ESP 32

The ESP32 family isn’t just one chip—it’s a whole ecosystem of microcontrollers, each with different specs, features, and target uses.
They mainly differ in CPU type, wireless capabilities, number of cores, available RAM/flash, and package size.

Here’s an organized breakdown:

 

1. Original ESP32 Series (ESP32 “Classic” Line)

• ESP32-WROOM-32
  • The most common module — dual-core Xtensa LX6 @ up to 240 MHz.
  • Integrated Wi-Fi + Bluetooth (Classic + BLE).
  • Variants: WROOM-32, WROOM-32D, WROOM-32U (D = on-board PCB antenna, U = external antenna).
• ESP32-WROVER
  • Like WROOM, but with extra 4–8 MB PSRAM for more RAM-heavy apps (e.g., cameras, buffering).

2. ESP32-S Series (Single-Core Variants)

• ESP32-S0WD / ESP32-S2 / ESP32-S3
  • ESP32-S0WD — stripped down, single-core, lower cost, same Wi-Fi + BT as WROOM.
  • ESP32-S2 — Wi-Fi only (no Bluetooth), USB OTG built-in, single-core LX7, better security.
  • ESP32-S3 — Dual-core LX7, Wi-Fi + BLE 5.0, vector instructions for AI acceleration, USB OTG.

3. ESP32-C Series (RISC-V Based)

• ESP32-C3
  • Single-core 32-bit RISC-V, Wi-Fi + BLE 5.0.
  • Low-power, good for IoT sensors.
• ESP32-C6
  • RISC-V, Wi-Fi 6 + BLE 5.3 + Thread/Zigbee.
  • Future-proof for smart home protocols (Matter).

4. ESP32-H Series (For Bluetooth + Low Power)

• ESP32-H2
  • RISC-V, BLE 5.2 + Thread/Zigbee, no Wi-Fi.
  • Ideal for ultra-low-power mesh devices.

5. Special Function Modules

• ESP32-PICO Series
  • System-in-package with built-in flash and crystal—super small footprint.
• ESP32-Lyra / ESP32-Audio Kits
  • Audio-focused dev boards with codecs and amps.
• ESP32-CAM
  • ESP32 module with OV2640/OV3660 camera support, SD card slot.