ESP8266 Community Forum

- Wed Dec 09, 2020 12:07 pm #89726 Hi,

I made a simple ring buffer class and am unable to access the ESP8266HTTPClient stream in order to reduce the stream.read() overhead. What am I doing wrong?

P.S. The ring buffer class function declaration - uint16_t write(uint8_t *dstBuffer, uint16_t length);

Code: Select all#include <ESP8266WiFi.h>
#include <WiFiClient.h>
#include <ESP8266HTTPClient.h>

#include <RingBuffer.h>

#define RING_BUFFER_SIZE 256
#define URL_ADDRESS      "http://address"


RingBuffer ringBuffer(RING_BUFFER_SIZE);
WiFiClient client;
HTTPClient http;

int16_t readBytes;


void setup(){
  if (http.begin(client, URL_ADDRESS) == true)
  {
    int16_t httpCode = http.GET();

    if (httpCode == HTTP_CODE_OK)
    {
      Serial.println(F("ESP CLIENT..............connected to server"));
    }
    else
    {
      Serial.printf_P(PSTR("ESP CLIENT..............connection to server failed, %s\n"), http.errorToString(httpCode).c_str());
    }
  }
}

void loop() {
  WiFiClient *stream = http.getStreamPtr();

  readBytes = stream->available();

  readBytes = readBytes < ringBuffer.freeSpace() ? readBytes : ringBuffer.freeSpace();

  ringBuffer.write(reinterpret_cast<uint8_t*>(stream), readBytes); //read directly from HTTP client stream to ring buffer
}