I have this USB Relay:
http://www.ebay.com/itm/5V-USB-Relay-2-Channel-Programmable-Computer-Control-For-Smart-Home-/141097843081?pt=LH_DefaultDomain_0&hash=item20da163989
Al I need is to send close/open to the device (to turn on & off an LED light)
How can I do that using C# or C++?
Thanks
Boaz
Here's what you need (tested on Linux) :
HIDAPI from http://www.signal11.us/oss/hidapi/
USBRELAY from https://github.com/darrylb123/usbrelay/blob/master/README.md
Use it like :
usbrelay ZG4HU_1=1
usbrelay ZG4HU_1=0
to switch the first relay on and off. ZG4HU_2 addresses the second relay and without arguments you even get the relay status.
-- Hans
The 26484 26483.rar is what I needed for Windows. .exe files for graphic and for command line for testing and .dll for my own development.
Found here: http://files.elektroda.net/794975,26484++26483+usbrelayextlib.html
Related
I know there are a bunch of blogs explaining how to set up the wifi headless on the raspberry pi. I have followed them and they worked, once. But I had to format the sd card, and re-do it and it doesn't connect to the WiFi anymore.
I use the RPI Imager to write the OS. (Note I've also tried with the advanced option pressing Ctrl + Shift + 10, and set up the wifi, ssh over like this. After writing it, the verification returned an error that couldn't create a FAT32 partition).
Then I created a blank ssh file inside the sd card (boot) to allow the ssh connection.
Then I created the wpa_supplicant.conf file containing this:
country=CZ
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
network={
ssid="NETWORK-NAME"
psk="NETWORK-PASSWORD"
}
Then I eject the sd card, insert it in the raspberry pi and it doesn't connect to the wifi.
I know that the Raspberry pi, and the wifi connector work well. So it must be something that I'm misssing.
I'm honestly desperate at this point since I have spent more than 10 hours just trying to connect to the WiFi. I have formated and re-installed the Raspberri-OS a bunch of times already, and tried as many tutorials as I could find.
There's not really a single universal answer to your question, so at the risk of telling you a bunch of things you already tried, here's my exhaustive list of stuff to try/consider:
If you're using Ubuntu you probably have to use netplan - see here for some instructions https://askubuntu.com/questions/1143287/how-to-setup-of-raspberry-pi-3-onboard-wifi-for-ubuntu-server-with-netplan
Don't forget your key_mgmt field (use the value relevant to your wifi):
ctrl_interface=DIR=/var/run/wpa_supplicant GROUP=netdev
update_config=1
country=CA
network={
ssid="NETWORK_SSID"
psk="PSWD"
key_mgmt=WPA-PSK
}
If you can ssh into with a wired connection, and are using Raspian, you may find using raspi-config easier (sudo raspi-config, then System Options > S1 Wireless LAN).
Now we get into the "I already checked that five times" part of the list:
a)if you're using Ubuntu/netplan, ensure you're using the correct interface id by doing ifconfig - should be wlan0, but you never know
b)ensure you have your SSID correct - you can do sudo iw wlan0 scan to find all the networks in reach and double check the SSID. Watch out for weird quotation marks (e.g. 'smart' quotes), elongated dashes and stray spaces - in particular if you have pasted the SSID and password from elsewhere
c) ensure your SSID, password and key setting is correct by checking a different device
d) ensure you are looking for the right IP address on your LAN - you can do a sudo nmap -sn 192.168.1.0/24 and your Pi devices should show up looking like:
Nmap scan report for 192.168.1.68
Host is up (0.00044s latency).
MAC Address: B8:27:EB:8B:73:AD (Raspberry Pi Foundation)
Remember that if using DHCP, your Wifi and Wired connections will get different IP addresses - if using static for Wired, you'll also likely get a DHCP address for your wireless interface.
If you keep failing using the same Raspian image, try something different, just to isolate the problem - e.g. try Ubuntu if you keep failing with Buster (or vice versa)
Finally, some more general advice about what to do when you're just so frustrated with a problem that you've spent way too much time on - write out a 'proof' of why what you're trying to do is impossible, explaining line by line how you've done exactly the steps that are supposed to work. This is my method of last resort, and currently has a 100% success rate - when I try to explain why the thing is impossible, I realize what I didn't do, overlooked, or did wrong.
Actually, I solved this by following this blog https://weworkweplay.com/play/automatically-connect-a-raspberry-pi-to-a-wifi-network/?fbclid=IwAR2QckXB5XMPLCttnyBDUWv-MgxFsk0utfih4FHpF1za4OzH-9h-SKgR0GM and adding some stuff to the /etc/network/interfaces/
I am currently using 'connmanctl config' to set static and DHCP settings with a wired connection. I'm curious if anyone has been successful with applying settings with the wire unplugged?
I would typically use 'connmanctl services' for a list of services then perform a string.match(blah, "ethernet_%w+_cable") to use that wired service name. I have been able to find and apply that service name with the ethernet cable unplugged BUT now when using 'connmanctl config':
connmanctl config ethernet_f8dc7a04ea82_cable --ipv4 manual 192.168.91.108 255.255.255.0 192.168.91.1 --nameservers 8.8.8.8
I get this error:
Error ethernet_f8dc7a04ea82_cable: Method "SetProperty" with signature "sv" on interface "net.connman.Service" doesn't exist
As you can see I have the service applied to the command and this is the same service name as when the cable is plugged in. This feature would be nice for equipment that needs to be pre-programmed before reaching the customer. I have also researched this error but can't find it being an issue with others the same as it is with my situation. Have also read many blogs, articles, etc...on trying to achieve this with nothing that jumps out at me.
