ESP32 Forum

Posted: **Thu Nov 22, 2018 2:04 pm**

hi , I am using the ESP 32 to send parameters VIA POST to website , I am using this code :

Code: [Select all] [Expand/Collapse]

        timeA=millis();
        USE_SERIAL.println(timeA - timeB);
        strTotURL=strBaseUrl+strPage;
        strTotURL.replace(" ", "");
        //USE_SERIAL.println(strTotURL);
        http.begin(strTotURL, ca); //HTTPS
        http.addHeader("Content-Type", "application/x-www-form-urlencoded", false, true);
        httpCode = http.POST(strParams);      
        if(httpCode > 0)         // httpCode will be negative on error
        {            
            if(httpCode == HTTP_CODE_OK) // file found at server
            {
                String payload = ">ADJ "+http.getString();
                USE_SERIAL.println(payload);//+payload
                timeA=millis();
                /*USE_SERIAL.print("time befor : " + timeB/1000);
                USE_SERIAL.print(" time after : " + timeA/1000);
                USE_SERIAL.println(" elapsed : " + ((timeA-timeB)/1000));*/
                USE_SERIAL.println(timeA - timeB);
            }
            else
            {
                String payload = http.getString();
                USE_SERIAL.println(String(">fail")+payload);              
            }
        } 
        else 
        {
           USE_SERIAL.print(String(">")+httpCode);
           USE_SERIAL.println(">Acc ER1");
        }
 
        http.end();

GeSHi © Codebox Plus Extension

the problem is that the process is taking 2 sec give or take , is there any way that I can make it faster ?

Posted: **Sun Nov 25, 2018 10:01 pm**

Get a faster uplink and/or server

One problem is that HTTP negotiates a connection on each POST/GET etc.
So there is a lot of 'hello are you there', 'o yes I offer this', 'go on then here's my command' going on in each POST/GET.
Each interaction has potentionally a large latency.

MQTT and/or websockets would reduce latency significantly as these connection are established just the once rather on each transaction.
Grouping data will also improve performance. If you have 5 items to send then combine into one post.
I know - stamp coupling but the uplink won't bend to software 'rules'.

Unfortunately production quality software has to deal with potentially long response times.
The remote will not recieve data regularly and you will not always immediately recieve a 'i got it' response.

So you need to create a task which manages the uplink and allows your main task to get on with whatever.

ESP32 Forum

POST to website

POST to website

Re: POST to website