New answers tagged pi-3
2
The raspberry pi would have to act as a serial device server/client in order to communicate with the Micromate through its USB serial connection. You'll need to use a Sabrent FTDI compatible serial cable and set the modem type to "generic" instead of USB to PC on the Micromate. If you're looking for advice on low cost modems or settings for your Pi that ...
0
I encountered the same problem and after not finding an easy way to stack stuff on GPIO pins, I decided to try a daisy-chain approach.
It looks like your sensor is typical in that it requires a header to be soldered on:
Often they come with headers in the bag. But you can also purchase a header with longer pins.
This one has 21mm "total height", and the ...
1
Yes, if your monitor supports HDMI CEC commands. Try installing cec-client and running
echo "standby 0" | cec-client -s
to see if it does.
1
You appear to have got confused between the pin numbering of the GPIO connections on the Pi. There are several conventions including BCM (Broadcom pin number, commonly called "GPIO") and Physical (Number corresponding to the pin's physical location on the header).
The tutorial is using the BCM numbering however you have placed your connections in the ...
1
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 ...
1
If there is any error while running this on startup, you can’t see the error message. To check this, press ctrl+alt+F1. Here you can check the output of background processes. You can return to graphical display by ctrl+alt+F7.
This is the way you can ensure whether there is any error while running the code or not.
Now come to your solution, if there is any ...
1
If you do not have any reason to switch off the access point on the RasPi then you can just configure a client connection to your home network in addition to the access point. Then everything will work "automagically". If you at home the RasPi will connect by WiFi to your home network. If you are outdoors then there is just no connection. wpa_supplicant ...
3
There are a couple.
Orca is a popular screen reader that works on the Raspberry Pi, and you can install it by typing from the terminal "sudo apt-get install gnome-orca". Here's that command pronunciated: "s u d o space a p t dash g e t space i n s t a l l space g n o m e dash o r c a"
yasr is another screen reader that works on the Raspberry Pi. ...
0
Enterprise WiFi Networking is broken on Buster. You need to revert to an earlier version of WPA_supplicant. Try searching for pi4 PEAP authentication failure to find out how to revert to stretch version of wpasupplicant
3
Follow the instruction:
1. Config the RPi as a Wifi Access point or a Wifi Hotspot
sudo apt-get -y install hostapd dnsmasq
nano /etc/hostapd/hostapd.conf
Add the config below to the hostapd.conf file:
interface=wlan0
driver=nl80211
ssid=MyPiAP
hw_mode=g
channel=6
ieee80211n=1
wmm_enabled=1
ht_capab=[HT40][SHORT-GI-20][DSSS_CCK-40]
macaddr_acl=0
...
2
That adapter's description says it supports Qualcomm's Quick Charge technology. The QC technology communicates with the device being charged and automatically selects 5, 9, or 12 volts, depending upon what the device can accept. My first thought is to return it and order a power supply rather than a charger. However, if it's connected to a "dumb" USB ...
0
In the end this issue was caused by my Virgin Media "SuperHub 3.0" router with it's dynamic wifi channel switching.
I disabled it about 11 days ago and not a blip of an issue since.
This also explains why it occurred more often when I was using my laptop upstairs in my house, something which I thought was just my imagination, but obviously an action that ...
1
If you've got access to your Pi, you can use this answer. If not, use the command line of your laptop/linux pc/mac. Some of this won't work in Windows unless you've installed cygwin or the bash shell for windows
Try this first:
$ arp -a | grep --ignore-case b8:27:eb
If you get a reply that looks like this, then there's your IP address!
? (192.168.1....
2
Open the Terminal and type
ifconfig
Output:
It will list the Ip address of LAN,Wifi etc.
2
Unsurprisingly, the bus supporting SD cards is called SD bus. There is a spec for it if you're interested. The SoC of RPi 3 implements two controllers for this bus: one is connected to the microSD slot, and the other one to the WiFi controller in SDIO mode.
The Linux driver for SD/MMC/SDIO devices is called mmc, and it does provide access to the hidden ...
3
On the Pi itself you can find the IP address with the ip addr or hostname -I commands or from the Network Manager GUI (probably).
The official documentation has some tips on how to find the IP address from elsewhere on the network but something like ping raspberrypi.local might be the easier one to try first, depending on the OS you're using on the other ...
4
If the local network is small (e.g. local IPv4 segment) or you know the exact pool of IP addresses of interest, you can find an open SSH port in seconds using nmap:
nmap -sS -p 22 192.168.10.0/24
1
I think this might be helpful. To mount the Drive and Outbox. Go through the link once.
