ESP32 S2: pinout, specs and Arduino IDE configuration – 1

by Renzo Mischianti · Published 1 December 2020 · Updated 11 February 2024

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ESP32 S2 pinout, specs and Arduino IDE configuration main

Esp32 s2 details

In this article, I will present the esp32 s2 family of devices, these devices are under development and some parts may be modified in the future.

In the past 2019 new ESP32 board was born, the s2 family. At first, only the ESP-IDF platform was supported, but now the version for the Arduino ecosystem is also quite mature, although the official version for the Arduino IDE has not yet been released.

On the ESP32-S2, there is no Bluetooth or Ethernet MAC, but it includes new interesting features in order to be more attractive to the IoT device market.
It has a lower cost than the ESP32 and has USB-OTG, LCD, and camera support.
The ESP32-S2 can also dynamically turn off the Wi-Fi transceiver when not in use to save power.

It also now features a powerful single core, so many programming problems such as CPU resource management are solved.

Here the development modules ESP32 S2 Saola 1 - Ai-thinke ESP-12K - ESP32 S2 Mini

Specs

Remember that there are many variations of this device, some have specialized functions, but here we put a basic description of the specifications.

CPU and Memory
- Xtensa® single-core 32-bit LX7 microprocessor, up to 240 MHz
- 128 KB ROM
- 320 KB SRAM
- 16 KB SRAM in RTC
- Embedded flash (None, 2Mb or 4Mb)
- SPI/QSPI/OSPI supports multiple flash and external RAM chips
Wi-Fi
- IEEE 802.11 b/g/n-compliant
- Supports 20 MHz, 40 MHz bandwidth in 2.4 GHz band
- Single-band 1T1R mode with data rate up to 150 Mbps
- WMM
- TX/RX A-MPDU, RX A-MSDU
- Immediate Block ACK
- Fragmentation and defragmentation
Advanced Peripheral Interfaces
- 43 × programmable GPIOs
- 2 × 12-bit SAR ADCs, up to 20 channels
- 2 × 8-bit DAC
- 14 × touch sensing IOs
- 4 × SPI
- 1 × I2S
- 2 × I2C
- 2 × UART
- RMT (TX/RX)
- LED_PWM, up to 8 channels
- 1 × full-speed USB OTG
- 1 × temperature sensor
- 1 × DVP 8/16 camera interface, implemented using the hardware resources of I2S
- 1 × LCD interface (8-bit serial RGB/8080/6800), implemented using the hardware resources of SPI2
- 1 × LCD interface (8/16/24-bit parallel), implemented using the hardware resources of I2S
Security
- Secure boot
- Flash encryption
- 4096-bit OTP, up to 1792 bits for users
- Cryptographic hardware acceleration:
  - AES-128/192/256 (FIPS PUB 197)
  - Hash (FIPS PUB 180-4)
  - RSA
  - Random Number Generator (RNG)
  - HMAC
  - Digital signature

Pinouts

This device is very powerful, and you can see there are capacitive touch pins, more than one UART, and various analog pins.

ESP32 S2 Saola 1MI

Equipped with ESP32-S2-WROVER-I, there is 2 version of this board, the 1M and 1MI. The only difference is that the 1MI has an IPEX antenna.

This board has three add-ons to the basic configuration: 4MB SPI flash, 2MB PSRAM and an addressable RGB LED (WS2812).

ESP32 S2 Saola 1MI pinout mischianti low

ESP32 S2 Saola 1MI detail and high resolution pinout image

Ai-thinker ESP-12K

Ai-thinker uses an SoC from Ensink Technology that has the same specs as ESP32-S2-WROVER, this board has a simple status led.
There are 2 versions of this board:

ESP-12K(00) without PSRAM
ESP-12K(08) with 8MByte PSRAM

Ai-thinker ESP 12K ESP32 S2 pinout high resolution image

Arduino IDE configuration (Using the updated JSON dev)

Add boards to the Arduino IDE

First, you need to add the esp32 URL descriptor to your IDE

https://raw.githubusercontent.com/espressif/arduino-esp32/gh-pages/package_esp32_dev_index.json

Go to File -> Preferences and add the URL to “Additional Boards Manager URLs“

Arduino IDE esp32 additional board manager

Then you have to add the new board to the Board Manager

The card to select is esp32

Arduino IDE esp32 boards manager dev for s2 c3 s3

It is important that you choose a version of the esp32 core> = 2.

