grove_o2.py 文件源码

def connect(self):
        if self.pseudo:
            rospy.loginfo('Connected to pseudo sensor')
            return
        try:
            self.serial = serial.Serial(self.serial_port, 19200, timeout=1)
            rospy.logdebug("self.serial.isOpen() = {}".format(self.serial.isOpen()))
            if not self.sensor_is_connected:
                self.sensor_is_connected = True
                rospy.loginfo('Connected to sensor')
        except:
            if self.sensor_is_connected:
                self.sensor_is_connected = False
                rospy.logwarn('Unable to connect to sensor')