How to mount your google drive on Raspbian RPI with GDriveFS
0
After Ingo's suggestion, for me this answers my question. In short, I don't suggest booting from usb sticks. https://raspberrypi.stackexchange.com/a/100064/68240
1
Okay, after resetting the TV to factory settings, completely reinstalling Raspbian/cec-utils, and putting a new HDMI cable in the mix, the solution ended up being embarrassingly easy: unplugging and plugging back in the TV. I didn't do that before because the power was really hard to get to and I thought a factory reset would accomplish the same thing :/
...
1
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.
0
Raspberry Pi pin 1 (3V3) is not a GPIO.
GPIO 1 (which is what your code is switching) is on pin 28.
https://pinout.xyz/
Could you clarify what you are intending?
Individual GPIO can only provide a few milliamps, say 20 milliamps.
To control LED_ON_OFF connect a Pi GPIO to pin 3 of the device. Also connect a ground wire between the Pi (say Pi pin 6) and ...
1
Sometimes the display is out due to overheating of the pi device (happened to me many times when having very long-running hours). You shall let it cool down and try again.
Also, you shall power the pi device from the electric power source and not the PC because sometimes electric fluctuation of PC's power will cause damage to the device and/or USB port of ...
0
How and where do you check for the USB? Check in /mnt for USB drives connected as there is no notification when I connect any USB to my pi. I've to check there always.
2
What you want to have is a classical failover scenario. Fortunately Linux has a professional solution for it with bonding. With it you can combine two (or more) interfaces where you can configure what should be the primary interface and switch over to the reserved interface if the primary fails and switch back if the primary is available again. This all is ...
1
If you just want to prevent your Pi from going into sleep mode you could just change lightdm which manages sleep mode.
Go into the config file:
sudo nano /etc/lightdm/lightdm.conf
and add the following line:
xserver-command=X -s 0 dpms
Edit:
I just noticed you're probably following a guide for the Raspberry Pi 4 where indeed that directory and file ...
0
You can set the hostname that the Apache webserver responds to using the ServerName directive in the Apache config file.
For example:
ServerName my-raspberry-pi:80
(on port 80)
However, unless the hostname is defined in a public DNS server (that points to your local Apache webserver), then you also need to configure the HOSTS file on each machine from ...
0
You can use
$sudo wpa_cli wps_pbc -i wlan0
0
Apparently, formatting the USB stick on windows and putting files on it on windows force something to happen.
After that linux can use the stick, for the NAS and the key is readable by both systems.
0
Ok, solved the issue by reinstalling libasound2-data and setting up Preferences > Audio Device Settings. You should click Select Controls, choose PCM, and then volume control will be enabled
1
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:
https://www.abelectronics.co.uk/kb/article/20/raspberry-pi-serial-port-usage
http://raspberrypi.tomasgreno.cz/uart-to-rs-232.html
On GPIO header of RPi you can find a so called UART pins. In fact, it ...
0
There is NO Raspbian Linux 4.19.81-v7+
You probably have Raspbian GNU/Linux 10 (buster) running kernel 4.19.81-v7+
You have probably broken your system by running rpi-update
"In normal circumstances there is NEVER a need to run rpi-update as it always gets you to the leading edge firmware and kernel and because that may be a testing version it could ...
1
One obvious reason is that raspi3 will load the kernel at the 0x80000 address, which is dedicated to the 64-bit kernel. If you load a 32-bit kernel at that address, it will fail to run because the absolute address values of all relative offsets will be wrong. The difference can be seen in "arm/raspi.c" file:
#define FIRMWARE_ADDR_2 0x8000 /* Pi 2 loads ...
1
Editing /etc/network/interfaces no longer works in Raspbian, as TSGames commented in the most upvoted answer.
Instead, you can use /sbin/iw wlan0 get power_save to read the current power save state, and sudo /sbin/iw wlan0 set power_save off to disable power state.
Since the iw command is not persistant, I added /sbin/iw wlan0 set power_save off to /etc/rc....
1
Use a variable for the increment that can be switched from +1 to -1 depending on the position.
from sense_hat import SenseHat
import time
s = SenseHat()
R = (255,0,0)
x = 0
y = 1
s.clear()
inc = 1
while True:
First = s.set_pixel(x,4,R)
Second = s.set_pixel(y,4,R)
time.sleep(0.4)
s.clear()
x = x + inc
y = y + inc
if y == 7:
inc = -1
if ...
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