通过pyserial

Question

import serial
import time


def send_command_to_com_port(ser, command):
    try:
        # Send the command
        command_encoded = command.encode('ascii')
        ser.write(command_encoded)
        print(command_encoded)

    except serial.SerialException as e:
        print(f"Error communicating with the COM port: {e}")


def read_from_com_port(ser):
    try:
        # Read response from the COM port
        response = ser.read_until("\n")  # Read until a newline character is encountered
        if response:
            print(f"Response received: {response.decode('ascii').strip()}")
        else:
            print("No response received from the COM port.")

    except serial.SerialException as e:
        print(f"Error communicating with the COM port: {e}")


# Specify the COM port and send the command
com_port = "COM4"

# Configure the serial connection
ser = serial.Serial(
    port=com_port,  # Replace with your COM port (e.g., 'COM3' on Windows or '/dev/ttyUSB0' on Linux)
    baudrate=115200,  # Baud rate
    bytesize=serial.EIGHTBITS,  # 8 data bits
    parity=serial.PARITY_NONE,  # No parity bit
    stopbits=serial.STOPBITS_ONE,  # One stop bit
    timeout=1  # Timeout in seconds
)

# Ensure the COM port is open
print(f"Serial port opened: {ser.is_open}")

# Send commands to the COM port
send_command_to_com_port(ser, 'm0\n')
time.sleep(2)
read_from_com_port(ser)

# Close the serial port
ser.close()
print("Serial connection closed.")

我使用以上代码获得的输出始终是：

Serial port opened: True
b'm0\\n'
No response received from the COM port.
Serial connection closed.

Process finished with exit code 0

additional注意：设备的所有说明都必须是ASCII编码的，并且必须以newline字符结尾' '

发送命令“ M0”后，我应该收到一个字符串的确认。但是我什么都没有。
    

在python中，您需要将newline字符指定为字节：response = ser.read_until(b"\n")

"\n"

是两个字符，而

Answer 1

是一个字节定界符。 python 3：

https：//docs.python.org/3/library/stdtypes.html