Electronics > Projects, Designs, and Technical Stuff
RaspberryPi overkill / ESP32 not quite enough
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Caesiumhydroxid:
Hello everybody!

As my title states: I am planning on doing a project which requires Wifi and Bluetooth (LE) but a raspi seems like it is an overkill and an esp32 is not quite powerful enough for the task. Since I am not too familiar with the options there are, I hope that maybe some of you may know a fitting device.

My Project involves:

* driving about 70 RGB-LED's
* driving an e-ink display
* getting data like Weather / Notifications / Calendar
* connecting to Wifi / communicating with Smartphone with Bluetooth (LE)
The main problem is that the ESP32 "only" has ~300kB RAM which will not be enough for my intetions. A typical calendar file has 100-400kB and also needs to get parsed which also needs some more memory. For managing all things and to be on the save side with filesizes I estimate that I need about 4MB of RAM (more is probably better). CPU wise there is not that much demand - so anything as powerful as an esp would do the job.

Do you know some Boards which lie "between" the Raspi and an ESP32 regarding CPU power and RAM size?

I am happy to get any advice! Since I am new to this Forum - sorry if I posted in the wrong spot or overlooked some information which would already solve my problem.

Thanks in advance

Caesiumhydroxid

sokoloff:
One approach is to do some of the heavy lifting/processing off box (on a VPS, server, or serverless function [AWS Lambda or equivalent]) and only use the ESP32 for the local part.

On the other hand, if you're making exactly one or two of these, just use an RPi and make it easy on yourself. :D
Frederir:
A small board based on AR9331 should do it.
There is many different modules based on this processors. https://www.8devices.com/ is one manufacturer, and they have other more powerfull modules too.
Scrts:
Well, you can always add SPI SRAM, e.g. 23LC1024. From there, either ESP32 works or you can look into CC3200/CC3220.
cv007:
Onion Omega2 - https://onion.io/omega2/

No bluetooth, though (but you have a usb host port at your disposal).

These are nice modules when you want the advantages of an os, but do not need/want the size/cost of a Pi type device.
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