ESP8266 Community Forum

Hello dear ESP8266 friends,

this week I made my first tries with an ESP12e Module and the Arduino IDE. I believe it`s a great thing.

I provided my Arduino IDE with "http://arduino.esp8266.com/stable/package_esp8266com_index.json" and started with this example:
http://www.instructables.com/id/Programming-a-HTTP-Server-on-ESP-8266-12E/step7/Listen-to-What-the-Browser-is-Sending-to-the-HTTP-/

It`s working fine ... but I have questions. The author is using functions like "client.readString()" . Therefore he only includes a header file named ESP8266WiFi.h. I can`t find this file on my computer. So I googled for it and found this collection:
https://github.com/sandeepmistry/esp8266-Arduino/tree/master/esp8266com/esp8266/libraries/ESP8266WiFi/src

But there is no readString() defined in any file ? From where does the author knows about the existence of the readString function ?

It seems, that only the readString function works properly. Trying the defined functions "int read()" or "read(uint8_t *buf, size_t size)" failed.

Can somebody point me to the valid header file(s) which I can use with my Arduino IDE, please ?

Friendly regards
Henning

Assuming Windows, open a command line window and try



This should show the directory with this file assuming it esists.

WiFiClient is derived from Client, which is derived from Stream, which has the readString() method.
.arduino15/packages/esp8266/hardware/esp8266/2.1.0/cores/esp8266/Stream.h

Thank you very much. I was wondering why the readString works and the read does not but I realized that the read function is none-blocking and that I have to wait for data using the available method.

(and I supressed c++ inheritance while exploring the new hardware, sorry)