Hi, i'm working something similar, but the data is audio signal, which means i need minimum 12 bites resolution by ADC(1), and a sampling rate 441000 Hz, the idea is to listen almost in real time you understand, now i'm using UDP but i got a lot of delay, i don't know if i'm not implementing right or this protocol isn't aproppiedied.
I'm gonna try it with Esp-Now, but what do you recommend for this application, for example i've seen the ESP-CAM send the video low resolution but faster and i don't know what protocol use, i saw the library but i don't understand it.
Code: Select all
#include <WiFi.h>
#include <WiFiUdp.h>
#include "soc/timer_group_struct.h"
#include "soc/timer_group_reg.h"
const char* ssid = ".......";
const char* password = ".......";
uint16_t analog=0;
uint8_t data1[1460]; //data buffer
uint8_t data2[1460]; //data buffer copy
bool ready1=false;
WiFiUDP Udp;
TaskHandle_t Task1, Task2;
//SemaphoreHandle_t baton; //version with semaphore
void setup() {
Serial.begin(115200);
Serial.println();
WiFi.mode(WIFI_STA);
WiFi.begin(ssid, password);
while (WiFi.status() != WL_CONNECTED) {
//Serial.print(".");
delay(500);
}
//baton = xSemaphoreCreateMutex(); //version with semaphore
xTaskCreatePinnedToCore(codeForTask1, "Task1", 10000, NULL, 1, &Task1, 1);
delay(500);
xTaskCreatePinnedToCore(codeForTask2, "Task2", 10000, NULL, 1, &Task2, 0);
delay(500);
}
void loop() {
vTaskDelete(NULL);
}
void codeForTask1( void * parameter )
{
for (;;) {
TIMERG0.wdt_wprotect=TIMG_WDT_WKEY_VALUE; //to avoid use vTasKdelay(1)
TIMERG0.wdt_feed=1;
TIMERG0.wdt_wprotect=0;
int x=0;
for(int i=0; i<730;i++){ //buffer 1460, but real 730 (the analogic data 16 bits)
int old=micros();
analog = analogRead(34); //the audio signal
//analog2=analog;
data1[x]=(uint8_t(analog)); //take 8 bits
data1[x+1]=(uint8_t(analog>>8)); //take the last 8 bits
x=x+2;
while(micros()-old<20); //22uSec = 1Sec/44100Hz - 2uSec almost the sampling rate
}
while(ready1==true); //wait to make a copy data buffer
}
}
void codeForTask2( void * parameter )
{
for (;;) {
ready1==true;
for(int i=0; i<1460;i++){ //copy of buffer
data2[i]=data1[i];
}
ready1==false;
Udp.beginPacket("192.168.0.106", 4321);
for(int i=0; i<1460;i++){ //data to send
Udp.write(data2[i]);
}
Udp.endPacket();
}
}
