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by wolf.z
Fri Sep 20, 2019 4:01 pm
Forum: Interfacing (DSI, CSI, I2C, etc.)
Topic: Ublox Neo 6M GPS module not changing coords.
Replies: 23
Views: 266

Re: Ublox Neo 6M GPS module not changing coords.

On the risk of carrying coals to Newcastle: You are saying you checked with cgps, and everything was fine. Since cgps is a gpsd client, I suggest you are trying to read from a serial port, a running gpsd is using already. If this is the case, stop gpsd and retry. However, reading from gpsd rather th...
by wolf.z
Fri Sep 20, 2019 3:39 pm
Forum: Beginners
Topic: wlan0 doesn't get an IP Address
Replies: 5
Views: 93

Re: wlan0 doesn't get an IP Address

After brief study of the ip command I wonder, the script is working at all. I suggest, there is a "dev" in "ip link set (dev) eth0 down" missing? Secondly, I doubt, the" ip link" command uses any setting form dhcpcd.conf. "ip address" will assign addresses. Rather try restarting the networking daemo...
by wolf.z
Thu Sep 05, 2019 9:10 pm
Forum: Troubleshooting
Topic: enabling bluetooth on pi zero actually wrecks the whole wifi network
Replies: 3
Views: 118

Re: enabling bluetooth on pi zero actually wrecks the whole wifi network

WIFI except those with an a following IEEE802.11 and bluetooth share the same radio frequency band. Using both causes some degradation in radio performance. Typically no wreckage happens. So the only chance, bluetooth migth screw up your WIFI physically was if many other WIFI networks compete and sw...
by wolf.z
Wed Feb 20, 2019 8:23 pm
Forum: Beginners
Topic: Supplying Raspberry pi Zero with Lipo battery
Replies: 3
Views: 351

Re: Supplying Raspberry pi Zero with Lipo battery

In case, you are referring to this product https://shop.pimoroni.de/products/powerboost-1000-charger-rechargeable-5v-lipo-usb-boost-1a-1000c be aware, that power supplies for Raspberries are 2A rated or even 2.5 for the latest Raspberry 3. With a battery management thing alike, you have to make sure...
by wolf.z
Mon Feb 18, 2019 8:30 pm
Forum: Networking and servers
Topic: WiFi Bridge
Replies: 9
Views: 955

Re: WiFi Bridge

Your first Pi acts as a router. It is supposed to span a WIFI. If you want add a second acces point with a Pi, configure it as a bridge as you said, connect the second Pi via ethernet switch. Omit anything DNS or DHCP on the bridging Pi. In case, you want connect the second Pi via the first Pi's WIF...
by wolf.z
Sat Feb 09, 2019 7:06 pm
Forum: Troubleshooting
Topic: MicroSD-card has become readonly
Replies: 9
Views: 1013

Re: MicroSD-card has become readonly

If even the SD card formatter fails resuscitating, better dispose your card.
by wolf.z
Mon Jan 21, 2019 11:51 pm
Forum: General discussion
Topic: How to approach my project!?
Replies: 4
Views: 325

Re: How to approach my project!?

Concerning the power issue, a solar cell setup for direct supply appears to be very bulky. Let me explain this with some assumptions. The most hungry Pi, namely the Pi3B draws 1.34 A if stressed. See https://www.raspberrypi.org/documentation/faqs/ section Power / What are the power requirements? Tha...
by wolf.z
Mon Jan 21, 2019 12:08 am
Forum: Beginners
Topic: Just joined, I have a wifi question
Replies: 5
Views: 518

Re: Just joined, I have a wifi question

You cannot bridge two WIFI networks. https://www.raspberrypi.org/forums/viewtopic.php?t=100053 It is a matter of networking standards, not the Pi. Rather, you have to setup your acces point with an own network, let the Pi act as a router for routing and doing NAT in between the network, WLAN0 is in ...
by wolf.z
Thu Dec 27, 2018 3:02 pm
Forum: General discussion
Topic: Need a case, heatsinks and fan. Also "is this a bad case?"
Replies: 64
Views: 3975

Re: Need a case, heatsinks and fan. Also "is this a bad case?"

