everything rf

STM32W108 Wireless RF module General I/O interface application example, stm32w108ioSTM32W108 radio frequency module General I/O interface application example In this example, write the GPIO test program of javasw108, and control the LED lights by controlling the GPIO pins.Development Environment and Hardware Description Hardware: javasw108 Wireless Development Board, 5 V 1A power supply, J-Link writer, PC, etc. Software: IAR Embedded Workbench for ARM

Bluetooth from class1 ~ Class3 transmission distance is MB ~ 3 M. The typical maximum transmit power value is as follows: Class 1: 0 to + 20 dBm Class 2:-6 to + 4 dBm Class 3: up to 0 dBm You need to modify these pskeys first. Crystal frequency trimMake the crystal oscillator of the entire chip normal. Then adjust it as needed. TX and Rx Pio ControlTo see if external RF amplification is required. Last adjustment required Default transmit

Today, Rm-RF. * deleted an important email directory. Fortunately, it was restored through extundelete.Write down the operation process:1. PreparationsMainly throughExtundelete 0.2.0 Recovery completedDependent on two packages Sudo aptitude install e2fsprogs e2fslibs-dev Download PageHttp://extundelete.sourceforge.net/ Quick download:Download extundelete Tar-xjf extundelete-0.2.0.tar.bz2 CD extundelete-0.2.0 Compile Trilogy

1. Install Python,"Https://www.python.org/ftp/python/2.7.13/python-2.7.13.amd64.msi"System environment configuration, configure the environment, path is the path of installationTest is installed, run cmd as administrator, enter Python2. Install Pipcmd:get-pip.pyDoesn't seem to install.3. Install cmd to execute "Pip install Robotframework"4, install Wxpython (Python language of a good set of GUI graphics library)Address: "https://sourceforge.net/projects/wxpython/files/wxPython/2.8.12.1"5. Instal

1. Error messagesRm:cannot remove ' speechd-centos_6.2-prtl-pred-mf34/modules/t2p/py/third/g2p/.nfs00000000039b946b00000004 ': Device or resource busyRm:cannot remove ' speechd-centos_6.2-prtl-pred-mf34/modules/t2p/py/log/.nfs00000000039c52ef00000005 ': Device or Resource BusyRm:cannot remove ' speechd-centos_6.2-prtl-pred-mf34/modules/t2p/py/.nfs00000000039add2900000006 ': Device or Resource BusyRm:cannot remove ' speechd-centos_6.2-prtl-pred-mf34/modules/t2p/py/.nfs00000000039ae1bf00000007 ':

1. Reset response (answer to request) The reader calls a card in the magnetic field to respond to the call. For cards that have just entered the magnetic field and obtained an electrical reset in the idle state, the card Request (reqa, 0x26); for cards that have been read and written and enter the sleep state, wake-up (wake-up, 0x52 ). In this solution, the card Request (reqa) can only call cards in the idle state. WAF can call all cards, including those in sleep state (halt) and casual status

Linux data recovery ext3grep rm-rf 1. First install ext3grep software: yum install ext3grep-y 2. umount/data0 partition: umount/data2 if busy is prompted, kill the process that is using this directory first, and then umount: fuser-k/data2 www.2cto.comUmount/data2 3. query all Inode (execution takes several minutes ~ More than 10 minutes): ext3grep/dev/sdb1-ls-inode 2 4. Search for Inode step by step to see if httpcws can be found. cpp file (this step

In the past, IC card-type electric energy meter and one card (water and electric heating) systems were used with contact IC cards, which had weak anti-interference capability and outstanding quality problems, especially open read/write windows. It is vulnerable to external attacks. The hitag RF card and its supporting read/write modules completely solve the above problems. The cost is only slightly increased, but the product quality is greatly improve

Randomness in random forests is reflected in: 1. Randomness of training data 2. Choosing the randomness of a split propertyCan solve the problem of classification and regression, and all have good estimation performance1. Generating a data description fileMahout describe-p input.csv-f Input.info-d2 I 3 n i 5 n i 3 C L (description file for executing describe generated data)2. Training modelMahout buildforest-d input.csv-ds input.info-sl 5-p-t 5-o forest_result (generate random forest model resul

