# RTDE returns empty byte objects

**URL:** <https://forum.universal-robots.com/t/rtde-returns-empty-byte-objects/23757>\
**Category:** Robot Communication\
**Created:** [September 9, 2022, 11:57am UTC](https://forum.universal-robots.com/t/rtde-returns-empty-byte-objects/23757 "2022-09-09T11:57:37Z")\
**Posts on this page:** 1\
**Page:** 1

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**Author:** ![giorgigedaminski](https://avatars.discourse-cdn.com/v4/letter/g/898d66/32.png) [@giorgigedaminski](https://forum.universal-robots.com/u/giorgigedaminski)\
**Post date:** [September 9, 2022, 11:57am UTC](https://forum.universal-robots.com/t/rtde-returns-empty-byte-objects/23757/1 "2022-09-09T11:57:37Z")

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Hi, I am new in this field and trying to remotely control universal robot with primary and rtde interface. I don’t need much information so we don’t want to use some big libraries or frameworks.

For primary interface code worked perfectly:

import socket

s = socket.socket(socket.AF\_INET, socket.SOCK\_STREAM)

s.connect((“localhost”, 30001))

s.send(movej(p[-0.175,-0.607,0.092,1.211,-1.215,1.113], a=1,v=0.25)" + “\n”.encode())

s.close()

Robot moves, but with rtde I have some problems. Code looks like this:

import socket

s = socket.socket(socket.AF\_INET, socket.SOCK\_STREAM)

s.connect((“localhost”, 30004))

s.send(movej( ‘get\_actual\_tcp\_pose()’".encode())

tcp = s.recv(77)

print(tcp)

s.close()

it prints empty byte object (b""), decoding it also gives empty string. I think problem is with incorrectly using socket. Please help me how to get actual data