你好，我想做一个RS-485传输与两个设备FT232(他们是通过USB与树莓皮3，但也与RJ45-我只想检查传输工作正常。我正在尝试使用来自https://github.com/pyserial/pyserial/blob/master/serial/rs485.py的RS485函数的PySerial
我试图创建自己的读，但很可能写和读传输不起作用(程序没有显示接收数据)。有读取功能：def read(self,n):
print(n)
if self._alternate_rs485_settings is not None:
self.setRTS(self._alternate_rs485_settings.rts_level_for_rx)
if self._alternate_rs485_settings.delay_before_rx is not None:
time.sleep(self._alternate_rs485_settings.delay_before_rx)
response = super(RS485, self).read(size=n)
super(RS485, self).flush()
if self._alternate_rs485_settings.delay_before_tx is not None:
time.sleep(self._alternate_rs485_settings.delay_before_tx)
self.setRTS(self._alternate_rs485_settings.rts_level_for_tx)
else:
super(RS485, self).read()
return response
我用setRTS来改变传输和接收端口(因为我想用RS-485，半双工传输)
如何正确地读写数据？在