Go to advanced search

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: 1587

[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: 45582

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: 1114

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: 752

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: 522

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: 535

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: 1417

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: 1114

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: 1114

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: 564

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: 604

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: 1327

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...
by wolf.z
Thu Oct 04, 2018 4:26 pm
Forum: Networking and servers
Topic: IP changes to APIPA
Replies: 12
Views: 1327

Re: IP changes to APIPA

The signal is fine, I have the warehouse full covered... Another Pi3 user actually is facing connection losses too without any automatic reconnect and can't figure out, why. To narrow your problem: How big is your warehouse, how many access points are involved, and have you set up some kind of band...
by wolf.z
Thu Oct 04, 2018 2:50 pm
Forum: Advanced users
Topic: PPS driven NTP problems
Replies: 4
Views: 1348

Re: PPS driven NTP problems

Unfortunately the link to the Raspberry wiki and GPS hat is dead, so I can't check for the pinout... Despite a danger of carrying coal to Newcastle. Are you aware of the pin schemes that are with the Pi? If you brought both the antenna plus the hat outside, you may use cabling involving a false pin....
by wolf.z
Thu Oct 04, 2018 9:13 am
Forum: Advanced users
Topic: PPS driven NTP problems
Replies: 4
Views: 1348

Re: PPS driven NTP problems

OK, there is more to check. First of all, a GPS needs 4 satellites reception in order to get precise time. Thus, a PPS will never happen unless a good GPS reception state is established. Likely you have to place the hat (and Pi) outdoors or near a window not metal-coated for reasons of thermal insul...
by wolf.z
Wed Oct 03, 2018 8:31 am
Forum: Troubleshooting
Topic: What do these diagnostics mean?
Replies: 9
Views: 890

Re: What do these diagnostics mean?

Well, the last boot screen entry points out a kernel panic with reason "can't mount root filesystem". Sadly I am no expert on what the reason might be, but I suggest there is something wrong with the the SD card, better, image written to. The error was discussed several times. e.g. https://www.raspb...
by wolf.z
Wed Oct 03, 2018 8:13 am
Forum: Troubleshooting
Topic: 2 pi's with 2 different power supplies both corrupting
Replies: 3
Views: 382

Re: 2 pi's with 2 different power supplies both corrupting

The brown out theory is a trustworthy one since both cards get corrupted at the same time suggestedly. As said above, there are devices existing, causing large voltage drops (fluctuations) on mains. Could be microwave oven, TV set, heater, large machines in the neighbourhood... However what irritate...
by wolf.z
Tue Oct 02, 2018 9:14 pm
Forum: Troubleshooting
Topic: wifi dies
Replies: 8
Views: 759

Re: wifi dies

Have you tried my suggestion, using a single band, fixed channel setup? Adding anything wifi to anything list does not clarify since your wifi works for some time. The anything other wifi is just another wifi that might work and is in reach. I am afraid you have to give more details on both your rou...
by wolf.z
Tue Oct 02, 2018 8:50 am
Forum: General discussion
Topic: 5 volts 5 amps power supply on raspberry pi 3 model b+
Replies: 14
Views: 1870

Re: 5 volts 5 amps power supply on raspberry pi 3 model b+

Please consider max amp ratings of connectors. Micro USB: Micro USB and charger were standardized by an EU initiative with respect of having a standard device charger an a standard connector. The max rating is 1.5A. So even 2.5A is beyond rating. I highly recommend not to pipe 5 A through a Micro US...
by wolf.z
Mon Oct 01, 2018 9:25 pm
Forum: Beginners
Topic: Direct Connection To Pi (Over Ethernet)
Replies: 4
Views: 469

Re: Direct Connection To Pi (Over Ethernet)

Set up you Pi to be an access point. Then can connect to it (WiFi) and once connected, log in. I have a Pi0W that runs that way. Granted, I don't use a VNC connection, but I can't see any reason why it wouldn't work (I just do a ssh session to it). I followed your guidance and it turned out great! ...
by wolf.z
Mon Oct 01, 2018 8:36 pm
Forum: Automation, sensing and robotics
Topic: Will gps with raspberry work inside home?
Replies: 9
Views: 1465

Re: Will gps with raspberry work inside home?

A GPS repeater can greatly improve GPS accuracy indoors. A quick Google found this: https://www.gps-repeaters.com/ Nope. A repeater can greatly improve reception. Any increase in accuracy? Only holds true for position of the receiveing end's antenna of the repeater: All GNSS devices indoor/receivin...
by wolf.z
Sun Sep 30, 2018 9:01 am
Forum: Troubleshooting
Topic: wifi dies
Replies: 8
Views: 759

Re: wifi dies

The extension is 5m long. The router transmits 2.4 and 5Ghz simultaneously Mmmh, little detail. Involving the crystal ball: Try a single band fixed channel setup -> disable 5Ghz hotspot and choose channel manually. With dual band setup there is a chance, any band-steering functionality does not wor...
by wolf.z
Sat Sep 29, 2018 9:47 pm
Forum: General discussion
Topic: Simple battery circuit feasible?
Replies: 16
Views: 2789

Re: Simple battery circuit feasible?

... I'm wondering if there is a small board I can use to "regulate" or "step up" the power to 5v w/o wasting too much power? disclaimer: I am an electronics noob so I need a "simple" solution :) Your initial idea lacks an under voltage protection. So your Li cells may have a short life. In addition...
by wolf.z
Sat Sep 29, 2018 9:18 pm
Forum: Automation, sensing and robotics
Topic: View CPU/CPI Usage
Replies: 3
Views: 604

Re: View CPU/CPI Usage

What is slow? 2 frames per minute? How did you connect both cameras?

You wrote: We have trying using the n/top in the command line but wasn’t what we were looking for.

What are you looking for?
by wolf.z
Sat Sep 29, 2018 9:14 pm
Forum: Troubleshooting
Topic: wifi dies
Replies: 8
Views: 759

Re: wifi dies

What hardware is your USB WIFI adapter? I noticed, the tiny Edimax dongle stops connection retry in unstable link conditions after some time. I can't say why since I just bought a different hardware rather than investigating. What physical standard have you configured? 2.4Ghz or 5Ghz? single band or...

Go to advanced search