#coding =utf-8Import Osdef Join (ARR,JOIN_FALG): Res="" forAinchArr:res+ + +Join_falgreturnresdef get_file_parats (file): Path_arr= File.split ("/") Last_index= File.rindex ("/") Parents_path=File[:last_index]returnparents_path# Creating folders by recursion def file_mkdir2 (file): dirs= File.split ("/") forIinchRange1, Len (dirs) +1): D= Join (Dirs[:i],"/") ifNot os.path.exists (d): Os.mkdir (d) #file_mkdir2 (".. /FILE/TESTDIR5/INNER/8/2/3/4/5") #删除所有叶子节点的文件def Rm_dirs (path,path

Some people have been experiencing WiFi problems with Ubuntu 10.10 since a update that happend just before Christmas 2010 . The problem seems to being a bug in a kernel module, which prevents the Rfkill ' s soft and hard blocks from syncing correctly. In practice so means you can press your laptop's WiFi button as often as you want, it doesn ' t change anything. Your Wireless adapter would always appear as disabled. If you are try to start the wireless interface manually your get the following

1, the RF parameter method reference: http://wakemeup.space/?p=187 http://blog.csdn.net/y0367/article/details/51501780 http://blog.csdn.net/sun_shengyun/article/details/54618121 2, AdaBoost parameter method: Http://www.cnblogs.com/pinard/p/6136914.html 3, GBDT parameter method: Http://www.cnblogs.com/pinard/p/6143927.html http://blog.csdn.net/han_xiaoyang/article/details/52663170 4, Xgboost parameter method: http://blog.csdn.net/han_xi

files under EXT4 partition[6] Data mistakenly deleted under Linux is no longer a horrible thing, ext3grep to help you recover[Recovery of deleted files in 7]EXT4 partition[8] Recover files mistakenly deleted on Linux EXT4 partition[9] "Linux" Linux system ext4 format delete File recovery: ExtundeleteHttps://www.cnblogs.com/jikexianfeng/p/7349275.html (The above sections are transferred from this article)http://blog.csdn.net/weiguang1017/article/details/52239685 (The above sections are transferr

respectively represents what the permission number represents: R-------------4w------------2x-------------1rwxrw-r-- 7 6 43 groups, rwx permissions corresponding to 421 add 7,rw-corresponding 42 Add the 6,r--corresponding to 4 (drwxrw-r--here the first character d for the folder;-rwxrw-r-- Here the first character-represents a normal file) 6, So let's see what the above 755 represents. 7 corresponds to 4+2+1 rwx5 corresponding 4+1 R-x then the permission of this file is the owner rw

Some people has been experiencing WiFi problems with Ubuntu 10.10 since a update that happend just before Christmas 2010 . The problem seems to is a bug in a kernel module, which prevents the Rfkill ' s soft and hard block from syncing correctly.In practice this means you can press your laptop's WiFi button as often as you want, it doesn ' t change anything. Your Wireless adapter would always appear as disabled. If you try to start the wireless interface manually you get the following error mess

1. Use the root user to create the/usr/local directory. rmov.sh#!/bin/shpara_cnt=$#Trash_dir= "/data01/.trash"For i in $*; Doif [$i = = "-rf"-o $i = = "-r"-O $i = = "F"]Then:Elsestamp= ' Date +%s 'Filename= ' basename $i 'MV $i $TRASH _dir/$fileName. $STAMPFiDone2, check the disk which space capacity is large, I am currently using the/DATA01 directory, in this directory created. Trash Directory3. Add aliases alias rm= "Sh/usr/local/.rmov.sh" in the/et

(Click the public number above for a quick follow-up) February 4, 2017, GitLab a serious deletion of the library accident. April 5, 2017, a well-known VPS service provider Digitalocean There was an accident to delete the production database. On April 24, RM-RF * * Also added a "murder" ... VPS Service Provider Kuriko Official website issued a notice, said: Because the engine room technician RM-RF