serial-port

问题 I need to add printing functionality on a zebra ZQ520 bluetooth thermal printer in an application developed in flutter (Android), does anyone have any suggestions or packages to perform this task? I tried with the packages: esc_pos_printer, esc_pos_bluetooth, flutter-zsdk, zsdk , but I was not successful. Thank you! 回答1: You can have mine plugin from https://github.com/gmeles/flutter_cblue You place it in the project root folder and add your dependency on pub spec.yaml like dependencies:

问题 I need to add printing functionality on a zebra ZQ520 bluetooth thermal printer in an application developed in flutter (Android), does anyone have any suggestions or packages to perform this task? I tried with the packages: esc_pos_printer, esc_pos_bluetooth, flutter-zsdk, zsdk , but I was not successful. Thank you! 回答1: You can have mine plugin from https://github.com/gmeles/flutter_cblue You place it in the project root folder and add your dependency on pub spec.yaml like dependencies:

问题 I am working on developing a windows store app on my windows 8.1 system,64 bit (I need to deploy this app on my windows surface pro 3 tablet), technology being used is C#. I need to communicate through the RS-232 port. For this I am using the SerialPort class which falls under the namespace System.IO.Ports. But when I am including this in my C# code, I am getting the error - "The type or namespace name 'Ports' does not exist in the namespace 'System.IO' (are you missing an assembly reference?

问题 I am working on developing a windows store app on my windows 8.1 system,64 bit (I need to deploy this app on my windows surface pro 3 tablet), technology being used is C#. I need to communicate through the RS-232 port. For this I am using the SerialPort class which falls under the namespace System.IO.Ports. But when I am including this in my C# code, I am getting the error - "The type or namespace name 'Ports' does not exist in the namespace 'System.IO' (are you missing an assembly reference?

问题 I am working on developing a windows store app on my windows 8.1 system,64 bit (I need to deploy this app on my windows surface pro 3 tablet), technology being used is C#. I need to communicate through the RS-232 port. For this I am using the SerialPort class which falls under the namespace System.IO.Ports. But when I am including this in my C# code, I am getting the error - "The type or namespace name 'Ports' does not exist in the namespace 'System.IO' (are you missing an assembly reference?

问题 I have a gps module that sends data (NMEA sentence) every 1 seconds to the serial port. I've been trying to read it from a c++ program. When reading the serial port with picocom, data is displayed in a clean way, each line has a NMEA sentence). The result of my program is close but lines are sometimes mixed. This is my code: #include <iostream> #include <stdio.h> #include <string.h> #include <fcntl.h> #include <errno.h> #include <termios.h> #include <unistd.h> int main(){ struct termios tty;

问题 I have a gps module that sends data (NMEA sentence) every 1 seconds to the serial port. I've been trying to read it from a c++ program. When reading the serial port with picocom, data is displayed in a clean way, each line has a NMEA sentence). The result of my program is close but lines are sometimes mixed. This is my code: #include <iostream> #include <stdio.h> #include <string.h> #include <fcntl.h> #include <errno.h> #include <termios.h> #include <unistd.h> int main(){ struct termios tty;

问题 I am trying to figure out a nice solution to reading serial data, and what to do when a read() is done but it contains an incomplete message. The expected messages between devices have a defined start and end byte so its easy to see when a message starts and ends. I can open a serial port fine and read from the serial port. But I am encountering the computer is reading faster than data coming through and I get an incomplete message. For this example, lets say the message expected is 0x10 0xFF

问题 1 . i have problem with CAS MWP 3000H , problem is serial protocol sends data 7 bit LSB fist data but C# i can read only readbyte not bit so problem is UEFI order is LSB First,, for examle MSB first data 4 = (binary 00000100) but if LSB first value this will be 00100000 and serial know 00100000(binary) = 10000(binary) so i take wrong data i need help for readbit first or library like this i need . or any one solve this problem with other solution or other languadge 2 . i nearly solve this

问题 Following up with Serial Port Communication solution I implemented the below design. My code uses com8 to communicate with a Serial Port Utility Application that is listening on com9 within the same machine, then sending back (manually I type a message and press a button) In my main I do this: MyClass MyObj = new MyClass(); var message = MyObj.SendThenRecieveDataViaSerialPort("Test"); And then in my class I have this: private static SerialPort MainSerialPort { get; set; } = new SerialPort();