As a first hands on, the Flirc case maintains about 8-10°C less in my case, probably even less CPU temp compared to a plastic case. That's a lot. Concerning fans, you should think of fans as 1) dirt and dust blowers 2) annoying sound sources, the smaller, the annoying. There were issues with cheap f...
by wolf.z
Sat Nov 10, 2018 11:41 am
Forum: Raspbian
Topic: Duplicate an image using Win32DiskImager doesn't work
Replies: 13
Views: 1283

Re: Duplicate an image using Win32DiskImager doesn't work

OK, thank you for clarification. However, in this context, the difference makes no difference. Besides: At least there were times, when erase block sizes equalled far less multiples of the NAND page size, starting with few kB long ago. Concerning wear optimization: Which one method cloning an SD car...
by wolf.z
Fri Nov 09, 2018 5:26 pm
Forum: Raspbian
Topic: Duplicate an image using Win32DiskImager doesn't work
Replies: 13
Views: 1283

Re: Duplicate an image using Win32DiskImager doesn't work

Summing up, quite often a direct copy with tools like win32imager fails, since SD cards of equally promoted size may have few kBytes differences in capacity. If the target is smaller in size than the source, an imager fails. Now there's two ways for a headless system for proceeding. If you want just...
by wolf.z
Fri Nov 09, 2018 10:24 am
Forum: Networking and servers
Topic: [solved] WIFI driver for RTL8811AU 5GHz outdoor channels
Replies: 1
Views: 980

Re: WIFI driver for RTL8811AU

OK, after having tried outdoor 5GHz channels with a different hardware based on rt5572 chip with no success, I stumbled across the hostapd wiki. Result: All channels other than 36, 40, 44, and 48 including all outdoor channels require frequency management, DFS. There are only three drivers for Ather...
by wolf.z
Tue Nov 06, 2018 11:42 am
Forum: Troubleshooting
Topic: RPI-1(B) WiFi nl80211
Replies: 7
Views: 610

Re: RPI-1(B) WiFi nl80211

As fruitoftheloom stated, use Mr. Engman's script, works like charm for Realtek RTL88xx chips. https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=178405 second post. The following will be all you have to do. sudo wget http://www.fars-robotics.net/install-wifi -O /usr/bin/install-wifi sudo chmod...
by wolf.z
Thu Nov 01, 2018 8:41 pm
Forum: Networking and servers
Topic: [solved] WIFI driver for RTL8811AU 5GHz outdoor channels
Replies: 1
Views: 980

[solved] WIFI driver for RTL8811AU 5GHz outdoor channels

I followed Mr. Engman's instructions from this post: https://www.raspberrypi.org/forums/viewtopic.php?f=63&t=178405 After calling install-wifi, magically my WIFI stick Logilink WL0238 (RTL8811AU) worked. Even AP mode is possible and it works like charm. However, it seems serveral advanced features w...
by wolf.z
Thu Oct 25, 2018 9:34 pm
Forum: Media centres
Topic: New TV Tuner from HQ
Replies: 131
Views: 41804

Re: New TV Tuner from HQ

... Bummer, yeah, that's right ATSC...Most of the world has DVB-T (I guess) ... I think the differences are minor so most things I see do both, probably with the same chip. .. No. DVB uses the very latest in modulation, OFDM, versus ATSC using 8VSB. The RTL2832U does demodulate that OFDM in hardwar...
by wolf.z
Wed Oct 17, 2018 10:01 pm
Forum: Networking and servers
Topic: Two wire cable for networking
Replies: 6
Views: 949

Re: Two wire cable for networking

Well, look, what the Raspberry brings with it. It is all typical computer interfaces, meant for rather local communications: SPI, I2C, EIA232, DPI, USB, HDMI, even Ethernet. That's all stoneage binary physics communication. GBit ethernet is the very first attempt to make things different but in scop...
by wolf.z
Fri Oct 12, 2018 9:16 am
Forum: Troubleshooting
Topic: Ethernet cable issue interfacing usrp N210 with Pi3
Replies: 5
Views: 560

