Environment Variables?

[gamename]

Hi,

Is there any way to pass environment variables to the micropython environment? I'm trying to avoid hard-coding wifi passwords in the code. If I could pass that as an env var, then I could just set the variable that way.

thank you

[vekunz]

I am not sure how such a thing could be possible. Since a Microcontroller has no operating system, any needed data has to be saved either directly in your code or in some other connected storage.

In the case of the Raspberry Pi Pico (I am sure it works with other microcontrollers also), some hacks exist to write data directly to the flash storage, but this is highly not recommended. I am currently creating a project where I need configuration data, also (including Wifi credentials). I am going to try to use an SD card for this.

Btw: Environment variables are the least secure way to store credentials ;)

[gamename]

@vekunz OK. So how can I pass sensitive info like SSIDs/Passwords without keeping it in source?

[vekunz]

I think the only good way (except in source code) is an SD card.

[vdavez]

I recently used this pattern:

• create a settings.py or config.py file
• add it to .gitignore
• define your variables on each line like SSID_NAME="Network Name"
• copy settings.py on to the device
• put import settings at the top of main.py

Hope this helps!