I have an arduino uno and ethernet shield and have a code written to access it over my network and click on ON or OFF and it will turn the pin on or off. I want to be able to make a schedule and a more aesthetically pleasing page to do it, so I am trying to make a webpage that has a scheduling function in order for me to set a date and time and then for the page to click the ON button, on the page hosted by my arduino board.
Any ideas?
It sounds like you're looking for a way to schedule tasks on the arduino, similar to the way cron is used in Linux for scheduling tasks.
There are a few cron implementations for arduino, such as this one
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I need to create a very simple program, that should run on raspberry pi without network connection. The program should first show one full-screen bitmap ("insert disk"), and after receiving somehow an external signal (disk inserted), another bitmap which would ask to input password. After inputting the password (each pushed button shows an asterisk *) the application should show yet another bitmap, which would inform whether the password was correct or not.
So in principle I would like to create something that looks like password screen in any Hollywood movie!
Raspberry should boot directly to the application.
I was expecting that this would be easy to do (and it would be if we could use Windows and Visual Studio), but I haven't yet found a simple tool to create this for pi. Booting Raspberry into browser with kiosk mode and creating HTML application seems like an overkill.
Although a browser in kiosk mode might look that a sledgehammer to crack a nut, I think you might find this nut harder than it looks.
It wouldn't be difficult to write a simple app in Java, or Python, or perhaps even C using GTK, that carries out the actions you want. You could have the app loaded when X starts, as an alternative to a desktop and Window manager. You could even do away with X altogether, and write some code that interacts directly with the video framebuffer and the keyboard hardware. Or, heck, go the whole hog, and have your code substitute for the operating system kernel :)
I would guess that even the simplest of these approaches involves more work than hacking something up using a HTML and JavaScript in a browser.
I have a small robot which runs on a raspberry pi.
I need to be able to control it with an RF remote to trigger a few different terminal commands which run short python scrips.
Previously I did this with a GUI on my macbook, triggering these commands over ssh, but I now need to be able to trigger them in the absence of an internet connection.
The remote I bought is:
https://www.adafruit.com/products/3092?gclid=CNPj7LjTgNECFdOPswodsiULYA
I realize that this is designed for OSMC.
This remote shows up as a USB keyboard on the Pi, which makes the challenge more general:
* - How could one rig a 'USB keyboard device' to trigger entire terminal commands with the click of one key?*
My low-level knowledge of hardware is limited, and my programming experience extends little beyond python.
Any direct solution or suggested reading is much appreciated.
I am also open to alternatives, however I do not have time to order new hardware online.
You could write a python script which uses the 'os' library to interact with the terminal, have it looking for certain keystrokes and then writing the relevant commands to the terminal via os.
e.g
if (KEY == "F"):
os.system("cd Dropbox")
I have no idea how to do formatting here, but you get the idea.
I'm rather unexperienced on the field of microcontrollers, I come from a Java background so the question might seem a bit noob but I didn't find much information on this.
So is it possible to debug an STM32F4 board via bluetooth (using eclipse or some othe IDE)? And if so could you send me some links that might help? We're building a robotic car controlled by a discovery board and debugging using an USB cable is not really an option if we don't want to disassemble the whole stuff every time something goes wrong. Hence this would really come in handy. So any help is appreciated
For doing this you would need to find a "Bluetooth Enabled" Debugger. I have never seen any and not sure whether there exists such thing or not.
I would suggest you one thing:
Assuming you have bluetooth connectivity between your board and your Machine,
Insert Debug strings: Send some strings from your board to your PC via Bluetooth. These strings will give you what's going on in Circuit.
For example, After Initialization, send "Init Completed" and like that. You can see these strings and see what's wrong.
I usually do this for my Wireless Device.
What you're wanting to do is really not practical; you're coming at this from way too high a level and trying to imagine the system as if it were running an operating system from the word go.
When you get the STM32 it as empty shell; you need to program it to do what you need to do and the only [sensible] way to get register-level debugging is to use a JTAG interface.
