espressif | all espressif stuff

I m working on an ESP32 project, where I m fetching some array value from a file that is saved in spiffs. After fetching the value in sending the raw value of IR using IRsend function and after that sending MQTT acknowledgement to aws. But at publishing time I m getting the error stack overflow error. Sending the acknowledgement

Using pin 26 for ADC seems to be discouraged in Toit.

From what I can see on https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/peripherals/adc.html pin 26 should have an ADC converter, so what is the reason for that?

A freind and I are working together on an ESP32 webserver, and we have hit a wall. My buddie has pretty much given up on it, and I am less skilled than him.

We have the following functions, which compile fine, but cause the ESP32 to crash. After lots of debugging I am pretty certain the crash occurs when trying to return c

I have written a base 64 encoding / decoding library for the Arduino IDE (yes, I am aware such libraries already exist. This is for my own education as much as anything practical). My target microcontroller is an Espressif ESP32.

In my base64 decoding function, the index variable i is affected by the presence of a Serial.println() debug statement. It is the strangest thing I have ever seen and I cannot figure out why it should make a difference if there is debug printing or not.

Using the test program base64.ino and the b64.cpp functions below, here are two samples of my serial output. In the first example, I'm using a Serial.println(i); in the function b64dec() just after the for loop. In the second example, the Serial.println(i); is commented out. That is the only difference and I get two drastically different results.

Am I missing something here? Is it a compiler optimization gone wonky? My understanding of C variable scoping is that there are only global, function, and parameter levels. The i in the for loop should be the same as the int i = 0; a few lines above it. I don't believe it's buffer eoverflow either, since the debugging output of 13 for the decoded length is accurate for a 12 character message and its NULL terminator.

This is what I expect to get any time I run it:

I am learning to write apps on ESP32 platform. When I was trying to compile my code, I got this error from linker:

undefined reference to `Serial_Init'

Where Serial_Init is a function declared in a file serial_cli.h which is in the same directory and workspace. What's more, I declared some macros there, and can use them no problem in my code, so I really don't understand where the error comes from. Here's serial_cli.h:

I just bought an ESP32-S, which looks like this : https://99tech.com.au/product/esp32-s-ai/, except the one I bought only have the writing "ESP32-S" and the espressif symbol instead of AI thinker symbol.

I have been searching the internet for a week for a specific tutorial for this "board" and found nothing. what I have found is mostly that there is ESP32, ESP32-S2, ESP32 WROOM, ESP32 WROVER... but which one is my esp32-S? is it the same with esp32 or is it the esp32 wroom or something else? if I am going to program this using platformio, which board should I pick? or does it matter which board?

thank you in advance

I'm setting up Linux device to act as BLE host, and ESP32 to work as a BLE controller over UART.

I'm using BlueZ v5.55, with btattach and bluetoothctl utilities, and bluetoothd running in the background. However, after finishing the setup bluetoothctl still says No default controller available.

I'm currently working with ESP-NOW with the esp-idf. Below is a snippet from their espnow examples. I need some help in identifying what does this line means, but I'm not quite sure what to google. Can someone point me in the correct direction?

I'm trying to CMake a project. I'm new to using it so I guess it must be very obvious for someone familiar with CMake: In the main folder where main.c is residing I'm including