If you can afford the space always go for the CD quality. It otherwise has very poor quality on the RPI. I've tried many USB microphones of varying quality including Blue Snowball and all have this background static sound to some degree unless you use record at CD quality as shown in the Greenonline,FishFace post:
arecord -D sysdefault:CARD=1 -d 10 -f ...
I managed to find the issue;
It seems I had a specific service enabled on my pi that was messing with the serial output, namely getty@ttyGS0.service This service is indeed intended to provide console over serial.
I fixed the issue by simply disabling and stopping it
sudo systemctl disable getty@ttyGS0.service
sudo systemctl stop getty@ttyGS0.service
UART is an odd choice for connecting two computers. It's definitely possible to use it with a bit of programming, but don't expect there to be many pre-existing options in terms of software.
If you use any kind of network as a connections, there are many tools which allow you to forward keystrokes over the network, starting with USBIP (which forwards data ...
I believe that there are some limitations in the main USB camera driver uvc, or your CPU/GPU's processing power for that matter, where running multiple uncompressed camera streams will just ... hang. see
So, since OpenCV uses uvc to read the USB camera stream in Linux and that cv2.VideoCapture might default to some uncompressed stream like YUYV, we need to ...
You could always just plug the pi into the USB-C port and SSH in that way.
The USB-C can be used to turn the Pi4 into an ethernet device, I've written up instructions on how to set it up here:
This answers only one part of your question. For debugging on a serial terminal session you need an USB to serial adapter cable as shown at USB to TTL to UART RS232 COM Cable module Converter. This is very inexpensive but they have very long delivery times from China. You can find also adapters from Adafruit but much more expensive.
You can also use a ...
It is known that the Raspberry Pi 3B had problems that the Foundation tried to fix but could still make problems. You can try to use Special bootcode.bin-only boot mode or extend the time for which it waits for the mass storage device to initialize. Look at Raspberry Pi boot modes how to do it and for further information about troubleshooting.
I was able to narrow this down to a Kernel issue. I do think there is something that has been updated that is causing the problem since the 7/10 release...
If you look at a list (lsmod) of your Kernal modules you see one called uncvideo - this is the problem item. Start by removing it:
pi@raspberrypi:~ $ sudo rmmod uvcvideo
Then you can read the module ...
You probably have a corrupted /etc/fstab file, so the mount failed and the data was written on the SD card. To correct the problem execute the following steps.
Replace the content of /etc/fstab with the following, using the UUIDs you get from blkid
proc /proc proc defaults 0 0
PARTUUID=6c586e13-01 /boot ...
For Android phones, you can install adb on your RPi and run
adb shell dumpsys iphonesubinfo
This will return a data block containing the IMEI (international mobile equipment identity) number of your device. This is guaranteed to be unique for legitimately produced phones.
There are scripts you can use to extract the IMEI value from the Android info block.
It seems you are missing the critical part of converting RS232 signal (which is not 3.3 V) to RPI GPIO compatible 3.3V Signal as described in this example:
On GPIO header of RPi you can find a so called UART pins. In fact, it ...
Find out the bus number and the device number of each dongle using lsusb:
Bus 001 Device 001: ID 1d6b:0002 Linux Foundation 2.0 root hub
Bus 001 Device 002: ID 0409:005a NEC Corp. HighSpeed Hub
Bus 001 Device 003: ID 7392:7811 Wireless Adapter [Realtek RTL8188CUS]
Then schedule a cron job enabling and disabling the dongles with
# turn off bus 1 ...
g_mass_storage provides low-level (cluster/block) access to a partition, which can only be exclusive. Having the same container mounted locally and accessed via mass storage at the same time will not only miss any filesystem changes, but can actually lead to filesystem corruption.
What you should use is one of the protocols which work on filesystem level, ...
You receive the message below, trying to enter in your Raspberry with ssh:
Permission denied (publickey)
because in your Raspberry the configuration file
contains the option:
and there is a mismatch between your new private key in the Mac (generated with ssh-keygen) and the corresponding old public key ...
macOS caches public keys keys in .ssh/known_hosts and normally warns if there is a conflict.
If this is your problem (and you haven't adequately explained what you did or what error you see) it can be fixed by deleting the offending key (or the whole file). There are many ssh settings on the Mac which determine how ssh connects.
I know this is old but for anyone else looking:
I have the same issues. Odd thing is, this drive is recognized on my RPi3 but not on my RPi4. As it turns out, I have two of these HDDs. The second is recognized by both so this may be a hardware issue related to some batches of these drives.
Related, you can increase power sent to USB ports by updating ...
The USB port is NOT available on the 40-ping connector!
If a USB serial is enought for debugging then you could add a USB-Serial chip like CP210x, CH340/CH341 or equal to the UART RX/TX pins, then you will get a USB serial on your HAT.
I have the SIM800 GSM addon hat for a Raspberry Pi 3 and got it to work with T-Mobile
Using this website as a reference:
I followed these steps:
sudo apt-get update
sudo apt-get install ppp screen elinks
Add the following to the file
#t-mobile is the apn