If, and this is a big if, you get it working reliably, but just want to give some debug information back while it is running, you could write a load of routines within the code to send out debugging messages when it enters certain parts of the program - and send it out over Bluetooth - but this is nothing like what you're used to single stepping through your Java code with Eclipse. If you want to do that kind of thing, you are going to have to put a little connector on that allows you to connect your JTAG or two-wire debugger cable to the processor. Even then, when you do that, you will be completely resetting your program and not simply single stepping through from where it went wrong.
You could insert a monitor program within your program to send out register values, program status etc over Bluetooth, but you still have to write the inital code and the only way to do this with out a ridiculous amount of trail and error is via your JTAG or two-wire interface.
Would this product work? It's a "IOGEAR Bluetooth Serial Adapter, GBC232A" for connecting to a serial port over bluetooth. I'm interested in wireless debugging too because my surface-clone dev computer only has one usb and this seems like it could be convenient over a tangle of usb cords and a usb hub. I have zero experience with any of this, so maybe you could validate or invalidate it as an option. I figure it just needs a proper serial connector wired up on the board and power from on-board?
I'm trying to program some tool and i want to simulate a network cable lose with it.
So i want to get the same effect like i unplug the networkcable from my computer and plug it in again. It's not the same as the '/renew' / '/release' commands. When i disconnect / connect it manualy it look likes windows remember some things and it's connected very fast back again.
Is it possible and maybe how to do it in code?
Thank you very much!
edit:
I found another program that just blocks all ports, this is ok for me too but how to do in code :).
You should set the fetch and send data bitrate to 0
Alternatively you could just set the receive bitrate to 0 bits and leave the send untouched this would also simulator the same.
Check out a great little tool called WANem . You can use it to simulate different WAN scenarios. Loss of connectivity is one possibility, but also jitter, noise and more on the line. Even simulating a dial-up connection. Runs as a bootable ISO and very easy to use.
Got a customer request but no idea can it be done. So need your opinions on this. This might be a utterly stupid thing to ask but yet need some facts so can work out best solution.
Scenario,
My Customer is an OEM Manufacturer. They make an automated system with a embedded touch screen (Windows XPe) this system got a button panel with some LED indicators (apart from keyboard) and 7 USB Ports. These button panels and USB ports are checked before sending to QC process. Currently a USB thumb drive with standalone executable with all indicators and controls flags is inserted to one of the USBs and then will run the exe. This exe capture user inputs from button panel and indicate which button is pressed so that it can be verify as working. And from program user can set LED indicators to different states (flashing, steady and off) so they can be verified as well. Once this is done then USB thumb drive will be inserted to each port and will verify it recognise. But after each verify step it needs to safely remove the drive from task bar. Once each test is finish user required to fill up the sheet with all pass and fail states for the entire button panel, indicators and USB ports. This is a quite length process when its come to mass production.
Apart from this embedded system all other components which suppose to connect to one of above embedded systems are tested via a program which I make and records all test outputs as they are tested. This program installed and components are connected to a testing embedded system.
Requirement,
What customer asks, can my program test completed embedded system with our host system (testing embedded system, may be via USB to USB) Its more like Testing a PC from another PC. Any ideas ?
Additional Info.
Apart from USBs there is one Network Port.
Thanks for looking, Feel Free to ask any questions. Any opinion is appreciated.
I'm not an expert on this topic, but it seems like this would be problematic because USB is an assymetrical protocol. There are hosts and there are devices. Hosts make the requests, and devices fulfill the requests. The problem is that PCs are USB hosts, not USB devices, so you would have two hosts trying to get the guy on the other side to do what he wants. Testing with a USB thumb drive worked because the thumb drive is a device.
It sounds like the unit to be tested doesn't have an ethernet port, which is a shame, because that would be the easiest way to go. If it has a serial port you could do it that way, but that is both slow and a hassle.