Arduino IDE esp32 select board s2 on menu

Arduino IDE configuration (manual installation of esp32s2 branch) (Deprecated)

The branch was changed in esp32c3 or Master no more esp32s2.

As you can understand from the title, there is not yet a simplified procedure, so we will have to take several steps to be able to use our esp32 s2 on the Arduino IDE.

Install standard ESP32 cards from the IDE card manager

First, you must add the esp32 URL descriptor to your IDE

1 2	`http://arduino.esp8266.com/stable/package_esp8266com_index.json` `https://dl.espressif.com/dl/package_esp32_index.json`

Go to File –> Preferences and add the URL on “Additional Boards Manager URLs”

Then you must add a new board in Boards Manager

The board to select is esp32

Download the manager from the ESP32s2 branch

The branch was changed in esp32c3 and master no more esp32s2.

But now we have installed the stable branch of the master on the IDE and there is no esp32 s2 implementation.

ESP32 S2 download Arduino IDE boards implementation

So you must download this branch

ESP32s2 GitHub branch or Master

then you have to open the path where the Arduino IDE stores its preferences:

ESP32 S2 download Arduino IDE preferences folder

Now find the esp32 implementation. In my case it’s the folder

1	`<Arduino IDE preferences path>\packages\esp32\hardware\esp32\1.0.4`

the result becomes

1	`C:\Users\renzo\AppData\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4`

First create a copy of the folder packages\esp32 if you want revert the operation in the future.

Than open the zip of the branch and copy the same file and folder to the esp32 path

ESP32 S2 copy branch ESP32S2 to esp32 implementation

Now you can find the ESP32s2 Dev Kit implementation on your Arduino IDE:

ESP32 S2 board manager ESP32s2 Dev Module

But you can’t compile and upload nothing because you need 2 other updated tool.

Download xtensa-esp32s2-elf

But nothing can work this because this board not use xtensa-esp32-elf but xtensa-esp32s2-elf, you must download It from here:

IDF downloadable tools

The version for my operating system, Windows 10, is win64.

Download ESPTools

And you need the lastest version of esptool, and you can check the last version from here.

GitHub ESPTools

The first version that support ESP32 s2 is 3.0.0, and we are going to download that version from this link.

ESPTools 3.0.0

Put all togeder

Now you must copy in the

1	`<Arduino IDE preferences folder>\packages\esp32\hardware\esp32\1.0.4\tools`

this two tools.

ESP32 S2 install xtensa-esp32s2-elf and esptool 3.0.0

Now your IDE work correctly, I’m moved.

Your first ESP32 s2 sketch

ESP32 S2 Saola 1MI

Now we are going to manage the addressable RGB led (Addressable RGB LED (WS2812), driven by GPIO18) installed on the board.

You need to install Adafruit_NeoPixel.h library from libraries manager.

Here is the simple sketch:

/*
 *  Here a simple sketch to test the upload of ESP32 S2 Saola 1MI.
 *  The addressable RGB LED (WS2812), driven by GPIO18 need
 *  Adafruit NeoPixel library
 *  by Mischianti Renzo <https://mischianti.org>
 *
 *  https://mischianti.org/
 *
 */
 
#include <Adafruit_NeoPixel.h>
#define PIN 18
#define NUMPIXELS 1
Adafruit_NeoPixel pixels(NUMPIXELS, PIN, NEO_GRB + NEO_KHZ800);
 
enum {NONE, RED, GREEN, BLUE};
int ledColor = NONE;
 
void setup()
{
  pixels.begin();
}
 
void loop()
{
  switch (ledColor) {
    case NONE:
      pixels.setPixelColor(0, pixels.Color(0, 0, 0));
      pixels.show();
      break;
    case RED:
      pixels.setPixelColor(0, pixels.Color(20, 0, 0));
      pixels.show();
      break;
    case GREEN:
      pixels.setPixelColor(0, pixels.Color(0, 20, 0));
      pixels.show();
      break;
    case BLUE:
      pixels.setPixelColor(0, pixels.Color(0, 0, 20));
      pixels.show();
      break;
    default:
      break;
  }
 
  ledColor++;
  if (ledColor == 4) {
    ledColor = NONE;
  }
 
  delay(1000);
}

ESP32-S2-Saola-1MI Led RGB animation test

Ai-thinker ESP-12K

Now a blink sketch for this microcontroller:

