#222 More Memory for the ESP32 without Soldering (How-to adapt partition sizes)

Sometimes we need more memory for our sketches. In this quickie, I show you how you get it without heating up your soldering iron.

Most of the ESP32 modules have 4Mbyte flash memory chips. But if you look at the usable memory size, you only get 1310720 bytes, which is roughly one-quarter of your flash memory. With a blink sketch, this is no problem. It only uses 13% of the available space. But if you use the simple BLE_server example, which is just a few lines long, it occupies already 85% of your flash memory. If you add some other libraries, you quickly get an “out of memory” error. Partitioning and ESP32 partition tables provide the solution.

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