Raspberry Pi Forums

dobra-dobra

Thank you for your help. I just run a bunch of tests and solved this puzzle. First of all I was trying to find a version of Raspbian Lite which will boot. When I got back to the version from 2015 without luck I was sure that this is a dead end and the problem needs to be somewhere else. Where? It tu...

dobra-dobra

I have two old (ancient?) Pi's Model A, which I use in air quality displays. Due to the issues with WiFi dongle I needed to flash new SD card with current version of Raspbian Lite. The problem is that version from 2018-11-13 does not boot on my Model A boards (ACT LED does not blink), while it does ...

dobra-dobra

I confirm that workaround presented by @SR-71 worked for both RPi 3 connected with built-in WiFi and RPi A+ with official WiFi dongle. Yay!

Thank you all for help with this issue.

dobra-dobra

It's not a hardware issue. I have two official RPi dongles with Broadcom chips and RPi 3. All of them do not sync time (but there is internet connection, I can ssh to them, make update or ping Google), while when I switch to other dongle in the same setup time is set just after boot. Moreover, in ol...

dobra-dobra

But how it is possible that it works for one dongle, and does not work for other? Setup is exactly the same.

dobra-dobra

I left Pi 2 with official dongle (Broadcom chip) on for 5 hours and time is still incorrect. @DougieLawson I tried these commands already. I have a freeze after sudo ntpd -qg when using official dongle. Waited about 10 minutes to complete without any luck. When I switched to dongle with Realtek chip...

dobra-dobra

Here are the outputs: http://pastebin.com/Ys1GWWrm , I can't see any differences. I tried new option in raspi-config to wait for network during boot but issue still occurs. I also tried to restart NTP server using /etc/init.d/ntp restart without any luck. Edit Here is output of /etc/init.d/ntp statu...

dobra-dobra

Thank you for your response. My AP runs on channel 6. Output from ip route and cat /etc/resolv.conf is exactly the same no matter what dongle I use and I receive ping responses (except ping -c3 (ip route | awk '/default/ {print $3}') which does not work - syntax error near unexpected token `(', but ...

dobra-dobra

I'm running Raspbian Jessie with all recent updates. When using Pi 2 or 3 time/date is not synchronizing at boot. When I placed the same SD card in Pi Zero time was updated correctly. What may be the problem? Edit Problem only occurs when using official WiFi dongle (no matter what Pi) or on Pi 3 whe...

dobra-dobra

I can recommend the following two dongles: 1) http://www.ebay.com/itm/WiFi-300Mbps-USB-Adapter-802-11n-g-b-Wireless-Dongle-Antenna-LAN-Network-EDUP-/381550123168?hash=item58d628d8a0:g:InAAAOSweW5VY8tW 2) http://www.ebay.com/itm/Protronix-Mini-USB-WiFi-Network-Card-Wireless-LAN-Adapter-Dongle-802-11n...

dobra-dobra

Hi Rabus

Have you got any luck with this issue? I just started a similar topic on forum (viewtopic.php?f=28&t=137349) as I can't get Broadcom dongle to work on Jessie Lite, while other dongles work fine.

dobra-dobra

I have a RPi model A running headless Raspbian Jessie Lite with recent actualizations. I configured WiFi by adding following lines to /etc/wpa_supplicant/wpa_supplicant.conf file: network={ ssid="testing" psk="testingPassword" } All my cheap, Chinese WiFi dongles can connect to my network, but that ...

dobra-dobra

I just love to solve such problems. Here you are:

http://letmegooglethat.com/?q=raspberry ... processing

dobra-dobra

Glad you were able to sort it out. I thought that you are trying to use Rx/Tx pins on GPIO to connect, not USB port. But USB port is safer option due to the voltage difference (5 V Arduino vs. 3.3 V RPi).

dobra-dobra

alexeames wrote:Shouldn't it be AMA0?

Yes, it should.

Code: Select all

test = serial.Serial()
test.baudrate = 9600
test.timeout = 0
test.port = "/dev/ttyAMA0"

Before sending message you should open the port:

Code: Select all

test.open()

Then if you are using Python 2:

Code: Select all

test.write("3")

But for Python 3 it will be:

Code: Select all

test.write("3".encode()

dobra-dobra

I'm not that an expert in heat transmission, but i think that in this case the only solution for reading right values of temperature is to keep the sensor (and so the sense hat) far from the pi cpu...not meters but some centimeter would be enough. You can still have some heat from LED matrix if in ...

dobra-dobra

There actually is an early life project that allows one to use the Arduino IDE editor and run existing Arduino sketches on a Pi ... see: https://github.com/me-no-dev/RasPiArduino Wow! That is really cool! Thank your for the tip. It seems that it's quite active project, too. Good find. I need to try...

dobra-dobra

It's a bit of oversimplification, but: - if you plan to connect your Pi to TV and use it as a regular computer pick a RPi 2 B; - if you plan to build a robot or similar device pick a RPi Zero. Overall if you just want to check what Pi is all about you can't go wrong with RPi 2 B, while Zero will hav...

dobra-dobra

First of all you are doing quite ambitious project, so do not expect that everything will be easy. It's not all about combining Lego bricks after all. You spend few hours learning. You have improved your searching skills for sure. Next time you can make a post on forum about your problem and let peo...

dobra-dobra

Thanks, that solved my issue. But still I will need some more time to rethink why it doesn't work my way, thanks for the clue tho.

dobra-dobra

Hi I have a problem with returning temperature value from inside a function. I'm reading it from DS18B20 sensor and setup was done using this tutorial: http://www.cl.cam.ac.uk/projects/raspberrypi/tutorials/temperature/ Here is my code: #!/usr/bin/python3 # import libraries import time import subpro...

dobra-dobra

I'm spending my free time tinkering with GertDuino, which I have bought this week. I had an idea to use Ino (http://inotool.org/) to build .hex files for ATmega328 and 48 from command line, which I will then upload using avrdude (I have modified Gert's program_328 and program_48 scripts for this pur...

dobra-dobra

I can confirm, that when camera is connected vcgencmd get_camera does not return what expected. I made updates of system lately (apt-get update, rpi-update), but I'm not sure if this is related. After some tinkering (disconnecting and connecting module, disabling and enabling camera in raspi-config)...

dobra-dobra

That is exactly what I needed, thanks a lot.

dobra-dobra

Thanks for response. I use Python code to call raspistill in a loop, and so errors which I get (I don't remember them now) are from raspistill, not from Python. So if I understand correctly I can't use Python exceptions. But sometimes when you ask a question it is easier to find a solution by yourse...

Search found 34 matches

Re: Pi 1 Model A not booting Raspbian Lite 2018-11-13

[Solved] Pi 1 Model A not booting Raspbian Lite 2018-11-13

Re: Time does not sync on Pi 3 or when official dongle is us

Re: Time does not sync on Pi 3 or when official dongle is us

Re: Time does not sync on Pi 3 or when official dongle is us

Re: Time does not sync on Pi 3 or when official dongle is us

Re: Time does not sync on Pi 3 or when official dongle is us

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Time does not sync on Pi 3 and with official dongle [Solved]

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Re: Python code to detect if camera is available

Re: Python code to detect if camera is available