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5

What happened to Raspberry Pi 2- and 3- Model A? Basically they never got arround to making them. Is there a major distinguishable difference between A and B models independent of the generation? The "B" models have the USB hub with Ethernet chip while the "A" models do not. Therefore A models only have a single USB port and no Ethernet port. A models ...


4

From a shell window, type cat /proc/device-tree/model. For example: $ cat /proc/device-tree/model Raspberry Pi 3 Model B Rev 1.2


4

Unfortunately this is normal. The original Raspberry Pi Model A and B used a linear voltage regulator to step down from 5V to all the lower voltages it requires for its operation. Its advantage is that it has a pretty smooth and steady output voltage. But the down side is that the excess voltage is literally being burned. (e.g. a 3.3V linear voltage ...


4

I would try to change the domain to .lan. This is possibly an issue with mDNS (Avahi, Bonjour, etc) that use the .local domain. It could be that Windows tries to resolve the .local domain using mDNS. The other possibility is that the responses are rejected due to lack of DNSSec. Try to use nslookup router.local and nslookup router.local 192.168.2.10 on ...


4

If you are open to use another modern all-in-one networking environment without needing additional helpers like hostapd, dnsmasq or bridge utils you can use systemd-networkd. It makes life easier. It is part of the default Raspbian image and you only have to enable and configure it. Here is a tested and working setup for what you want to do: Configuring ...


3

Turns out it was some sort of OS glitch or incompatibility. I ran the following commands overnight and it fixed the problem sudo umount /dev/sda1 # /dev/sda1 is the name of my external drive partition sudo fsck -Cy /dev/sda1


3

The Foundation's documentation make it sound that adduser should be present on a recent Raspbian: Create a new user You can create additional users on your Raspbian installation with the adduser command. Enter sudo adduser bob and you'll be prompted for a password for the new user bob. Leave this blank if you don't want a password. If it is ...


3

Make sure your device has file system over entire sd card with raspi-config command. Also, try commands such as sudo apt-get autoremove and sudo apt-get clean in order to remove unnecessary dependencies and cache. Also, if you're using 8 GB card I'd suggest using Lite version of Raspbian, since this is a very small ammount.


3

You need an OS image that came out after the release of the product, or you can upgrade the SD card in your Pi 2 and that should do the trick, provided the OS version (e.g. Stretch) came out since the 3B+. Raspbian Buster came out recently so you probably just want to use that, knowing that it supports all models. The answer to the question "What are the ...


3

To troubleshoot your problem run systemctl status ssh. You can see from the output if the ssh server is running and enabled and also see the most recent lines from the log. journalctl -e -u ssh.service could also be helpful to find the issue. It will show everything logged regarding the specified unit. As we clarified in the comments you found following ...


3

The official design specification for a Raspberry Pi HAT hasn't changed since 2014 when the current form-factor was launched with the RPiB+. There's no hardware reason why a HAT for a RPi2B won't run on a RPi4B. The thing that may need to change is the software driver as 32-bit Buster is a bit different to Jessie. The RPF/RP(T)Ltd. folks have just launched ...


3

Relative to where you started, here are some issues that I think were part of your problem (and have been written into your updated question now): The router was providing multiple DNS servers. Although your internal server was listed first, this is not a binding order of search on the router. See, e.g., https://superuser.com/questions/1177175/change-dns-...


3

I'm curious what you might be encountering, because I have installed the latest versions of Raspbian on my oldest RPi devices and I haven't experienced any issues. Supported Python Versions can be found here: Python Wiki


2

To work with any X server (I'm using the stretch version), Edit the /usr/bin/startx file and change the defaultserverargs line to: defaultserverargs="-nocursor"


2

The number of relays is an open ended question.You can have as many relays as your configuration allows you to have. If you are using expansion boards that is your limit. If you are using SPI controlled relays then probably the max amount the SPI addressing allows you to have. You can connect two Pi's together but you will need to write software to control ...


