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[distro inferno]

I'm having trouble understanding how code like this can work:

(from https://github.com/esp8266/Arduino/blob ... Events.ino ):

Code: Select all

/*
 *  This sketch shows the WiFi event usage
 *
 */

#include <ESP8266WiFi.h>

const char* ssid     = "your-ssid";
const char* password = "your-password";


void WiFiEvent(WiFiEvent_t event) {
    Serial.printf("[WiFi-event] event: %d\n", event);

    switch(event) {
        case WIFI_EVENT_STAMODE_GOT_IP:
            Serial.println("WiFi connected");
            Serial.println("IP address: ");
            Serial.println(WiFi.localIP());
            break;
        case WIFI_EVENT_STAMODE_DISCONNECTED:
            Serial.println("WiFi lost connection");
            break;
    }
}

void setup() {
    Serial.begin(115200);

    // delete old config
    WiFi.disconnect(true);

    delay(1000);

    WiFi.onEvent(WiFiEvent);

    WiFi.begin(ssid, password);

    Serial.println();
    Serial.println();
    Serial.println("Wait for WiFi... ");
}


void loop() {
    delay(1000);
}

The WiFiEvent function never gets passed a WiFiEvent_t event when it is called by WiFi.onEvent(WiFiEvent); so how does it work?

And with all the ESP8266 code I look at, the ESP8266WiFi.h include file is so sparse I can't follow where all these functions are defined. The ESP8266 datasheet (version 4.3) also doesn't mention so much of the functionality that I see being used in the arduino code examples. I was expecting a list of C or C++ functions that use capability built in to the chip but I haven't found such a list. Does anyone else know where I can go to get a full enumeration of all the capability of this chip, beyond just trawling through the arduino sample code?

I also do not understand how these sketches can call the header files when the header files aren't in the same folder, and also don't have a filepath. I assume the Arduino IDE is guiding all header calls to the heirarchy of libraries in C:\Users\MyUser\AppData\Local\Arduino15\... (on windows) since that's where the .h files are. :think:

[Mr.Green]

I found more information on this function in the following file:
ESP8266WiFiGeneric.cpp

located in:
...\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.3.0\libraries\ESP8266WiFi\src

hope it helps ☺

[Mr.Green]

Found more info in the ESP8266WiFiType.h file in the same location as previous file.