I want to collect the whole log file of the openwrt in raspberry pi-3 system,as it will be available in /var/log/syslog in normal system.Please help me to collect the whole syslog of the raspberry pi-3 openwrt OS.
uci default using the logread to get the log. You can see more detail in openwrt webside.
https://openwrt.org/docs/guide-user/base-system/log.essentials
using dmesg command to collect kernel log
Related
I created an image for raspberry pi zero 2 w using buildroot,
Also added overlay gpio-ir in config.txt but not able to receive ir signal.
No logs are printed for gpio in dmesg.
No devices are showing in /proc/bus/input/devices
Can anyone help?
I found solution my self.
Actually buildroot is not start gpio-ir-recv module at boot time.
So we need to load module manually at boot time.
We can load module by this command
modprobe gpio-ir-recv
So i have created one service to load module in /etc/init.d
I am trying to retrieive heart-rate date from a polar belt to use as part of emotion recognition algorithm. I am using a Raspberry pi 3b with raspbian. I am able to connect to the device with bluetoothctl When I open info I get a list of the UUID´s
Here is where it stops. I have tried to use hcitool according to the example below, but that does not work. When I try to connect I get the message: Connection Refused(111)
$ sudo gatttool -i hci1 -b 00:22:D0:33:1E:0F -I
[ ][00:22:D0:33:1E:0F][LE]> connect
[CON][00:22:D0:33:1E:0F][LE]>
So I tried to use bleak and pygatt and I´m not able to make this work. I am quite a newbee, so I am probably doing something wrong. But now I have run out of ideas. Any suggestions will be appreciated.
hciattach, hciconfig, hcitool, hcidump, rfcomm, sdptool, ciptool, and gatttool were deprecated by the BlueZ project in 2017. If you are following a tutorial that uses them, there is a chance that it might be out of date.
For testing it is best to use the bluetoothctl tool.
You say that you have successfully connected and get a list of UUIDs. Was 00002A37-0000-1000-8000-00805F9B34FB one of them?
If it is then select that inside bluetoothctl e.g.
gatt.select-attribute 00002a37-0000-1000-8000-00805f9b34fb
If that is succussful then you should be able to read the value with:
gatt.read
Or to test notifications:
gatt.notify on
This should start data being displayed from the belt.
gatt.notify off will stop the data being sent.
If you have this working with bluetoothctl then reproducing it with Python should be done with confidence that the RPi and belt are able to connect successfully.
There is an example of building a BLE client with Python at:
https://stackoverflow.com/a/63751113/7721752
I noticed in your gatttool example you are using hci1 rather than the more typical value of hci0. This is normally the case if you have added a USB BLE dongle. I the above example you would have to change ADAPTER_PATH = '/org/bluez/hci0' to end with hci1.
There is also the example with Bleak at:
https://stackoverflow.com/a/72541361/7721752
For bleak to select an alternative adapter would add the adapter address to the BleakClient e.g.:
async with BleakClient(address, adapter="yy:yy:yy:yy:yy:yy") as client:
I installed this module and have the corresponding RaspberryPi HAT(Waveshare Rpi 35A) attached to my Raspberry Pi.
After running modprobe ili9486 in the terminal:
In /sys/module, I see the device.
In /dev/ and /dev/spi/, I don't see anything with ili9486 in it's name.
How do I send a command to the device?
In specific how do I send the command to ili9486_probe, which will in turn, send the command to waveshare_command? My goal is to get the command to reach waveshare_command?
I didn't install the dtoverlay on the Waveshare github because I do not want touch screen features. I just want to write to the screen.
I built a certain driver as module (m) for Linux, the spi-imx by NXP. Nontheless, Linux probes this driver when booting. I'm struggling to find out what process/other module/driver requests this spi-imx driver. A depmod does not show any dependencies between the spi-imx an other modules (except for the spidev as submodule).
After some research, I found out that Linux automatically (?) calls modprobe when it detects a new device. So does Linux actually call modprobe because the ecSPI'S status in the device tree as "okay"? If so, how can I prevent this? I would like to dynamically load the spi-imx from a user space application via modprobe. The story behind it: a coprocessor uses this SPI line in parallel to the Linux boot process. This interferes of course and interrupts the coprocessor's use of the SPI line. When the coprocessor has finished its transfer via SPI (a boot mechanism as well), it should hand over the SPI line to Linux.
I'm very thankful for any kind of tips, links, hints and comments on this.
Thanks a lot for the answers. As you guys mentioned, I also found out that Linux itself probes the device if present ("okay").
One possible solution is to complete cut off the modprobe call via an entry like "install spi-imx /bin/false" in the *.conf file. But that makes it impossible to load the driver via modprobe, for Linux and for user space.
"blacklist spi-imx" inside a *.conf located at /etc/modprobe.d/ is the way to prevent Linux from probing the driver when booting. After that, a modprobe from user space can successfully load the driver afterwards.
Thanks again & best regards
I'm no Linux expert unfortunately but hoping someone out there can help. I have a Raspberry Pi running Jessie with a screen HAT attached. This shows the console after boot sitting there at the logon prompt and I can log in and run node-red, which then shows node-red console data streaming by. I want to set it up so that it gets to that state after starting up with no user input i.e. no login required.
node-red is sending data to the console via debug nodes and it's that data I want to display after power up with no user intervention.
I'd imagine I have to set it to login automatically to the user that node-red is running under (pi) but I have followed instructions to do that and the screen basically doesn't actually log in.
Thank you!
use these -
For version 0.12.5 of Node-RED and later:
sudo systemctl enable nodered.service
For version 0.12.1 of Node-RED - SD card Jessie Nov 2015:
sudo update-rc.d nodered defaults
just copy/paste the suitable command for your system.
hope it helps !