Save persistently

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1

Hello everyone,

a fellow student and I are trying to develop a firewall with an ESP32-wroom32 under RIOT. It should filter very simple UDP and TCP packets per IP, port and direction. Writing, deleting and changing rules will be done via a self-written API. Everything works great, but we can’t get the rules to be saved after a restart. The library provided by RIOT is causing problems. Has anyone had experience with saving in general? Btw the ESP32 doesn’t have an EEPROM. It does not have to be a solution from RIOT directly, it is also sufficient if the solution is so general that it can be used under RIOT and under different microcontrollers.

Many thanks in advance and best regards

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2

if there is no EEPROM/flash that you can use, how do you expect to save the rules?

The ESP32 series do have writeable flash, and I think I’ve used littlefs on it, but I couldn’t swear to that point at 6pm on a Friday.

3

Thanks for the comment. The ESP has a flash drive but no EEPROM. Litlefs2 was causing mounting issues, as were spiffs. That’s why I’m here. Also for future comments, please no theoretical approaches/solutions. Just actual solutions and possibly the method used to implement them. We may have overlooked something. Thanks in advance.

4

Welcome to the RIOT community.

Which library are you referring to? Can you share the errors you were getting?