This chapter mainly implements the conversion of commands into the encoding method of 1 out of 4 in ISO1569, and realizes the PPM conversion of commands. Here we only briefly introduce the coding rules. 4 takes 1, 2bit encoding, low bit to high bit; b2b1, b4b3, b6b5, b8b7. Based on this encoding method, 8-bit data […]
Tag: ppm
How AppMap’s Runtime Analysis Finds Performance and Security Vulnerabilities
Software and application development is difficult. Generating bug-free and error-free code is more difficult, and sometimes finding problems in our software can be half the battle in creating safe, reliable, and performant applications. We spend a lot of time and money running, testing, and monitoring our code, trying to find the root cause of issues […]
ESP8266 reading ppm signal method
**ESP8266 reading ppm signal method, dedicated to remote toy cars The code at the bottom is: read the PWM signal of the receiver, and then send it to the relay of the server ** The following code can read the PPM signal of the Dumbo gun control or the microphone remote control. The personal test […]
[Solved] [hive error] Could not find or load main class org.apache.hadoop.mapreduce.v2.app.MRAppMaster
Article table of contents Method 1: hive is set to execute in loacl mode Method 2: Add the Hadoop classpath path to the yarn-site.xml file Method 1: hive is set to loacl mode execution start hive set hive.exec.mode.local.auto=true; Method 2: Add the Hadoop classpath path in the yarn-site.xml file [root@vm-CentOS75-0-149 /]# /opt/bdp/hdfs/bin/hadoop classpath /opt/bdp/hadoop-2.10.1/etc/hadoop:/opt/bdp/hadoop-2.10.1/share/hadoop/common/lib/*:/opt/bdp/hadoop-2.10.1/share/hadoop /common/*:/opt/bdp/hadoop-2.10.1/share/hadoop/hdfs:/opt/bdp/hadoop-2.10.1/share/hadoop/hdfs/lib/*:/opt/bdp/hadoop- […]