Good day!

I bought df robot sim808 shield for my project. I managed to establish TCP connect and send GET request. May I ask anyone to provide examples how to do POST request?
I tried different options like this:

void gsm_http_post( String postdata) {

Serial.println(" --- Start GPRS & HTTP --- ");

gsm_send_serial("AT+SAPBR=1,1");

gsm_send_serial("AT+SAPBR=2,1");

gsm_send_serial("AT+HTTPINIT");

gsm_send_serial("AT+HTTPPARA=CID,1");

gsm_send_serial("AT+HTTPPARA=URL," + url);

gsm_send_serial("AT+HTTPPARA=CONTENT,application/x-www-form-urlencoded");

gsm_send_serial("AT+HTTPDATA=192,5000");

gsm_send_serial(postdata);

gsm_send_serial("AT+HTTPACTION=1");

gsm_send_serial("AT+HTTPREAD");

gsm_send_serial("AT+HTTPTERM");

gsm_send_serial("AT+SAPBR=0,1");

}

but when I use directly AT commands and NOT df robot library it just doesnt work.
Thanks in advance,