/*
 *  Here a simple sketch to test the upload of Ai-thinker ESP-12K.
 *  by Mischianti Renzo <https://mischianti.org>
 *
 *  https://mischianti.org/
 *
 */
 
#define LED_BUILTIN 2
 
// the setup function runs once when you press reset or power the board
void setup() {
  // initialize digital pin LED_BUILTIN as an output.
  pinMode(LED_BUILTIN, OUTPUT);
}
 
// the loop function runs over and over again forever
void loop() {
  digitalWrite(LED_BUILTIN, HIGH);   // turn the LED on (HIGH is the voltage level)
  delay(1000);                       // wait for a second
  digitalWrite(LED_BUILTIN, LOW);    // turn the LED off by making the voltage LOW
  delay(1000);                       // wait for a second
}

Both custom and standard installations running on your Arduino IDE

Many people ask me how to switch between the new and old installation easily. Here is a small guide.

Rename the new esp32s2 installation inside <Arduino IDE preferences folder>/preferences from esp32 in esp32s2 and the “old” standard directory in esp32.

Now you have the previous installation in esp32 (like normal) and esp32s2 the GitHub installation.

Add to “Additional Boards Manager URLs” a fake URL like

1	`https://dl.espressif.com/dl/package_esp32s2_index.json`

Now duplicate from <Arduino IDE preferences folder> the file package_esp32_index.json and rename It in package_esp32s2_index.json.

In the new file change name in esp32s2 like so:

{
  "packages": [
    {
      "name": "esp32s2",
      "maintainer": "Espressif Systems",

Now go to

1	`<Arduino IDE preferences folder>\packages\esp32s2\hardware\esp32\1.0.4`

open file platform.txt and change the first line from name=ESP32 Arduino in name=ESP32s2 Arduino. Restart the IDE.

ESP32 S2 show double installation in your Arduino IDE

Thanks

Support forum

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Tags: Arduino IDE esp32s2 pinout Tutorial

Joao Fortes says:

21 January 2021 at 13:41

Thank you! Worked like a charm with ESP32-S2-Saola-1

Reply
- Renzo Mischianti says:
  
  21 January 2021 at 14:08
  
  Thanks to you for your feedback..
  
  Bye Renzo
  
  Reply
Claudia says:

25 January 2021 at 19:19

Aaaaand it worked fine with Ai-thinker ESP-12K too !
Thank you , now I have to try to compile EspEasy on it and that will be… something else.
Thank you for your nice work and step by step.

Reply
- Renzo Mischianti says:
  
  25 January 2021 at 21:42
  
  Hehehe… Good, keep us updated on how the compilation is progressing.
  Bye Renzo
  
  Reply
Kadir says:

9 February 2021 at 10:06

I have some problem with wifi connection. I did all the steps as described but when I upload advanced web server example into s2, Wifi fails sometimes connected sometimes take too long time to connect, that is not stable as in the esp32. What might be the problem ?

Reply
- Renzo Mischianti says:
  
  9 February 2021 at 11:17
  
  Hi Kadir,
  I think that the library used isn’t updated for esp32 s2 or there is a bug, but if you open an issue on library creator he’s going to fix It.
  Bye Renzo
  
  Reply
D Ziegl says:

1 March 2021 at 19:41

Thanks for this awesome Tutorial, works great for ESP32S2, now I can no longer use IDE for ESP32. (xtensa-esp32-elf-g++: error: unrecognized command line option ‘-mfix-esp32-psram-cache-strategy=memw’)
I have moved copies of folders back and forth, to allow working with both processors, but this is tedious. Is there a way you are aware of to have the IDE work for both the ESP32 and the ESP32S2? (Or, at least, do you know what the minimum list of files to move back & forth are?)

Reply
- Renzo Mischianti says:
  
  1 March 2021 at 20:27
  
  Hi ziegl,
  I think you can configure the esp32 folder, but now I have arduino ide to compile esp32s2 and sloeber ide to write code and compile esp32.
  I don’t check alternative solution.
  Bye Renzo
  
  Reply
D Ziegl says:

1 March 2021 at 20:04

Sorry, I also meant to mention, the Pinout picture you post on this web page, lists Pin 36 as FSPICLK(which is correct) and also as MISO, which it is not. Consequntially, Pin 37 is Listed as FSPIQ and SCK, again, FSPIQ is correct, but this is actually the MISO Pin. Obviously, correct me if I am wrong.

Reply
- Renzo Mischianti says:
  
  1 March 2021 at 21:58
  
  Yes, I’m wrong, the pins are
  static const uint8_t TX = 43;
  static const uint8_t RX = 44;
  
  static const uint8_t SDA = 8;
  static const uint8_t SCL = 9;
  
  static const uint8_t SS = 34;
  static const uint8_t MOSI = 35;
  static const uint8_t MISO = 37;
  static const uint8_t SCK = 36;
  
  Thanks i’m going to fix.
  
  Reply
  - D Ziegl says:
    
    2 March 2021 at 03:54
    
    I was hoping I was wrong, I have been looking for Pinout info on the ESP-12K, & nearly everything I see has been copied from your site. So, a lot of others will see the misinfo as well.
    
    I did figure out a solution for quickly switching back and forth between the ESP32 & ESP32S2, in the Arduino IDE.
    Install ESP32, make a copy of the 1.0.4 folder, name it 1.0.4ESP32, Put 1.0.4ESP32 in your appdata/local folder.
    
    Install ESP32S2 (Make a copy in case anything goes wrong later.
    
    Create 2 batch files, with the following code:
```
@echo off

cd %USERPROFILE%\appdata\Local

IF EXIST "1.0.4ESP32\" (
move %USERPROFILE%\appdata\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4 %USERPROFILE%\appdata\Local\1.0.4ESP32S2

move %USERPROFILE%\appdata\Local\1.0.4ESP32 %USERPROFILE%\appdata\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4

ren %USERPROFILE%\desktop\ESP32S2.txt ESP32.txt


ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.

ECHO Files Copied!


pause
) ELSE (
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.

  ECHO. Something Bad Happened!
  pause
)

Call this ESP32.bat, put it on your desktop.


@echo off

cd %USERPROFILE%\appdata\Local

IF EXIST "1.0.4ESP32S2\" (
move %USERPROFILE%\appdata\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4 %USERPROFILE%\appdata\Local\1.0.4ESP32

move %USERPROFILE%\appdata\Local\1.0.4ESP32S2 %USERPROFILE%\appdata\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4

ren %USERPROFILE%\desktop\ESP32.txt ESP32S2.txt

ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.

ECHO Files Copied!

pause
) ELSE (
  ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO Something Bad Happened!
  pause
)
```
    Call this ESP32S2.bat, put it on your desktop.
    
    Finally, create a text file called ESP32S2.txt, and put this file on your desktop as well.
    
    You will be starting with the ESP32S2 files installed, and the copy of the 1.0.4 folder for ESP32 (named 1.0.4ESP32, and copied ito your appdata/local folder) , so, when you run the ESP32.bat file, it will “MOVE” your ESP32S2 files to the appdata\local folder, Re-naming the Folder to “1.0.4ESP32S2”, then will “MOVE” your “ESP32” Folder to the correct location, and finally rename your desktop “ESP32S2.txt” file to “ESP32.txt”. (so that you can tell at a glance at the name of this text file whether you are setup for ESP32, or ESP32S2.)
    
    The “Magic” here, is that a “move” command in Windows does not actually move the files, it merely writes a new location for the files to the NTFS table, so, moving all these files happens nearly instantaneously.
    
    The other nice thing about this method, if you apply any updates to the library files stored in appdata, the changes are all automatically saved to each “Instance” of the IDE separately. (I store any library files I add, on a separate Drive, but otherwise, your Library files would be double the normal storage space)
    
    If this isn’t clear, feel free to ask questions. Also, I just set this up minutes ago, so, no real testing per se, but, it seems to work as expected.
    
    Reply

D Ziegl says:

2 March 2021 at 04:06

I see the extra space was stripped out of my comment, so, all formatting is gone. Is there a way to post the Batch code with the correct formatting? Or, a way to upload a properly formatted file?

Maybe this works?

@echo off
 
cd %USERPROFILE%\appdata\Local
 
IF EXIST "1.0.4ESP32\" (
move %USERPROFILE%\appdata\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4 %USERPROFILE%\appdata\Local\1.0.4ESP32S2
 
move %USERPROFILE%\appdata\Local\1.0.4ESP32 %USERPROFILE%\appdata\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4
 
ren %USERPROFILE%\desktop\ESP32S2.txt ESP32.txt
 
 
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
 
ECHO Files Copied!
 
 
pause
) ELSE (
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
 
  ECHO. Something Bad Happened!
  pause
)

@echo off
 
cd %USERPROFILE%\appdata\Local
 
IF EXIST "1.0.4ESP32S2\" (
move %USERPROFILE%\appdata\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4 %USERPROFILE%\appdata\Local\1.0.4ESP32
 
move %USERPROFILE%\appdata\Local\1.0.4ESP32S2 %USERPROFILE%\appdata\Local\Arduino15\packages\esp32\hardware\esp32\1.0.4
 
ren %USERPROFILE%\desktop\ESP32.txt ESP32S2.txt
 
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
 
ECHO Files Copied!
 
pause
) ELSE (
  ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO.
ECHO Something Bad Happened!
  pause
)

Renzo Mischianti says:

2 March 2021 at 08:53

Hi Ziegl,
thanks again for your report on pins issue, I add a little guide on this article on how to have the 2 installation active at the same time in your Arduino IDE.
Give me a feedback on It.
Bye Renzo

Reply
- D Ziegl says:
  
  3 March 2021 at 14:16
  
  I must not be reading your instructions correctly, I screwed up the first time, & removed Arduino completely, & re-installed.
  I think I followed your instructions the second time, but, still not working. I ended up with what looks like an ESP32 only (No ESP32S2) but, get the error
  “Error downloading https://dl.espressif.com/dl/package_esp32s2_index.json” when I try to compile an ESP32 project.
  
  Reply
  - Renzo Mischianti says:
    
    3 March 2021 at 14:26
    
    Hi Ziegl,
    you must download esp32, than as described in the tutorial copy the standard folder like esp32_old.
    do the path for esp32s2 on esp32 folder, at the end rename es32 in esp32s2 and the esp32_old in esp32.
    
    The error in download is normal, but there isn’t problem about that.
    I think you mean this.
    Bye Renzo
    
    Reply

JC says:

24 March 2021 at 07:41

I’ve been struggling with esp boards for a while, and your step-by-step tutorial really helped. Thank you very much.

Renzo Mischianti says:

24 March 2021 at 08:30

Hi JC,
thank you very much for your feedback, I’m happy to help you.
Bye Renzo

Reply

Djamel F. says:

31 March 2021 at 10:20

Hello,

Thank you for sharing. Thanks to you I’m able to flash the example you provide on my board.

However I’m experiencing some issue when I’m trying to compile a painlessmesh example code. Here is the warning:

C:\Arduino\libraries\Painless_Mesh\src/painlessmesh/router.hpp:162:26: warning: lambda capture initializers only available with -std=c++14 or -std=gnu++14

Do you have an idea how to manage to use the c++14 compiler

Renzo Mischianti says:

31 March 2021 at 11:33

You can try to change the file platform.txt setting in this path

1	`<preferences path>\packages\esp32\hardware\esp32\1.0.5`

and the c extra_flag

# These can be overridden in platform.local.txt
compiler.c.extra_flags=
compiler.c.elf.extra_flags=
compiler.S.extra_flags=
compiler.cpp.extra_flags=
compiler.ar.extra_flags=
compiler.objcopy.eep.extra_flags=
compiler.elf2hex.extra_flags=
compiler.libraries.ldflags=

with something like

1	`-std=c++14`

Give me a feedback, if I had some time I try to do the change in my env.

Bye Renzo

Djamel F. says:

31 March 2021 at 20:21

Hello again,

I have checked in my platform.txt file (haven’t found the platform.local.txt) and change the following variable:

from compiler.cpp.flags.esp32=-std=gnu++11 to compiler.cpp.flags.esp32s2=-std=gnu++14 ………………
from compiler.cpp.flags.esp32s2=-std=gnu++11 to compiler.cpp.flags.esp32s2=-std=gnu++14 …………..

