When network interface is down, some nasty things happen, for instance tcp_connect returns without ever calling error callback.
This change adds some workarounds for that: before doing a tcp connect and DNS resolve we check if there is a route available.
Also added a listener for wifi events which stops (aborts) all the WiFiClients and WiFiUDPs when wifi is disconnected. This should
help libraries detect disconnect properly.
- begin changes
allow setting BSSID/MAC and Channel of an AP for faster connection (#261)
now checks if ssid and passphrase to big
selecting Wifi mode in better way (fix for #28)
- ESP8266WiFiMulti uses the new functions to auto select best AP even in a multi AP WiFi network (more the one AP has same SSID)
- add new functions to get current Connected AP:
uint8_t * BSSID(void);
int32_t Channel(void);
- add new functions to get infos from scanned networks:
uint8_t * BSSID(uint8_t networkItem);
int32_t Channel(uint8_t networkItem);
bool isHidden(uint8_t networkItem);
bool getNetworkInfo(uint8_t networkItem, const char** ssid, uint8_t * encryptionType, int32_t * RSSI, uint8_t ** BSSID, int32_t * channel, bool * isHidden);
- auto select ssid with best signal
- for debugging enable DEBUG_WIFI_MULTI macro and call Serial.setDebugOutput(true);
change ESP8266WiFiClass::status() return type to wl_status_t
