[chbot] Does anyone know how much free memory an ESP32 has?

[Charles Manning]

Thanks all

It sounds like there will be enough for my purposes (~150kB RAM + ~40kB
code).

On Mon, Sep 21, 2020 at 9:22 AM Andrew Dachs <dachsa492 at gmail.com> wrote:

> Sounds about right though I’m not sure you can go over the 1MB boundary
> with code. Ive not hit that yet so haven’t dug too deep. You can use it for
> filesystem but think code requires cached pages that is not in the arduino
> framework.
> Andy
>
> Sent from my iPhone
>
> On 21/09/2020, at 8:36 AM, Daniel Powell <danielvieway at hotmail.com> wrote:
>
> 
>
> While very rudimentary this may give you some impression.
>
> Using the Arduino IDE and WiFi library, specifically the WiFiClientTest
> (so full stack), no OTA on a 2mb esp32 pico (M5StickC).
>
>
> Sketch uses 633974 bytes (30%) of program storage space. Maximum is
> 2097152 bytes.
>
> Global variables use 38760 bytes (11%) of dynamic memory, leaving 288920
> bytes for local variables. Maximum is 327680 bytes.
>
> Regards,
>
> Daniel.
>
>
>
> *From:* Chchrobotics <chchrobotics-bounces at lists.ourshack.com> *On Behalf
> Of *Charles Manning
> *Sent:* Monday, 21 September 2020 7:50 AM
> *To:* Christchurch Robotics <chchrobotics at lists.ourshack.com>
> *Subject:* [chbot] Does anyone know how much free memory an ESP32 has?
>
>
>
> Hi All
>
>
>
> I expect there are some C-using ESP32 programmers out there...
>
>
>
> I am thinking of doing some experiments with the ESP32 that will indeed
> quite a lot of RAM.
>
>
>
> The ESP32s have 512bB of RAM (+ 8kB RTC RAM). but substantial amounts of
> that are used by the wireless stack(s).
>
>
>
> DOes anyone know how much is left for application use?
>
>
>
> Thanks
>
>
>
> CHarles
>
>
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