2016 5:58 pm
Forum: General discussion
Topic: usb devices [WiFi driver issue - Solved]
Replies: 9
Views: 2881

Re: usb devices

got to the pi and did the requested actions, also I removed the hub/wifi adapter and repeated the actions. I have also included at the start the dmesg last few entries. I have manually edited the brcmfmac43143.bin file to contain the MAC address 00:90:4c:0e:61:27 instead of the default address 00:90...
by Mithrandir
Tue Jan 12, 2016 9:05 pm
Forum: General discussion
Topic: usb devices [WiFi driver issue - Solved]
Replies: 9
Views: 2881

Re: usb devices

sorry not got the pi at hand here, but the usb wifi is one of the y shaped official pi hub/wifi by broadcom, it is the bcm43143 device, and as such has a default mac address in it ( see my previous thread).I have fixed the Mac address in the driver file but after a power up if the device is attached...
by Mithrandir
Tue Jan 12, 2016 7:41 pm
Forum: General discussion
Topic: usb devices [WiFi driver issue - Solved]
Replies: 9
Views: 2881

usb devices [WiFi driver issue - Solved]

Hi, I have a strange request. I have a pi with a wifi dongle connected, if I boot with it in it does not get the correct driver, but if I power on the Pi without it connected and then plug in, or unplug and replug it it is fine. I want to use this setup in an embedded project and wondered if there i...
by Mithrandir
Tue Jan 12, 2016 10:08 am
Forum: General discussion
Topic: official broadcom wifi adapter, duplicate mac addresses
Replies: 7
Views: 2375

Re: official broadcom wifi adapter, duplicate mac addresses

Here is an email from Broadcom on this issue.... Seems these devices are going to be a problem to anyone using more than one -------- Original message -------- From: Hante Meuleman <[email protected].com> Date: 12/01/2016 09:13 (GMT+00:00) To: Mike Last <********************>, brcm80211-dev-list <br...
by Mithrandir
Sun Jan 10, 2016 12:15 am
Forum: General discussion
Topic: official broadcom wifi adapter, duplicate mac addresses
Replies: 7
Views: 2375

Re: official broadcom wifi adapter, duplicate mac addresses

done a bit more hunting and the file /root/lib/firmware/brcm/brcmfmac43143.bin has the mac address in it! this file is used in Ubuntu and Raspian, and this device has the same mac address on any machine I plug it into. I have edited the file in the noobs zip file and done a new install but this does...
by Mithrandir
Sat Jan 09, 2016 4:58 pm
Forum: General discussion
Topic: official broadcom wifi adapter, duplicate mac addresses
Replies: 7
Views: 2375

official broadcom wifi adapter, duplicate mac addresses

Hi, I am new to Pi land, and have recently setup a Pi Zero as a wifi dlna server using the Y shaped black and red Broadcom adapter. BCM43143 is the chip, and it has a MAC address of 00:90:4c:0e:81:23. Happy with this, I decided to get another, and so bought another broadcom wifi adapter/hub. Trouble...

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