Question

我想使用我的投影机与树莓派2的串行连接。我有一个小的python脚本在Windows上工作（来自Full examples of using pySerial package）。

import time
import serial

ser = serial.Serial(
    port='COM3',
    baudrate=115200,
    parity=serial.PARITY_NONE,
    stopbits=serial.STOPBITS_ONE,
    bytesize=serial.EIGHTBITS
)

if ser.isOpen() : 
    ser.close()
ser.open()

print ser.portstr

print 'Enter your commands below.\r\nInsert "exit" to leave the application.'

input=1
while 1 :
    # get keyboard input
    input = raw_input(">> ")
    if input == 'exit':
        ser.close()
        exit()
    else:
        ser.write('\r' + input + '\r')
        out = ''
        time.sleep(1)
        while ser.inWaiting() > 0:
            out += ser.read(1)

        if out != '':
            print ">>" + out

要在linux上使用它，我唯一改变的是port ='COM3'到port ='/ dev / ttyUSB0'。我检查了dmesg | grep -i tty，这是好的。

我的问题是当我发送如下命令： “* pow = on＃”打开投影机，它适用于Windows但不适用于Linux。可能是一些编码问题？

感谢。

编辑：dmesg的输出（回复时间太长）

[  211.001768] usb 1-1.2: new full-speed USB device number 5 using dwc_otg
[  211.104934] usb 1-1.2: New USB device found, idVendor=1a86, idProduct=7523
[  211.104965] usb 1-1.2: New USB device strings: Mfr=0, Product=2, SerialNumber=0
[  211.104981] usb 1-1.2: Product: USB2.0-Ser!
[  211.131759] usbcore: registered new interface driver usbserial
[  211.131932] usbcore: registered new interface driver usbserial_generic
[  211.132061] usbserial: USB Serial support registered for generic
[  211.136250] usbcore: registered new interface driver ch341
[  211.136485] usbserial: USB Serial support registered for ch341-uart
[  211.136623] ch341 1-1.2:1.0: ch341-uart converter detected
[  211.143994] usb 1-1.2: ch341-uart converter now attached to ttyUSB0

命令投影机通过RS232与Linux上的pyserial

0 个答案: