The send call may return EAGAIN. This indicates a recoverable error and a retry should be attempted. The current implementation treats this as a fatal error. Further, the current implementation strips the error code, setting it to 0, which prevents the caller from handling it directly.
This change utilizes select to verify the socket is available prior to calling send and will retry on an EAGAIN condition.
WiFi and BlueTooth can now be started and stopped at will.
basic functions added to esp32-hal to start and stop the BT radio
SimpleBLE class added to show the most basic functionality
Example to show how to switch between BT, WiFi or Both
Implement semaphore and mutex to safeguard the ISR.
This is the proper way to handle hardware Interrupts with FreeRTOS. The
more regular approach may/will lead to exceptions
* Added LEDC Fade exmaple
* Renamed LEDCFade example to LEDCSoftwareFade
Added valueMax parameter for ledcAnalogWrite
* Remove usage of LED_BUILTIN constant to solve CI errors
* Refactoring EPS32NVS library to Preferences library
* Renaming all set* functions to put
* Added functions for float, double and bool
* Small redesign of Preferences API
* added type to put* function names
* for (u)int64_t used functions name with *(U)Long64
* added functions for long and unsigned long (same like int a unsigned int)
* Improved ESP32NVS default value support for read* functions
Fixed uninitialized NVS flash storage. Added example code.
* Add methods for String and remove unnecessary nvs_flash_init() in ESP32NVS class
+ other minor declaration fixes
* ESP32NVS function name renaming
* read* -> get*
* write* -> set*
* erase -> clear / remove
Currently there is bug in WiFiUDP library when you want to use beginPacket(...) without listening on socket (without calling begin(...) first). You can't send any data because socket is not open and also tx_buffer is not allocated which cause crash while writing data to tx_buffer.
currently ```esp_wifi_init``` have to be called in ```app_main``` or
WiFi will fail to boot. When possible to boot later, code will be moved
into ```_esp_wifi_start``` to be executed when necessary
IDF Options:
- Autostart Arduino (implements app_main)
- Disable HAL locks
- Set HAL debug level
- Auto-connect STA if configured (else will connect after WiFi.begin())
