Olimex

Why ESP32C5?

I’m researching hardware options for an upcoming project, and the ESP32 family appears to be the best fit for our current requirements.

For years, a major drawback of Espressif chips was limited support to 2.4GHz WiFi only. Why does this matter? Having a 2.4GHz device on a WiFi network degrades performance for all other devices, forcing users to set up separate WiFi routers just for 2.4GHz devices. Additionally, the initial configuration proved frustrating—when your phone is on 5GHz, the ESP Touch protocol doesn’t work reliably.

During the past weeks i’ve worked on getting the FOTA upgrades work on the 2MB boards by Olimex.

The wonderful esp-link project by Thorsten von Eicken was a great example of  two things:

1. How to concatenate the espfs filesystem image with the firmware images.
2. How to properly write a new image to the flash.

It was a nice example to start with.

So after a lot of fiddling with  Makefiles, cgi routines and esptool  – i’ve finally got the OTA working.