不在RPI上跑步！ python的ROS错误

Question

我正在遇到此错误的问题：

Traceback (most recent call last):
  File "/home/ubuntu/catkin_ws/src/pijoy/src/pijoy_node.py", line 13, in <module>
    GPIO.setup(LED_GPIO, GPIO.OUT)
RuntimeError: Not running on a RPi!

以下是我的代码：

#!/usr/bin/env python3
import rospy
from std_srvs.srv import SetBool
import RPi.GPIO as GPIO
LED_GPIO = 20
def set_led_state_callback(req):
    GPIO.output(LED_GPIO, req.data)
    return { 'success': True,
            'message': 'Successfully changed LED state' }
if __name__ == '__main__':
    rospy.init_node('led_actuator')
    GPIO.setmode(GPIO.BCM)
    GPIO.setup(LED_GPIO, GPIO.OUT)
    rospy.Service('set_led_state', SetBool, set_led_state_callback)
    rospy.loginfo("Service server started. Ready to get requests.")
    rospy.spin()
    GPIO.cleanup()

我已经将用户添加到GROUP GPIO，并且也完成了设置。仍然无济于事。