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> Partition & OTA Manager > GPIO Matrix & LEDC PWM > WiFi Throughput Calculator

partition ota manager

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Flash Partition Configurator (ESP-IDF)

Flash Memory Capacity

App partition size (MB)

OTA Architecture (2 slots)Data partition (SPIFFS/LittleFS)

Flash Usage (OTA Checker)3.94 MB / 4 MB

partitions.csv (Ready for ESP-IDF)

# Name,   Type, SubType, Offset,  Size, Flags
nvs     , data , nvs     , 0x9000  , 0x5000, 
phy_init, data , phy     , 0xe1eb.851eb851f, 0x1000, 
otadata , data , ota     , 0xf24d.d2f1a9fbf, 0x2000, 
ota_0   , app  , ota_0   , 0x11312.6e978d4fe, 0x180000, 
ota_1   , app  , ota_1   , 0x191312.6e978d5, 0x180000, 
spiffs  , data , spiffs  , 0x311312.6e978d5, 0xe7ced.916872b,

📖 ESP32 OTA & Flash

OTA (Over-The-Air): To safely update ESP32 over WiFi, you need TWO equal code partitions (`ota_0` and `ota_1`). While one is running, the update is downloaded to the other. This forces dividing the Flash capacity in half!
Factory vs OTA: If you have OTA, you do not need the `factory` partition. The bootloader will figure out which app to load based on a flag in `otadata`.