I found these instructions How to build a cross compiler for your Raspberry Pi. It is a great walk through using a crosstool-ng tool which simplifies configuring a cross-compiler build A LOT (it has a nice curses-based interface) and it supports GCC 4.7. Seems to work great!
That happens often really often to me. I’m developing with it and it just happens from time to time. I was also able to reproduce your error within 5 minutes 😉 I’m running bluez v.5.17. However i can run lescan more than one time without this error. hcitool lescan Set scan parameters failed: Input/output error … Read more
On a Linux host, there are three possible ways to get access to the GPIO pins from within a Docker container. 1. Running Docker with the “–privileged” option Starting a container like this will give the container full access to the host’s devices, including GPIO: $ docker run –privileged -d whatever Check the Docker documentation … Read more
Set the option after the socket has been successfully initialized. So, after: sockfd = socket(AF_INET, SOCK_STREAM, 0); if (sockfd < 0) error(“ERROR opening socket”); You can add (with standard C99 compound literal support): if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &(int){1}, sizeof(int)) < 0) error(“setsockopt(SO_REUSEADDR) failed”); Or: const int enable = 1; if (setsockopt(sockfd, SOL_SOCKET, SO_REUSEADDR, &enable, sizeof(int)) … Read more
I have managed to run my Delta Forth .NET compiler on Debian 6.0 (Squeeze) and Mono. It worked flawlessly with full binary compatibility, the only thing I had to do was to recompile the code to target .NET 3.5 (instead of 4.0) since Mono on Debian lags a bit regarding .NET versions. The compiler is … Read more
Just run the following simple command on Raspberry Pi 3 running Raspbian Jessie. run terminal and type sudo raspi-config Go to: >Advanced Option > Resolution > just set your resolution compatible fit with your screen. then reboot If you didn’t found the menu on configuration, please update your raspberry pi software configuration tool (raspi-config). That’s … Read more
You can simply do this with help of AJAX… Here is a example which calls a python function which prints hello without redirecting or refreshing the page. In app.py put below code segment. #rendering the HTML page which has the button @app.route(‘/json’) def json(): return render_template(‘json.html’) #background process happening without any refreshing @app.route(‘/background_process_test’) def background_process_test(): … Read more
It’s a solution for Ubuntu (the idea also works for Windows or Mac) I just tried today and it works like a charm. Material a cross-over Ethernet cable (the name is fancy but it’s just a normal Ethernet cable) a laptop (ubuntu) a Raspberry Pi (I have the Pi2) Prerequisites on your ubuntu Install network-manager … Read more
I’m gonna try to write this as a tutorial for you so it becomes easy to follow. NOTE: This tutorial only works for older raspbian images. For the newer Raspbian based on Debian Buster see the following how-to in this thread: https://stackoverflow.com/a/58559140/869402 Pre-requirements Before you start you need to make sure the following is installed: … Read more
I’m adding this solution for people who make the same mistake as I did. In most cases: rename your project file ‘serial.py’ and delete serial.pyc if exists, then you can do simple ‘import serial’ without attribute error. Problem occurs when you import ‘something’ when your python file name is ‘something.py’.