I’m not sure if it was what you were suggesting anyway since my warning disapear 🙂

Thanks,

Djamel

Reply
- Renzo Mischianti says:
  
  31 March 2021 at 22:31
  
  Hehehehhe.. The important thing is the result.
  Bye Renzo
  
  Reply

Djamel F. says:

2 April 2021 at 18:20

Hello,
For info the ESP32s2 GitHub branch is not anymore available :/

Reply
- Renzo Mischianti says:
  
  2 April 2021 at 20:10
  
  Hi Djamel,
  It’s true, the branch It’s moved on https://github.com/espressif/arduino-esp32/tree/idf-master .
  Thanks to alert me Renzo
  
  Reply
  - Esteban says:
    
    13 April 2021 at 22:51
    
    The link does not work, I am assuming you mean that it is just in the Master branch? Also when I try to run any sort of wifi connection, it simply loads forever. A Question: if the wifi does not have a password to I just remove the password part?
    like this (“ssid”) instead of (“ssid”, “password”)
    
    Reply
    - Renzo Mischianti says:
      
      14 April 2021 at 07:55
      
      Hehehe, they change the repository again now is
      
      1
      https://github.com/espressif/arduino-esp32/tree/esp32c3
      
      but now It’s also support on master.
      
      If you add the link in this comment you have the support for esp32c3 and esp32s3 also.
      Bye Renzo
      
      Reply
SLevin says:

8 April 2021 at 19:08

Great explanation and video, man, well done! Thanks a lot

Reply
- Renzo Mischianti says:
  
  8 April 2021 at 22:54
  
  Thanks to you for your support.
  
  Reply
Théo Gaboreau says:

28 May 2021 at 22:44

Hi, I folowed the tutorial, all seems to be working but when I compile code I’m getting this error :
A fatal error occurred: Segment loaded at 0x3f000120 lands in same 64KB flash mapping as segment loaded at 0x3f000020. Can’t generate binary. Suggest changing linker script or ELF to merge sections.
exit status 2
C:\Program Files\WindowsApps\ArduinoLLC.ArduinoIDE_1.8.49.0_x86__mdqgnx93n4wtt\arduino-builder a retourné 2

It seems that the xtensa version create an issue but I don’t know how to fix it

Reply
- Renzo Mischianti says:
  
  29 May 2021 at 07:30
  
  Hi Theo,
  It looks like a bad partition table, try to change It.
  Bye Renzo
  
  Reply
  - Théo Gaboreau says:
    
    29 May 2021 at 21:54
    
    Hi, Which partition do I have to change ? and how ?
    
    Reply
    - Renzo Mischianti says:
      
      29 May 2021 at 22:48
      
      Hi Theo,
      I don’t know what did you do but I’m goolging something and I find this
      
      You have an ‘.irom.text’ section in your program but it is not placed anywhere in the linker script.
      You need to remove function attributes that assign functions to this section. My guess is that you are moving code from the 8266 and use something like ICACHE_FLASH_ATTR.
      
      I can’t give you more help with the information you gave me, if you don’t find the solution open a topic in the forum and we try to help you to solve this issue.
      
      Bye Renzo
      
      Reply
Lakshminarayana Kadechur Somashekhar says:

5 January 2022 at 10:16

Hi Renzo,
I am working on SPI for esp32 S2 dev module, the SPI Pins (SCK-36,MISO-37,MOSI-35,SS-34) used are shown, but i would like to use the Two SPI’s available on S2 module. i tired with defining the SPI type as shown below:
SPIClass spiBus1 = SPIClass(HSPI); // SPI for Display (SCK-36,MISO-37,MOSI-35,SS-34)
SPIClass spiBus2 = SPIClass(VSPI); // SPI for SD card (SCK-12,MISO-13,MOSI-11,SS-10)

But to my hard luck this doesnt work with S2 module.
so could you please guide me on how to use two SPI bus of esp32 s2 module in Arduino ide.

With Regards
Lakshminarayana KS

Reply
- Renzo Mischianti says:
  
  5 January 2022 at 11:37
  
  Hi Lakshminar,
  Open a topic on Forum and post your code; we will check where the problem is.
  Bye Renzo
  
  Reply