I have configured both NRF52840 & SILICON LABS as RADIO COPROCESSOR and with Rpi as Border router. I'm trying to detect them by insert IP-4 address in Thread test Harness. For this approach I have the following result : No Valid THCI Found or Device already in testbed.
Do you have any idea what will be reason for this unsuccessful identification ? Or how can i fix this issue ?
Thanks in advance.
Best,
Celia,
Related
I have already posted this question on the raspberry forum but I only got a few answers that didn't solve my problem... I have been waiting for a month so I turn to this forum hoping to be able to find a solution there...
PS : do not hesitate to check my post on RPI forum to see my progress and my research/tests carried out (https://forums.raspberrypi.com/viewtopic.php?t=335338)
So here is my problem :
I have been looking for a while how to write to an external microSD card in SPI mode...
My goal is to write data collected by a sensor an store them on various microSD cards (6) by using CS. But at this point, I'm tring to write data on one card.
I'm using a RPI Zero 2W, a simple microSD card module and an 512GB microSD card (with exFAT filesystem).
I saw that there was a "mmc_spi" driver included in a linux kernel which allows to detect an SD card connected by SPI as if it were a USB key to which we could simply access/read/write (https://ralimtek.com/posts/2016/2016-12-10-raspberry_pi_secondary_sd_card/)
the problem is that this tutorial is not working anymore... In fact, the linux Kernel used in the tuto is an old one compare to the current version and and I had confirmation that the "mmc_spi" driver used to detect the SD card had evolved but the use of this new version is not documented and obviously does not work like the old one...
So my question is : does the mmc_spi driver still allows to detect SD cards and access them and if yes, does it works with the PI zero 2W ?
I am using a STM32F030F4P6 MCU and a LCD 2004 with PCF8574T I2C display driver. I have tried the library from this tutorial: https://controllerstech.com/interface-lcd-16x2-with-stm32-without-i2c/. I have found a datasheet for the PCF8574T device, but there are no commands specified in there. I am quite new in the field, but I already communicated with other devices over I2C and SPI and got them to work. Can somebody tell me what I am doing wrong, or at least show me where to get a datasheet with commands for the device? I am sorry in advance if this is a noob question.
As already mentioned, PCF8574T - is an i2c expander. So you need to write a driver which manipulates data pins on PCF8574T in way described in tutorial you found.
Check the arduino code for this type of LCD. It may save your time/ https://github.com/fdebrabander/Arduino-LiquidCrystal-I2C-library
If you have an Arduino board, you can test your LCD according this tutorial https://create.arduino.cc/projecthub/Arnov_Sharma_makes/lcd-i2c-tutorial-664e5a
Nice to know that your device still alive before debug the code.
The development board is STM32F4DISCOVERY, which includes an ST-LINK embedded debug tool. Recently, my computer cannot identify the ST-LINK on it. The Device Manager shows that 'Unknown USB Deviceļ¼Device Descniptor Request Failed)' with a yellow '!'.Besides, the LD1(LED) on the board change between Red and Green every 5s. Below is the SCH of the ST-LINK.
ps: I've already re-install the device driver, changed the micro-USB cable and even tried on another computer. Still not work.
I had similar behavior when I shorted-circuit on 5V (of course accidentally). Please check voltage on D1, on both sides must be 5V.
Also, if the voltage is OK, I would recommend testing board on another PC.
Recently I have installed fluxion on my Pi 2. There wasn't any problem in the installation process, but when I tried to use fluxion, (after choosing the language) I got the message no wireless cards found ....
It is strange because I was able to see wlan0 (and also connect to the internet) before I had selected language. And also the light on my Wi-Fi dongle goes off.
Is there any solution to fix this problem?
Finally, I could solve the problem. I bought a new wireless usb adapter. For those who are curious I will introduce model of the device. I purchased TP-Link TL-WN722N which is suitable for hacking tools in raspberry pi. It also supports monitor mode. For more information you can visit the official website.
I have a raspberry pi with 2 wireless adapters connected to it - one has an antenna.
http://www.modmypi.com/raspberry-pi/accessories/wifi-dongles/wifi-dongle-ultra-long-range-high-gain-w-5dbi-antenna
I am trying to write a script that queries my linux box for wireless interfaces, finds out which one is the one which has the antenna connected and put it into hotspot mode. Tomorrow, it can be any other adapter with an antenna attached.
Are there any tools or commands that can help?
Any entries in /proc or /sys that tell me this is the required device?
Thanks in advance.
EDIT:
Is there a CLI that gives the interface name and the Manufacturer and model?
To know what wifi cards you have plugged in your system, run "iwconfig".
For the antenna, there is no way to know if your dongle has the antenna plugged on, or the antenna has been removed.
I guess, the best workaround could be, query the device for a network scan - then you count how many APs were found: if the antenna has been unplugged, you will not get any APs (or maybe only 1-2...)
I ended up using hwinfo on my pi and doing the text/regex parsing in python to get all the data I was interested in.