problem: the project needs to develop 485 serial communication on the android panel. The serial port needs to be monitored after the read command is sent, and the communication is not considered to have failed after N time. Use java s FutureTask with F...
recently, after writing a PLC communication protocol, I sent it a command to read 1 byte after the address 0x0000 (the address 0x0000 exists in PLC, and sent successfully, and the data sent is correct), it should send me 12 bytes (including ACK, site nu...
problem description Open two serial ports at the same time in Android environment, one of them receives the instruction and sends the instruction to the other, but the command of the second serial port will block and often return garbled or the two in...
is using RXTX to write its own communication protocol. At present, one of the problems encountered is: a sends data to B, assuming that the header data of frame I received by B fails to pass, and B requires A to resend, so how can I correctly deal with ...
as shown in the following figure: it feels like solving the problem of 1px line on retina screen. It can be that the border is all set to 2px. Ask for advice link (opened on mobile) ...
such as admin userController index userController in php framework how to create it in beego? I haven t found any documents and instructions similar to this writing method for a long time ...
is currently completing a simple kernel module coding job that simulates the rootkit hidden process. According to the observation of strace ps , the ps program traverses the directory through open proc opening fd, and getdents < fd > . The functi...
how to run a vue.js project in idea what I search on the Internet is to change me to ECMAScript 6, and then install the first two parts of vue. Let me continue to click on the plus sign and choose npm, but I click on the + sign. How can I run witho...
this code is the method I used to concatenate parsing objects into url strings encodeParamsStr: function(obj) { var params = []; Object.keys(obj).forEach(function(key) { var value = obj[key]; undefined if (typeof value ===...