docs: def setProvisioningUrl(self, strURL='grl.com'):
          """set provisioning Url
  
          Args:
              strURL: Provisioning Url string
  
          Returns:
              True: successful to set provisioning Url
              False: fail to set provisioning Url
          """
          print '%s call setProvisioningUrl' % self.port
          self.provisioningUrl = strURL
          if self.deviceRole == Thread_Device_Role.Commissioner:
              cmd = WPANCTL_CMD + 'setprop Commissioner:ProvisioningUrl %s' %(strURL)
              print cmd
              return self.__sendCommand(cmd)[0] != "Fail"
          return True