Troubleshooting

Having trouble?

Let's get you rolling again. If you don't find your issue here, file an issue on Github.

ImportError: No module named functools_lru_cache

This error is usually the result of running pipenv in Python 2.7 without the backport of functools_lru_cache installed. There are two options to resolve this error:

1. Add the missing dependency to your system python 2.7 installation

sudo apt install python-backports.functools-lru-cache

OR

2. Uninstall pipenv from your system python 2.7 installation, then reinstall pipenv in Python 3

pip2 uninstall pipenv

 pip3 uninstall pipenv

 pip3 install pipenv

After either option 1 or 2, re-running the first time setup script from your SDK root directory (default ~/sphero-sdk-raspberrypi-python) is recommended:

./first-time-setup.sh

TimeoutError

The error message concurrent.futures._base.TimeoutError, typically means that the UART communication between RVR+/RVR and the Raspberry Pi is not working.

pi@raspberrypi:~/sphero-sdk-raspberrypi-python $ python3 getting_started/asyncio/leds/set_multiple_leds.py

Network available

Checking RVR firmware versions...

Traceback (most recent call last):

  File "getting_started/asyncio/leds/set_multiple_leds.py", line 16, in <module>

    loop

  File "/home/pi/sphero-sdk-raspberrypi-python/sphero_sdk/asyncio/client/toys/sphero_rvr_async.py", line 36, in __init__

    self._check_rvr_fw()

  File "/usr/lib/python3.7/asyncio/base_events.py", line 584, in run_until_complete

    return future.result()

  File "/home/pi/sphero-sdk-raspberrypi-python/sphero_sdk/asyncio/client/firmware/rvr_fw_check_async.py", line 30, in _check_rvr_fw

    rvr_nordic_version = await self.__rvr.get_main_application_version(target=SpheroRvrTargets.primary.value, timeout=3)

  File "/home/pi/sphero-sdk-raspberrypi-python/sphero_sdk/asyncio/client/toys/sphero_rvr_async.py", line 106, in get_main_application_version

    return await self._dal.send_command(**command_dict)

  File "/home/pi/sphero-sdk-raspberrypi-python/sphero_sdk/asyncio/client/dal/serial_async_dal.py", line 84, in send_command

    timeout=timeout

  File "/home/pi/sphero-sdk-raspberrypi-python/sphero_sdk/asyncio/server/handler/api_sphero_handler.py", line 191, in send_command

    await asyncio.shield(asyncio.wait_for(future, timeout=timeout))

  File "/usr/lib/python3.7/asyncio/tasks.py", line 423, in wait_for

    raise futures.TimeoutError()

concurrent.futures._base.TimeoutError

• Make sure your RVR+/RVR is turned on.

• Check your wiring. Review the hardware setup instructions for details. If you're sure you wired your Raspberry Pi to your RVR+/RVR correctly, try different jumper wires. A lot of jumper wires in the market are built to be inexpensive, and could be defective or get damaged during use.

Syntax Error (in a getting_started script or other known good script)

When you see a syntax error in a known good script, this could be a hint that you're using the wrong Python version. Python 2.x is commonly the default python on a Raspberry Pi, and is not compatible with our SDK (we require Python 3.5+).

# Using Python 2 by accident:

pi@raspberrypi:~/sphero-sdk-raspberrypi-python $ python3 getting_started/asyncio/leds/set_multiple_leds.py

  File "getting_started/asyncio/leds/set_multiple_leds.py", line 21

    async def main():

            ^

SyntaxError: invalid syntax

To make sure that you're using Python 3.x, call your scripts in the form

python3 <scriptname.py>

# Using Python 3 (script succeeded)

pi@raspberrypi:~/sphero-sdk-raspberrypi-python $ python3 getting_started/asyncio/leds/set_multiple_leds.py

Network available

Checking RVR firmware versions...

Checking CMS firmware versions...

Firmware check complete.