My fix

[NgDKhanh]

I added OTA function to AirSENSE-IDF system. OTA task reads JSON from server and checks version. If it's a new version, it creates a http client with key is md5_checksome read from JSON.
URL will looks like : http://................/api/get/dataFile?api_key=md5_checksome

Also I add esp_wifi_set_ps(WIFI_PS_NONE); to ensure to disable any WiFi power save mode, this allows best throughput and hence timings for overall OTA operation.

But this version has some small problems:

• I want to create checkOTA Task when esp32 connect to Wifi for the first time since reboot. And then suspend that task whenever esp32 disconnect to Wifi. But the problem is when OTA downloaded image and write to flash, esp_restart() function doesn't work correctly! It just disconnect esp32 from wifi and stuck there, other tasks (get data from sensor, push data to queue and save data from queue to SD card) still operate !
• I have a solution that: create a restart task waiting for a semaphore. This semaphore is gived when OTA download and write image to flash done. This task have only 1 function that is esp_restart() and create in main().