I am trying to connect my NFC reader using nfcpy.
All installations went successful, but it seems to not be able to find my NFC reader.
This is the message I get:
"
This is the 1.0.3 version of nfcpy run in Python 3.8.1
on Windows-10-10.0.17134-SP0
I'm now searching your system for contactless devices
DEBUG:nfc.clf.transport:using libusb-1.0.22
DEBUG:nfc.clf.transport:path matches '^(usb|)$'
I'm not trying serial devices because you haven't told me
-- add the option '--search-tty' to have me looking
-- but beware that this may break other serial devs
Sorry, but I couldn't find any contactless device
"
Does anyone know what is going wrong?
Related
Hello fellow community,
I'm currently trying to differentiate between multiple HID input sources connected to a RDP client running Windows 10 Business build 19045.2251. The server itself is a Microsoft Windows Server 2019 build 17763 running a custom C# 4.7 .NET application.
The application shall then differentiate betweeen a barcode reader, an RFID reader and a keyboard respectively.
My naive idea is to only allow inputs coming from the barcode reader and only when an authorized person gives permission by means of his/her RFID chip, keyboard inputs are permitted.
Running the application locally for testing purposes allowed to perform the distinction using the vendor and product ID of a given input device using raw inputs.
Unfortunately, this breaks once I move the application onto the server and try obtaining raw inputs from the device connected to the client, as shown below:
raw information of USB device connected to client
So far I tried activating remoteFx in the hope of gettig device specific information, but to no avail.
I could not find any helpful resources on the internet and thus I am turning to you, hoping anybody could provide me with some hints on how to go on.
Also if this approach is flawed to begin with, I am happy to adapt the logic in order for it to work.
Thanks in advance for any input!
I'm trying to understand if (and if so, how) it's possible to dedicate a HID (USB-card reader for NFC cards) to a specific application in macOS.
The card reader acts as a keyboard, sending the number of the card to whatever is open in macOS. I'm trying to get that USB-device locked to a specific application (e.g. firefox, chrome etc).
I really have no idea where to start looking for this. Hence I'm posting here for any help in the right direction.
Googling "Dedicate USB device to app" etc gave nothing useful.
macOS version 10.14.5 (18F132) (Mojave).
The way applications communicate to USB devices is IOKit framework. You could write it as service if you want to lock applications anywhere. And you need to know about launchd (Launch Daemon). It manages all your background service.
I'm trying to get data back from a magstripe reader and an rfid reader that are plugged into the raspberry pi and communicate via serial. I can connect to the readers but when I try to read from them I don't get anything.
Was wondering if the driver even works on the newer iot OS versions.
So I used the code located from this link! in conjunction with the driver install steps from the tutorial Rita shared and I was able to get the Serial Device's, open them and and start reading data.
I'm new with NodeMCU firmware use. I have a Amica ESP-12E (v2?) dev kit connected to a DHT22 which I program using the Arduino IDE. All is setup and working fine.
My problem came when I wanted to update NodeMCU firmware. Since I don't really know what came pre installed from China, I downloaded ESPlorer to try to determine NodeMCU version. I get the following "error" when I reset the dev board:
Communication with MCU..Got answer! Communication with MCU established.
AutoDetect firmware...
Can't autodetect firmware, because proper answer not received (may be unknown firmware).
Please, reset module or continue.
{{a long string of weird characters that I can't copy and paste appear here}}
At this point I'm totally clueless about what version of firmware I have. Is there a way to obtain NodeMCU firmware version by software via Arduino IDE code, ESPlorer GUI or something similar?
On the other hand, is there a really easy way to compile/download latest NodeMCU firmware BIN file? Even one with all the modules active will be fine for me now, I'm just trying to understand and test things.
You seem to be confusing two very different platforms. I leave out some details as not to confuse you any further.
Arduino: you use Arduino programming in the Arduino IDE then build and install a binary to your device whenever the application changes. No NodeMCU firmware needed!
NodeMCU: you flash the NodeMCU firmware once (e.g. using esptool.py) and then upload Lua code (e.g. using ESPlorer) whenever the application changes. This is more lightweight than the Arduino platform.
On the other hand, is there a really easy way to compile/download
latest NodeMCU firmware BIN file?
Yes, have a look at the NodeMCU documentation at http://nodemcu.readthedocs.io/en/latest/en/build/. The easiest is to use the cloud builder at https://nodemcu-build.com/. I currently suggest to build from the dev branch because flashing is easier with it.
As pointed out you have several options for firmware and you'll need to make a choice as to which suits you going forward. If you are going to stick with the Nodemcu LUA firmware you can determine the version by typing:
print(node.info())
at the command line prompt.
There are alternatives to using ESPlorer e.g. Putty or Coolterm that will give you the raw output from the device with no interpretation. So if you have the correct serial port settings and the device plugged into the USB port it will show the banner when you reset giving an indication of the origin and version of the installed firmware.
In ESPlorer, there is an option under settings which if unchecked will stop looking checking for the version of the code.
For whatever reason, ESPlorer is not designed to read nodemcu version.
The error message throws you off, could lead you to think, there is an error.
At best, the above error can be ignored. It has no impact at all. In background, init.lua is up and running.
I have a Metrologic MS1690 Barcode scanner that I'm trying to use with Windows 8.1, I get a Unrecognized Device: Device descriptor request failed error in devices and printers. The scanner gets no power from the computer when it is plugged in because of this. It usually shows up as a usb keyboard in windows 8 and 7, but with 8.1 it does not and I can't find an answer anywhere. Please help! Or even if someone could tell me how to get a generic usb keyboard driver for this thing that may help as well. Thanks.
The scanner gets no power from the computer when it is plugged in
Bit of a guess, but there was a change in Win8.1 that can affect HID devices like this. Such devices are now suspended when no application or service is accessing it. This can cause the device to misbehave if it depends on receiving timely power to operate correctly.
The workaround is to disable Enhanced Power Management for the device. The instructions are pretty elaborately spelled-out in this blog post. At break-neck speed: use Regedit.exe, locate the device in the HKEY_LOCAL_MACHINE\ SYSTEM\ CurrentControlSet\ Enum\ USB key and set the EnhancedPowerManagementEnabled value to 0.
The "solution" for me has been to add a PCI-E USB card, and use that for the scanner. I went with this one from Rosewill because it uses an NEC chipset which I have heard good things about.
After installing the provided drivers for the PCI-E card, the scanner seems to enumerate consistently (I have only been able to test it for a couple days so far).
According to the person I bought my scanner from, it's an issue with the USB chipset on the motherboard. Some are compatible and some aren't. If I had to do it over again, I would go with an RS232 cable and a power adapter instead of USB. I haven't tested that setup, but if your app needs serial data like mine does, it should be more reliable given that it's not dependent on the vagaries of integrated USB chipsets.