Many many thanks for your information. I am rewriting the code using jetpack compose and I will use what you suggest.
I was reading the description

https://developer.android.com/develop/connectivity/wifi/wifi-aware

and can even limit connection by distance to connection peer

The Wi-Fi RTT API ...

Bluetooth is not what I need I will try to set up a peer to peer in android and Use normal wifi in ESP32. Android can communicate like this with Iphones, I phones don't have nearby devices but anyway can be connected as peer to peer using normal wifi. I will find out. Wifi can be used with more ...

Thanks. I supposed that using the same protocol CCMP would be possible. Do you know any other way to connect them peer to peer ? Using normal WIFi is this possible?

Thanks. I supposed that using the same protocol CCMP would be possible. Do you know any other way to connect them peer to peer ? Using normal WIFi is this possible?

I did a similar question on Friday and disappear. Was more detailed the explanation.

I need to communicate an Android Phone with an Esp32. I am trying to use ESP NOW. Android use a socked to send and receive data as the only way, needs a mac address and a local IP. Have sense if it necessary more ...

I am trying to connect an Android Phone to an Esp32 I am Thinking in use peer to peer direct Wifi.
Esp32 Idf have the ESP NOW that have functions to send and receive data. But Android, use WIFI direct API, and don't have functions to send data by use a Java Socket which need an address and handle ...

I did this is the start up of the program then all is deleted


void display_allocation(void){

// Allocate memory for each row in PSRAM
for (int i = 0; i < ROWARRAY; i++) {
background_pointers[i] = (uint16_t*)heap_caps_malloc(COLARRAY * sizeof(uint16_t), MALLOC_CAP_SPIRAM | MALLOC_CAP_8BIT);
if ...

The circuit that control the es32 is this

https://drive.google.com/file/d/1SEHRKZ ... drive_link

Many thanks for your help. I found another solution searching on the web, that is do an array of pointers (see background.c int the below github link). I am making my first program. You can see the solution.

The program is this

https://github.com/DarioLobos/Battery-Charger-and-converter-ESP32 ...

I am doing a program for an Esp32, I am new in this. I did an array of two dimensions for storage the background of an small Display. I will use it to stream buffer all. Take some frames small where data change and using a font bit map replace uint16_t 565 pixel by bit points in the small frame. The ...