...Any ideas ?
I had to perform this action via back-end with the code that I am using to configure. Just an example...settings are applied to /var/lib/connman/ethernet_?????cable/settings. I created the adapter name with the MAC address because it does not exist until the network is detected, created the directory /ethernet?????_cable then created an empty settings file on the fly. When programming and saving the settings via the equipment I am using I just insert the settings manually. When a network cable is plugged in and detected the settings you have applied work wonderfully.
I'm trying to get asterisk 11.20.0 running with WebRTC (sip.js 0.72 which I believe is a fork of jssip), but I'm seeing the following (and the called party rings, but when the phone is answered the call gets hung up).
This is my setup:
What I see:
In the CLI:
[2015-11-24 01:01:53] NOTICE[43619][C-00000002]: res_rtp_asterisk.c:4441 ast_rtp_read: Unknown RTP codec 95 received from '(null)'
In Firefox:
InvalidSessionDescriptionError: Invalid description, no ice-ufrag attribute
Attachments:
SIP Dialogue (Asterisk CLI)
Webphone Log
Config Files (httpd.conf, sip.conf, rtp.conf)
Asterisk Compiled with Libuuid & Friends
What I've tried so far:
Changed webRTC implementations (tried chrome and firefox both with SIPML and SIP.JS)
Set the STUN server to null on the client side (stunServers: ['stun:null'])
Configured properly (I hope) my sip.conf and rtp.conf and httpd.conf
Made sure I have libuuid, uuid and their -devel companions and after i've recompiled asterisk.
What I've read:
http://forums.asterisk.org/viewtopic.php?p=201702
https://wiki.asterisk.org/wiki/display/AST/Asterisk+WebRTC+Support
https://wiki.asterisk.org/wiki/display/AST/WebRTC+tutorial+using+SIPML5
http://jssip.net/documentation/misc/interoperability/asterisk/
http://sipjs.com/guides/server-configuration/asterisk/
https://kunjans.wordpress.com/2015/01/09/web-sip-client-sipml5-with-asterisk-13-on-centos-6-6/
http://forums.digium.com/viewtopic.php?f=1&t=89798
Please, if you can, give me a hand. I'm about to smash my box with a sledge hammer.
Faced same issue and followed instruction in http://forums.digium.com/viewtopic.php?f=1&t=90167 realise that:
This issue is caused because you asterisk don't have ICE support, you can solve that by installing the uuid/libuuid and uuid-devel/libuuid-devel packages on your system. Then recompile asterisk(be sure to rerun the configure script before the make command).
I did recompile my Astersik 11.16.0 with patch for ECDH support and fallback to prime256v1 https://issues.asterisk.org/jira/browse/ASTERISK-25265 and looks like lost uuid support at that time. Reverting back to non-patched version (with uuid support, use to be compiled before) resolved my issue with "no ice-ufrag attribute" error in Firefox console and calls are going well now from WebRTC client SIPML5 based to asterisk, but not in opposit direction
I'm working on an iMX23 cpu with linux-2.6.35.3 and wondering if this is even possible to implement.
I can build g_serial and g_multi and use the serial port function, which uses /dev/ttyGS0.
Do I just have to change [console=ttyS0] to [console=ttyGS0] on the kernel command line?
Thanks
Yes, it should be that simple. Just change your kernel command line to "console=ttyGS0,115200" or similar. You'll find it even works with usb ports ie "console=ttyUSB0" for example.
It seems you can easily add another console port just by adding another setting in [/etc/inittab]
::respawn:/sbin/getty -L ttyAM0 115200 vt100
::respawn:/sbin/getty -L ttyGS0 115200 vt100
Adding another line as above will enable you to use USB serial as console too(/dev/ttyGS0).
I'm Trying to write a plugin for NotePad++ using NppScripting - a platform for writing plugins using javascript (specifically - JScript).
I was wondering if there was a way (probably via ActiveXObject) with which I could listen to a port asynchronously (specifically - I'm trying to write a CSS-X-Fire port to NPP).
I know .NET has that capability via System.Net.Sockets but I couldn't figure out a way to access it via JScript.
Any help?
If I were doing this, I would write the Socket server in .NET as a standalone EXE.
If I understand CSS-X-Fire correctly, it is a plugin to IntelliJ Idea that listens to outgoing communications from Firebug, and then updates source files appropriately. It sounds relatively simple. The .NET socket server could do this very easily.
Then, rather than expose a 2nd interface directly from the socket server to the scripting environment - like a COM object or a COPYDATA channel or something like that - I'd use the filesystem for communication. In other words, script something in NPP that polls the filesystem file for updates. When the .NET Socket server gets a message that says "Firebug just updated file X.css", the .NET Socket server can apply those updates to the filesystem file, and save changes back to the filesystem. Because the Notepad++ app polls the filesystem, it will see the updated file and reload it, picking up those saved changes. You'd need to do cursor management within N++ intelligently.
Emacs has an "auto revert mode" for this sort of thing, so the .NET CSS-X-Fire Socket server would work with emacs out of the box - no additional scripting required. Not sure if N++ has an auto-revert equivalent.
I eventually decided to use Adobe AIR to create my solution. It provides an amazing set of APIs, including a set of Socket APIs.
You can look at my solution here