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by wolf.z
Fri Nov 22, 2019 6:21 pm
Forum: Troubleshooting
Topic: Screen Is Very Dark
Replies: 4
Views: 247

Re: Screen Is Very Dark

Good grief, could be one hardware issue out of the following: Loose connection either adapter or cable Near full cable break, but not yet full Soon to die backlight of monitor Soon to die power supply of monitor So, if available try a different monitor and adapter, best just another HDMI monitor wit...
by wolf.z
Thu Nov 21, 2019 7:37 am
Forum: Troubleshooting
Topic: Cannot connect to wi-fi
Replies: 3
Views: 297

Re: Cannot connect to wi-fi

In the past, the RTL family of chipsets needed an extra install. Mr. Engman is kind of father for this driver. I cannot guarantee this is still necessary with Raspbian Buster but there is a still open issue concerning RTL chips: https://github.com/raspberrypi/linux/issues/3102 so, proceed with: http...
by wolf.z
Fri Nov 15, 2019 7:55 pm
Forum: Troubleshooting
Topic: eth0 and wlan0 have the same address on my Netgear router
Replies: 7
Views: 268

Re: eth0 and wlan0 have the same address on my Netgear router

First I suggest, try disconnecting ETH. I'm afraid, creating two network links for a single path is a bad idea, fuzzing up your router.
by wolf.z
Fri Nov 15, 2019 7:46 pm
Forum: Beginners
Topic: Very Basic Wiring Question
Replies: 8
Views: 437

Re: Very Basic Wiring Question

IMHO Breadboards are not for moving platforms, especially those carrying a "jam" in their name. Learn how to solder. It is tricky from the very beginning, but worth the effort. Bad contacts cause lot of trouble. Good soldering skills pay off.
by wolf.z
Fri Nov 15, 2019 7:42 pm
Forum: General discussion
Topic: GPS problems
Replies: 10
Views: 409

Re: GPS problems

OK, so a GPSD related problem might be back with latest buster. Don't call GPSD awful. GPSD is a perfect piece of software. In my case (again: years with Wheezy ago) a remove and fresh GPSD compile and install did cure the problem. At that time NTPD was implemented partially broken as well.
by wolf.z
Fri Nov 15, 2019 5:08 pm
Forum: General discussion
Topic: GPS problems
Replies: 10
Views: 409

Re: GPS problems

... I killed GPSD but it made no difference. It seems to be a permissions thing as sudo ./gps works, whereas ./gps gives the error message. I have another RasPi and ./gps works fine on that. I did a ls -l /dev/ttyACM0 on each machine and the permissions on both are crw--rw---- Brian I cannot clarif...
by wolf.z
Wed Nov 13, 2019 8:56 pm
Forum: Off topic discussion
Topic: What dictates the accuracy of a gps module? [solved]
Replies: 12
Views: 1705

Re: What dictates the accuracy of a gps module?

One hardly may describe everything that might affect accuracy. Things grow easy in your case since you already chose a device. Roughly speaking accuracy is determinde by the following: anthmosphere induced radio propagation condition device class assistant information user awareness obstacles in lin...
by wolf.z
Fri Nov 08, 2019 8:09 pm
Forum: Troubleshooting
Topic: dnsmasq
Replies: 5
Views: 153

Re: dnsmasq

Well that’s what I meant. When I tried to create a new file dnsmasq.d/ it says the file cannot write when I try to save it. Well, as epoch 1970 meant, you only may edit any file in a directory. So this was something like vi /etc/dnsmasq.d/yourwhateverfile However, editing files too much often is re...
by wolf.z
Thu Nov 07, 2019 7:57 am
Forum: General discussion
Topic: HOSTAPD ERROR
Replies: 3
Views: 472

Re: HOSTAPD ERROR

Well, it is kind of looking into a crystal ball judging what might be missing. So in short troubleshooting must follow this path: Check, whether your tablet is connected to your AP. Check, whether your tablet has got a valid IP from dnsmasq. Check, whether you may connect to your Pi, best ping, seco...
by wolf.z
Thu Nov 07, 2019 7:39 am
Forum: General discussion
Topic: How to Wire 5V and Battery
Replies: 25
Views: 1096

Re: How to Wire 5V and Battery

Pixelpop, your lecture suggests, you almost have no clue, what Volts are. Current source (battery) and sink (Pi) are like dishwasher and fitment cupboard. You'll never succeed in fitting a 60cm dishwasher to a 40cm cupboard. Back to Volts, you have to involve a power converter to fit source and sink...
by wolf.z
Sat Oct 19, 2019 4:33 pm
Forum: General discussion
Topic: Wifi only works sometimes
Replies: 4
Views: 371

Re: Wifi only works sometimes

There is a chance, your Pi's WIFI connects to another WIFI, probably an open one. Do you have a console connected to your Pi? Try sudo iwlist wlan0 scan (and wlan1 in case, you have multiple WIFI adaptors) in order to check for WIFIs SSID availability. When Pi seems not connected try iwconfig wlan0 ...
by wolf.z
Wed Oct 09, 2019 8:23 pm
Forum: Networking and servers
Topic: Sending data without wifi
Replies: 10
Views: 1071

Re: Sending data without wifi

Well, transmitting from drones, you are stuck with ISM band radio and or SRD radio. Any attempt for gaining less latency will cause you to become a radio amateur (without further discussion). That said there is an ongoing project using WIFI hardware in injection mode, targetting image broadcast. Tha...
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: 36
Views: 1595

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: [SOLVED]wlan0 doesn't get an IP Address
Replies: 7
Views: 616

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: 213

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: 488

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: 1163

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: 2464

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: 413

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: 617

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: 5301

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: 1695

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: 1695

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: 1596

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: 871

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...

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