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

Daniel Powell danielvieway at hotmail.com
Sun Sep 20 21:36:16 BST 2020

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.

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?



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