Re: Ethernet cable issue interfacing usrp N210 with Pi3

Most of the times RTFM helps. "The USRP2 only supports Gigabit Ethernet and will not work with a 10/100 Mbps interface." The Raspberry 3 has 100 Base Ethernet only, unless you own a Raspberry 3b+. You never will get any connection directly between USRP2 and Raspberry 3. Your cable seems OK since any...
by wolf.z
Thu Oct 11, 2018 6:35 am
Forum: Troubleshooting
Topic: Strange Wifi connection issue
Replies: 5
Views: 415

Re: Strange Wifi connection issue

...I create the WAN with a mobile phone,... ... but if I try to create the same WAL with the same SSID with the same password it's so difficult for the raspberry to connect there... ...I checked it with a LAN scanner... ...one time it worked with the different phone.... Well, that's difficult to re...
by wolf.z
Wed Oct 10, 2018 6:32 pm
Forum: Networking and servers
Topic: wi fi interface
Replies: 3
Views: 439

Re: wi fi interface

davetommo wrote:
Wed Oct 10, 2018 10:32 am
...the other one says no wi fi interface,...
What by what command says no wifi? Try iwconfig.
by wolf.z
Wed Oct 10, 2018 6:08 pm
Forum: Troubleshooting
Topic: Getting GPS (BU-353) to work with Pi3b+ and Stretch
Replies: 10
Views: 985

Re: Getting GPS (BU-353) to work with Pi3b+ and Stretch

...spent much too many hours of my lifetime with an annoying bug of Raspbian Jessie with gpsd. Therefore: Before involving gpsd check for anything, coming from your ttyUSB0. Use stty -F /dev/ttyXXX ispeed 4800 && cat </dev/ttyXXX replace ttyXXX with the filename of the port. from: http://www.catb.or...
by wolf.z
Wed Oct 10, 2018 3:23 pm
Forum: Networking and servers
Topic: Two wire cable for networking
Replies: 6
Views: 949

Re: Two wire cable for networking

That is two different approaches. DSL modems will give a full fledged IP Network bridge. With that modems you'll get everything in one box: Hardware and software and basically a no-brainer setup. When it comes to EIA 232/422/485 communication, yes, that's kind of networking. But you won't get a no-b...
by wolf.z
Wed Oct 10, 2018 9:13 am
Forum: Networking and servers
Topic: Two wire cable for networking
Replies: 6
Views: 949

Re: Two wire cable for networking

DSL modems come into my mind. However, I never did try that: Search for the phrase "DSL master-slave pair" or SDSL/SHDSL modem like https://www.digicomm.de/en/products/shdtu-09-is-ethernetmodem/ or https://www.allnet.de/en/allnet-brand/produkte/alle-produkte/p/allnet-all-mc115vdsl2-vdsl2-100-mbit-mi...
by wolf.z
Tue Oct 09, 2018 4:25 pm
Forum: C/C++
Topic: I2C, ready condition?
Replies: 0
Views: 525

I2C, ready condition?

I have a BME280 connected via I2C. In order to read the sensor's measures I use this program from a mate: https://github.com/Jarthianur/sensorics Everything works fine if invoked some time after boot. Invoking the program in rc.local results in false readings. I could noct figure out, what time is n...
by wolf.z
Mon Oct 08, 2018 12:15 am
Forum: Troubleshooting
Topic: No wifi with old PI model B and Ralink card..
Replies: 7
Views: 472

Re: Pi3B Rev1.2 - Boot Problems with Stretch

pcmanbob wrote:
Sun Oct 07, 2018 12:49 pm
... wpa_supplicant.conf which now needs the country code in...

Code: Select all

...
country=GB
...
by wolf.z
Thu Oct 04, 2018 9:53 pm
Forum: Networking and servers
Topic: IP changes to APIPA
Replies: 12
Views: 1038

Re: IP changes to APIPA

I haven't configured a country code. Down below is a sample of my wpa_supplicant file. Country code is mandatory on Raspbian Stretch It's only mandatory until you uninstall the remarkably insane rfkill package and the raspberrypi-net-mods that activates rfkill. I'd recommend specifying a country co...

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