The TTGO/LILYGO boards are one of the popular ESP32 products. Here we want to make a TTGO/LILYGO project with the OTA feature.

Most of IoT products works with a simcard and GSM module. So if you want to use OTA function fo furtur upgrades on your devices, you have to use an OTA server witch support smal packet requests due the gsm limitations make the device to download a large file in several smal parts.