---
tags:
  - micro-controllers
---

# ESP32 microcontroller

- Manufactured by Expressif Systems

- An example of a [system on a chip](./System_on_a_chip.md)

- 520 KB RAM

- Flash memory (non-volatile, equivalent to harddrive) of 4-16MB

- WiFi and [bluetooth](./Bluetooth.md) connectivity.

- Programmable using ESP-IDF SDK (C or C++) or MicroPython (but less efficient
  and you are adding the weight of an interpreter to the flash memory)

For using the ESP32 in different project, you typically use _devboards_, these
are PCBs with ESP32 and different modules attached. The Heltec V3 (for
[lora](/zk/LoRa_radio.md) radio communication) is an example of a devboard.
Different devboards exist for different purposes like sensors etc.