我正在编写代码以通过蓝牙从Python的串行端口从生理监护仪检索数据。我需要将十六进制代码发送到监视器以接收数据。我已成功连接到端口,但是无法发送十六进制代码。十六进制字符串是给我的,但是它来自C#,我不知道是否需要转换它以便Python可以读取它。当我执行下面的代码时,我的错误消息状态为:
TypeError:fromhex()恰好接受一个参数(给定61)
这是C表示法中的字符串{0x7E,0x00,0x3A,0x00,0x00,0x00,0x00,0x80,0xDE,0xFB,0x2C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,#0x00,0x09,0x00,0x00,0x00,0x00 0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x05,0x00,0x0C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00 0x00,0x04,0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE2,0x7E}
import serial
ser = serial.Serial(
port='/dev/cu.PARANISERIAL-GenericSer',
baudrate=9600,
timeout= 10,
parity=serial.PARITY_NONE,
stopbits=serial.STOPBITS_ONE,
bytesize=serial.EIGHTBITS
)
message_bytes = bytes.fromhex(0x7E0x00/0x3A/0x00/0x00/0x00/0x00/0x80/0xDE/0xFB/0x2C/0x00/0x00/0x00/0x00/0x00/0x00/0x00/0x00/0x00/0x09/0x00/0x00/0x00/0x00/0xFF/0x00/0x00/0x00/0x00/0x00/0x00/0x00/0x00/0x00/0x00/0x00/0x00/0x00/0x00/0x00/0x01/0x05/0x00/0x0C/0x00/0x00/0x00/0x00/0x00/0x04/0x05/0x00/0x00/0x00/0x00/0x00/0x00/0x00/0xE2/0x7E)
ser.write(message_bytes)
print (ser.is_open) # True for opened
if ser.is_open:
while True:
data = ser.read(10)
print(data)
print(str(data.decode()))
else:
print('no data')
time.sleep(1)
else:
print('z1serial not open')
s = ser.read(100)
print(str(s.decode()))
ser.close()
print(ser.isOpen())
任何指导将不胜感激。谢谢
[bytes.fromhex
将转换字符串,如果除去了所有非十六进制字符:
>> h = '0x7E,0x00,0x3A,0x00,0x00,0x00,0x00,0x80,0xDE,0xFB,0x2C,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,#0x00,0x09,0x00,0x00,0x00,0x00,0xFF,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0x01,0x05,0x00,0x0C,0x00,0x00,0x00,0x00,0x00,0x04,0x05,0x00,0x00,0x00,0x00,0x00,0x00,0x00,0xE2,0x7E'
>>> bytes.fromhex(h.replace('0x', '').replace(',', '').replace('#', ''))
b'~\x00:\x00\x00\x00\x00\x80\xde\xfb,\x00\x00\x00\x00\x00\x00\x00\x00\x00\t\x00\x00\x00\x00\xff\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x00\x01\x05\x00\x0c\x00\x00\x00\x00\x00\x04\x05\x00\x00\x00\x00\x00\x00\x00\xe2~'