ESP8266 Community Forum

I want to post like a=1&b=2&c=3

If you do some more searches, you will find that you can easily do some GET or POST using simple example such ESP8266WiFi/examples/WiFiClient/WiFiClient.ino

EDIT : Using ESP8266HTTPClient/src/ESP8266HTTPClient.h, it should be quite the same :
int HTTPClient::POST(String payload)

A question for you Martin, or any other smart person : of the different library choices for making HTTP requests, do you have a preferred library? If so, why: better syntax, faster method, smaller binary, etc?

Thanks. I've just moved over to the Arduino way of using ESP8266. It seems that this is where the most action is.

I'm not sure of understanding the question ...
Personally, I've not yet got any needs to do a POST from ESP on remote server.
But if I need to do so, the API I've mentioned would be my first try to avoid reinventing the wheel.
If I wish to have smaller code, yes, I could do my own POST only using WiFiClient.