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jczic / ESP32-MPY-Jama

v1.2 - UI tool for manage Espressif ESP32 microcontrollers with embedded MicroPython for MacOS, Windows and Linux: mini IDE, files manager, REPL, real time dashboards (sys/net), advanced features (gpio/mp3/leds/...)
https://github.com/jczic/ESP32-MPY-Jama
MIT License
424 stars 25 forks source link

BLE Scan for ESP32 without PSRAM #13

Closed biemster closed 1 year ago

biemster commented 1 year ago

The BLE Scan Jama Func now errors out on for example a ESP32-WROOM-32 (which might be one of the more widely used ones?), with

MemoryError: memory allocation failed, allocating 136 bytes

because it does not have PSRAM on board (only about 100KB RAM free). However, simple BLE scans like in https://gist.github.com/biemster/801c25efc1d0ca9ea28ba39781aba2aa work fine.

Is it possible to reduce the memory footprint in the Func so it runs on those low RAM ESP32s?

biemster commented 1 year ago

I'm wondering actually how a 32KB script can fill 100KB of RAM, while the included gist runs the same BLE code but fits?

biemster commented 1 year ago

Abolishing import hexlify did not seem to have any effect, neither did making all the constants actually micropython.const

biemster commented 1 year ago

splitting BLE Scan.py in two; just the Jama Func and bleAdvReader.py which is referenced in the source, actually makes it work. Do Jama Funcs have some support for this? I really like the idea of the Funcs!

biemster commented 1 year ago

Also, the scanner is missing many advertisements. I'm working on something that sends an adv every 500ms, and the current Func only catches one or two during it's 7 seconds scanning cycle if it's lucky. I think the duty cycle should be optimised.

jczic commented 1 year ago

Hello @biemster, That's right and I'm working on this problem because it doesn't specifically concern the BLE scanner but the way JAMA-Funcs run. Indeed, during the transmission of the code and its "real-time" execution, a lot of memory is reserved and I am looking for this problem. I agree with you about the scanner, the base is quite simple in this little example but the messages are supposed to indicate the different data types. I'll keep you posted (you'll be automatically notified in a future release via the software/GitHub). Thanks to you.

jczic commented 1 year ago

Hi @biemster, the Jama Funcs memory problem is fixed in the latest repo sources but not in the releases (binaries). It will be in the next release. :) (commits 3e7a2b56e3a99f958a5cf9386989ce585fdb83d5 and e5a3192802c06590767f418d31ff881e1b7f7513)