How I can connect the lego spike prime hub via bluetooth in visual studio code using the pybricksdev library?

[tommlazzza]

I'm trying to send some data from the hub to the terminal for some debug. But I can't figure out how I can connect the hub via Bluetooth to my PC. I tried to look in the [API documentation][1] and maybe I found something but I'm not sure.

1

[dlech]

pipx run pybricksdev run ble my_program.py

[cegekaJG]

I can connect with my hub, but if my script imports any libraries, I get an error.

Traceback (most recent call last):
  File ".\server\app.py", line 1, in <module>
ImportError: no module named 'asyncio'

import asyncio
from flask import Flask, jsonify, request
from controller import Controller
import broadcast
import json
from sys import argv

try:
    env = argv.pop(1)
except IndexError:
    env = 'default'
...

Is it possible to connect my hub within my Python script?

[laurensvalk]

Is it possible to connect my hub within my Python script?

Does this project do what you need? https://pybricks.com/projects/tutorials/wireless/hub-to-device/pc-communication/

[cegekaJG]

I think I can work with that. The guide mentions that it's also possible to communicate using the PyBricks API, but there are no examples. Do you know where I can find one?

[dlech]

I'm not sure what you mean. There currently aren't any communications APIs for Powered Up hubs. There are Bluetooth mailboxes for EV3 - perhaps that is what you are referring to?

[cegekaJG]

No, I am using the Mindstorms Inventor Hub. I was referring to this section: https://pybricks.com/projects/tutorials/wireless/hub-to-device/pc-communication/#further-exploration-ble-terminal

[laurensvalk]

I would start with the example given in that tutorial.

But the example is there for the BLE terminal too. All you need to do is replace the code from this section with the oneliner of this section.

• Then, disconnect the hub from Pybricks Code.
• Connect to the hub from your own app
• Start the program on the hub by pressing the button
• All BLE data now consists of REPL "terminal" commands.