Using Hass on Synology VMM & implications on serial port

[IoTPlay]

Hi, I install hassos on vmm on Synology. I want to connect to serial interface to enable modbus devices.

here is what I have done:

1. the serial interface is setup on the VMM,
2. I can test the serial interface by command in hass vmm terminal domes | grep tty which results in
   ch341-uart converter now attached to ttyUSB0
3. I setup pyscript up correctly, some Services I have - does execute

Until I want to run a pyscript that uses import serial.

I have imported the serial interface by hand with:

apk add --update py-pip
pip install serial

But when I run an app in pyserial (properly configured - with it registed in config.yaml)

I get import serial ^ ModuleNotFoundError: import of serial not allowed

Any ideas?

[IoTPlay]

And here is the app in pyscript, named init.py with the import that causes it:

#!/usr/bin/env python3
# -*- coding:utf-8 -*-

@service    # ("testpython.serialversion")
def testPythonSerial():
    import serial
    log.warning(serial.__version__)