$ RTL-SDR dongle to find it yourself)
A source. wav file
Make and Libsndfile1-dev
Pifmrds from GitHub
To start, let's take care of the software requirements by running apt-get update and apt-get install upgrade
Apt-get Install make Libsndfile1-dev
Step 2:download Configure pifmrdsConnect your Pi to a HDMI display or SSH into it from your laptop. To clone Pifmrds, type the following into a terminal window:
git
How to enable Raspberry Pi to enter the graphic interface by default
I have been buying Raspberry Pi for some time, but to be honest, I have hardly used it to do anything. After my Dell super book was delivered to the Dell Service Center (for weeks), I began to use Raspberry
deployment are reflected in this, and the algorithm is copied directly to the Raspberry Pi to run debugging. Debugging process a little bit complex, the first effect is not good, patient adjustment, patience to change the algorithm, the effect will slowly come out.The effect of the motion let's look at the following content.third, follow -up demonstrationIndoor
Recently, I bought a Raspberry Pi 3b+, ready to put a. Net core crawler on it and run it.Buy before thought Raspberry Pi because it is new this year, leading to drive and system what is not very perfect, led to go a lot of detours, early know to buy
Recently found a fun thing, Lakka, what is it? It is a game simulator, but not those simple game simulator, it can play a lot of games, arcade games, red and white machine games, PS games, such as the synthesizer.A link to the official website: Lakka official websiteAbout Lakka's introduction, the direct official website cut a diagram to explain under:Four points: strong, friendly, low cost, open source!!Friendly on the table now to realize this universal game is too easy! The steps of the offic
If you have dense phobias, you only need to look at the bold Section of the title and font. If you have an underline, you can click it on the website.
There are many common Linux system branches in China:
1. Debian
2. RedHat
Refer:Overview of the evolution of GNU/Linux releases over the years.
At present, the Debian branch of the desktop version is better than the RedHat branch of the server, because the Raspberry
You can use SSH to connect to your Raspberry Pi on a Linux or Mac computer (or another Raspberry Pi) terminal, and you don't need any other software.You need to know your Raspberry Pi IP address to connect to it. Query IP, you can
How to Use QEMU to simulate Raspberry Pi
The following describes how to use QEMU to simulate Raspberry Pi. After using this method, the system can be tested without a Development Board.
Development Environment
The Host OS environment used for testing is Debian 7.2 Wheezy amd64.
Guest OS is the Debian Raspbian () after
Windows 3.1 is running on a Raspberry Pi, and you naturally want to run Windows 10. So you're ready to install a system of Windows IoT core on the Raspberry Pi. When writing this text, it's not the first time that you've installed Windows IoT core. After I got the
start the build process and then wait a long time to complete it.$ time Make Deb
Real 350m48.228sUser 0m22.140sSYS 0m4.870s
On a fast Raspberry Pi 3, the entire build process takes almost 6 hours, but in the end we will get some installation packages for different arm operating systems after Docker Engine v1.12.0 build.$ ls-al ~/docker/bundles/1.12.0/build-deb/*/*.deb-rw-r--r--1 root root 15933554 10:46/
/linux.gitGit clone -- depth 1 git: // github.com/raspberrypi/tools.gitGit clone git: // github.com/raspberrypi/firmware.git
Install the tool chain and add it to the environment variable:
Tar xvf tools-master.tar.gz-C/optVim/etc/profileExport PATH = $ PATH:/opt/tools-master/arm-bcm2708/gcc-linaro-arm-linux-gnueabihf-raspbian-x64/bin./Etc/profileMusic linux-rpi-4.1.y linuxCd linux
Ensure that the compilation directory is clean (if extracted from the tar.gz file, it can be omitted)
Make mrproper
G
resize2fs /dev/mmcblk0p2
This command expands the second partition to the new space.
Check hard disk usage. OK
df -hOperating principle
First, the Linux primary partition and the Swap partition are deleted. The starting position of the re-built primary partition is the same as that of the original primary partition, and then the data of the original primary partition is not changed, but the size of the primary partition is changed.
How to run Ubuntu
How to Use image effects on Raspberry Pi
Now you can use the Raspberry Pi camera module ("raspi cam") to add a variety of image effects to your photos, just like using a card camera. The raspistill command line tool provides a wide range of image effects options for Raspberry
Setting up Windows Ten for IoT on your Raspberry PiThis week on the BUILD conference in San Francisco Microsoft released the first preview of the Windows IoT (Internet of Thi NGS) for Raspberry Pi 2 (AS-well-lovely devices like the Intel Galileo and Minnowboard Max).First, as I mentioned in February the Raspberry
"select * from Temps;" In the console and return the results as follows. rpi.cpu|2014-08-03 10:40:40|48.7rpi.cpu|2014-08-03 10:41:41|48.7rpi.cpu|2014-08-03 10:42:41|49.2RPi.CPU| 2014-08-03 10:43:41|48.7rpi.cpu|2014-08-03 10:44:41|48.7rpi.cpu|2014-08-03 10:45:41|49.23 boot background run"Startup script"--auto-start.shCreate a new auto-start.sh script in this directory, as follows #!/bin/bashcd/home/pi/pytho
without your password. In this way, even if someone copies your key, they cannot impersonate you for access. If you want to use a password, enter the password, press enter, and then enter the password again as prompted. If you press enter without entering anything, the password is not used.
Now you should be able to see files such as id_ras and id_ras.pub in the. Ssh folder in your home directory:
ls ~/.sshauthorized_keys id_rsa id_rsa.pub known_hosts
HereId_rsaThe file is your private key,
device to the common Nic, and then connect to the Internet through the NIC. That is, the NAT structure mentioned above. Next, we need to configure the NAT address table to open/etc/sysctl.confAdd the following configuration file to the last line of the file:
net.ipv4.ip_forward=1
Then, start NAT in the kernel:
sudo iptables -t nat -A POSTROUTING -o eth0 -j MASQUERADEsudo iptables -A FORWARD -i eth0 -o wlan0 -m state --state RELATED,ESTABLISHED -j ACCEPTsudo iptables -A FORWARD -i wlan0 -o eth0
-S terminal name
Create a new background virtual terminal
-ls
View the background virtual terminal you have created
-R Terminal Name
Enter the terminal
Shortcut keys
Shortcut keys
Then press
Role
Ctrol+a
D
Save a background virtual terminal
Ctrol+a
W
Show list of all windows
Ctrol+a
Ctrol+a
Switch to the previously displaye
to MQTT topic
(4) Run the code and test it in AWS IoT to receive incoming Raspberry Pi sensor data(5) Data statistics can also be seen in ElasticSearch2.3 Configuring KibanaAWS ElasticSearch has a Kibana built in by default and can see its links on the ES interface. Open the link, and then make the following configuration:(1) Configure index patternThe purp
twice // enable the root account to log on to sudo passwd -- Unlock Root
4. Expand the available space
Execute the prompt script
Sudo raspi-config
Select the first expand filesystem to expand the available space on the SD card. Otherwise, there will be a lot of software and cannot be installed (the prompt is insufficient space, such as MySQL ).
After expansion, you must execute the restart command.
sudo reboot
Then run the DF-H command to see t
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