* Speed up upload by a factor of 17
Uploads are very slow because of an unnecessary "client.connected()" check in _uploadReadByte().
Here is what happens:
client.connected() is called for every byte read. WiFiClient::connected() calls recv(fd(), &dummy, 0, MSG_DONTWAIT); which takes a relatively long time, so the optimized path of returning a buffered byte via client.read() is effectively nullified.
Removing the one line changed the upload speed for a 2 MB file (discarding the received data) from 22 KB/sec (before) to 367 KB/sec (after).
The change is safe in the face of disconnects because client.read(), when it no longer has buffered data, calls (WiFiClient) fillBuffer(), which calls recv(), so the disconnection will be detected in due course.
* Move disconnect check into the timeout loop
Compiler complains on unused parameter pCharacteristicMap:
framework-arduinoespressif32\libraries\BLE\src\BLERemoteService.cpp: In member function 'void BLERemoteService::getCharacteristics(std::map<short unsigned int, BLERemoteCharacteristic*>*)':
\framework-arduinoespressif32\libraries\BLE\src\BLERemoteService.cpp:246:89: warning: parameter 'pCharacteristicMap' set but not used [-Wunused-but-set-parameter]
void BLERemoteService::getCharacteristics(std::map<uint16_t, BLERemoteCharacteristic*>* pCharacteristicMap) {
Added guarded define to set the stacksize on the main looptask.
Advantage of this is that build_flags can be used to provide a different value for the stack size should it be neccessary
default behaviour is unaffected
The goal is to allow custom configuration for `variants_dir` to define our own board variant directly in the project.
With this functionnality, we are now allowed to define in our projects a custom board **AND** a custom variant.
https://docs.platformio.org/en/latest/platforms/creating_board.html#custom-embedded-boards
Here is an example of how to define a custom board with custom variant:
```
my_project
├── boards
│ └── custom_esp32dev.json
└── variants
└── custom-esp32dev
└── pins_arduino.h
```
custom_esp32dev.json
```json
{
"build": {
"arduino":{
"ldscript": "esp32_out.ld"
},
"core": "esp32",
"extra_flags": "-DARDUINO_ESP32_DEV",
"f_cpu": "240000000L",
"f_flash": "40000000L",
"flash_mode": "dio",
"mcu": "esp32",
"variants_dir": "variants",
"variant": "custom-esp32dev"
},
"connectivity": [
"wifi",
"bluetooth",
"ethernet",
"can"
],
"debug": {
"openocd_board": "esp-wroom-32.cfg"
},
"frameworks": [
"arduino",
"espidf"
],
"name": "My Custom Espressif ESP32 Dev Module",
"upload": {
"flash_size": "4MB",
"maximum_ram_size": 327680,
"maximum_size": 4194304,
"require_upload_port": true,
"speed": 460800
},
"url": "https://en.wikipedia.org/wiki/ESP32",
"vendor": "Espressif"
}
```
