Multiple request failed with random error code from -1 to -5

[laibulle]

Hi,

I am creating a small extreme feedback device and I am experimenting some issues with HttpClient.

Actually request failed randomly and when is set http.setReuse(false), just the first request is succesfull.

It's working with bash so I am pretty sur that it is not a server issue.

Am I missing something ?

Thank you.

My code

#include <Arduino.h>
#include <ESP8266WiFi.h>
#include <ESP8266WiFiMulti.h>
#include <ESP8266HTTPClient.h>
#define USE_SERIAL Serial

ESP8266WiFiMulti WiFiMulti;

// Wifi settings
const char SSID[ ] = "myssid";
const char SECRET[ ] = "mysecreet";

// Jenkins parameters
const char SERVER [ ] = "server";
const int PORT = 80;
const bool HTTPS = false;
const String ENDPOINTS[ ] = {"/job/success/api/json?tree=color", "/job/test/api/json?tree=color"};

// System settings
const int LED = 2;
const int CHECK_DELAY = 1000;

bool success = true;

void setup() {
    USE_SERIAL.begin(115200);
    USE_SERIAL.printf("[SETUP] WAIT ...\n");
    USE_SERIAL.flush();
    pinMode(LED, OUTPUT);     // Initialize the BUILTIN_LED pin as an output

    WiFiMulti.addAP(SSID, SECRET);
}

String getColor(HTTPClient *http, String endpoint){

    http->begin(SERVER, PORT, endpoint); //HTTP

    USE_SERIAL.println("[HTTP] " + endpoint);

    // start connection and send HTTP header
    int httpCode = http->GET();
    if(httpCode) {

        // HTTP header has been send and Server response header has been handled
        USE_SERIAL.printf("[HTTP] GET... code: %d\n", httpCode);

    // file found at server
    if(httpCode == 200) {
      String payload = http->getString();
      payload.replace("{\"color\":\"", "");
      payload.replace("\"}", "");
      USE_SERIAL.println("[HTTP] " + payload);

      return payload;     
    }
  } else {
    USE_SERIAL.print("[HTTP] GET... failed, no connection or no HTTP server\n");
  }

  http->end();
  delay(200);

  return "";
}

/**
 * Build is success when color is BLUE
 */
bool isSuccess(String color){
  return color.startsWith("blue");
}

/**
 * Is building
 */
bool isBuilding(String color){
  return color.endsWith("_anime");
}

/**
 * Alternate the GPIO level
 */
void blink(int delay_ms, int count){
  for(int i=0; i <= count; i++){
    digitalWrite(LED, HIGH);  // Turn the LED off by making the voltage LOW
    delay(delay_ms);
    digitalWrite(LED, LOW);  // Turn the LED off by making the voltage HIGH
    delay(delay_ms);
  }
}

/**
 * Diplay the result of the build
 */
void display(){
  if(success){
      digitalWrite(LED, LOW);  // Turn the LED off by making the voltage LOW
      USE_SERIAL.print("[DISPLAY] Build is success\n");
    }else{
      digitalWrite(LED, HIGH);  // Turn the LED off by making the voltage HIGH
      USE_SERIAL.print("[DISPLAY] Build failed\n");
    }
}

void loop() {

  // wait for WiFi connection
  if((WiFiMulti.run() == WL_CONNECTED)) {
    HTTPClient http;
    http.setReuse(true);

    blink(10, 2);
    display();

    bool currentSuccess = true;  
    bool currentBuilding = false;   
    for(int i = 0; i < sizeof(ENDPOINTS) / sizeof(String); i++) {
      String color = getColor(&http, ENDPOINTS[i]);

      if(!isSuccess(color)){
        currentSuccess = false;
      }

      if(isBuilding(color)){
        currentBuilding = true;
      }
    }


    success = currentSuccess;

    display();
  }

  delay(CHECK_DELAY);   
}

OUTPUT

[SETUP] WAIT ...
[DISPLAY] Build is success
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: -5
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: -1
[DISPLAY] Build failed
[DISPLAY] Build failed
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[DISPLAY] Build is success
[DISPLAY] Build is success
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: -2
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: -1
[DISPLAY] Build failed
[DISPLAY] Build failed
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[DISPLAY] Build is success
[DISPLAY] Build is success
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: -1
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: -1
[DISPLAY] Build failed
[DISPLAY] Build failed
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: -1
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: -1
[DISPLAY] Build failed
[DISPLAY] Build failed
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[DISPLAY] Build is success
[DISPLAY] Build is success
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: -1
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: -1
[DISPLAY] Build failed
[DISPLAY] Build failed
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: -1
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: -1
[DISPLAY] Build failed
[DISPLAY] Build failed
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[DISPLAY] Build is success
[DISPLAY] Build is success
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: -1
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: -1
[DISPLAY] Build failed
[DISPLAY] Build failed
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: -1
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: -1
[DISPLAY] Build failed
[DISPLAY] Build failed
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[DISPLAY] Build is success
[DISPLAY] Build is success
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: -1
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: -1
[DISPLAY] Build failed
[DISPLAY] Build failed
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: -1
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: -1
[DISPLAY] Build failed
[DISPLAY] Build failed
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[DISPLAY] Build is success
[DISPLAY] Build is success
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: -1
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: -1
[DISPLAY] Build failed
[DISPLAY] Build failed
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[DISPLAY] Build is success
[DISPLAY] Build is success
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[DISPLAY] Build is success
[DISPLAY] Build is success
[HTTP] /job/success/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[HTTP] /job/test/api/json?tree=color
[HTTP] GET... code: 200
[HTTP] blue
[DISPLAY] Build is success

[Links2004]

error codes:

#define HTTPC_ERROR_CONNECTION_REFUSED  (-1)
#define HTTPC_ERROR_SEND_HEADER_FAILED  (-2)
#define HTTPC_ERROR_SEND_PAYLOAD_FAILED (-3)
#define HTTPC_ERROR_NOT_CONNECTED       (-4)
#define HTTPC_ERROR_CONNECTION_LOST     (-5)
#define HTTPC_ERROR_NO_STREAM           (-6)
#define HTTPC_ERROR_NO_HTTP_SERVER      (-7)

https://github.com/esp8266/Arduino/blob/master/libraries/ESP8266HTTPClient/src/ESP8266HTTPClient.h#L37-L43

its look like a connection problem to the server. check your WiFi / server for stability.
the usage of the library looking good.

the current git version allow to print the errors as strings.
https://github.com/esp8266/Arduino/blob/master/libraries/ESP8266HTTPClient/examples/BasicHttpClient/BasicHttpClient.ino#L64