2

Matplotlib in the configuration as shown in your code tries to output its graph to the screen. That fails horribly since Jessie lite comes without the X server. No GUI, no Matplotlib rendering output. ... saving plot locally If you're not interrested in directly showing the graph via Matplotlib but want to save that plot to a file instead one can use ...


2

This should be a top level choice in the main menu of menuconfig: [ ] Enable loadable module support You want to select that, then there is a submenu; the defaults there are probably fine particularly if you are just building a module and not the whole kernel. Be warned though, if the source version you are using doesn't match the kernel you want to load ...


2

Strange I2C behaviour ... sorry for the title, I don't know how to describe further Well, in the last couple of months playing with a couple of I2C devices, I have been in the same trouble as yours. First,a more specific title could be "A Intermittently Unreliable I2C Device Address Detection Problem". Accidentally from then I got strange results ...


2

Sorry about digging up an old thread, but I came across it while looking for ideas on setting up my own ILI9488 on a Pi, and I've got a solid hunch on this problem. I have not tried this, but have seen this issue with other display controllers (ILI9341). There is an BGR/RGB parameter which sets the colour order. It looks like you have a blue/red swap issue (...


2

Its because you are calling GPIO.cleanup() in your while loop: while(1): forward(3) # reverse(3) GPIO.cleanup() Comment out the cleanup: while(1): forward(3) # reverse(3) #GPIO.cleanup()


2

The easiest way is to pull out the sd card from the device an rewrite ist using the instruction from https://www.raspberrypi.org/documentation/installation/installing-images/README.md


2

Buy a new SDCard that's 16GB or 32GB and never worry about available space again. Also ditch NOOBS, it wastes 1.3GB of space to keep the recovery system you'll never use. If you need NOOBS use NOOBS Lite or PINN.


2

The most likely explanation is the boot files need updating. You should be able to this on the Pi2 by doing a (sudo) apt update and apt upgrade. If that doesn't work you might have to do a sudo rpi-update with the SD card in the Pi2.


2

It depends on what you mean. The on-board PWM peripheral is used to provide audio to the 3.5 mm audio jack. See schematics. GPIO 12/13/18/19 can be configured to mirror the PWM output channels, but they are not connected to the audio jack.


2

The analog audio output is indeed connected to GPIO pins, but not those on the expansion header. The SoC has 54 general-purpose I/O (GPIO) lines split into two banks, but only a subset of one bank are brought out to the expansion header. Many of the others are used for dedicated purposes e.g sdio interface to the SD card and analog audio. The analog audio ...


2

I'm not familiar with PiHole and DD-WRT router so I cannot say much about your specific setup. But as I see the last problem is only that the local DNS name resolver does not append the default domain to a generic host name. So lets have a step by step look at this issue. To configure the local name resolver there is /etc/resolv.conf used. With only local ...


2

This is a summary of the communication with Igor Shalyminov. It might be helpful for persons who will find themselves in a similar situation. ;TLDR Finally he solved the problem by resetting the router to its factory settings. The reason why it didn't work is still unclear. Igors first observations were pings work as they should; and even name resolution ...


2

You are asking something like "I have a door with a lock but no key". Breaking the lock (using an exploit) I don't see as valid solution. I see mainly two solutions: purchase your own controllable router with internet access or use a reverse tunnel. For direct connecting to the RasPi you need port forwarding. This can be done with your own router you can ...


2

On the first RPi : In a first terminal : (create FIFO) mkfifo /tmp/audio.fifo.pi1 In a second terminal : (Write datas into FIFO) arecord /tmp/audio.fifo.pi1 readfifo-writeUART.py : pyserial short-intro #!/usr/bin/python # readfifo-writeUART.py import serial def do_work(data): with serial.Serial() as ser: ser.baudrate = 19200 ser....


2

You don't need to configure the static IP address for wlan0. By default, the Android Hotspot Tools has a DHCP server that answers the DHCP IP request of Raspberry Pi wlan0 and then it gives an IP randomly. If you are concerned about how to connect to raspberry pi without knowing the IP address, the answer is the hostname. Install NetX Network Tools on ...


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