| ESP32-S3 | ESP32-C3 | |
|---|---|---|
| CPU | Dual-core Xtensa LX7, up to 240 MHz, vector instructions | Single-core 32-bit RISC-V, up to 160 MHz |
| SRAM | 512 KB (+ optional PSRAM on many modules) | 400 KB |
| Wireless | Wi-Fi 4 (2.4 GHz) + Bluetooth LE 5 | Wi-Fi 4 (2.4 GHz) + Bluetooth LE 5 |
| USB | USB OTG + USB Serial/JTAG | USB Serial/JTAG (no OTG) |
| GPIO (chip) | Up to 45 | Up to 22 |
| Camera / LCD interfaces | Yes | No |
| Typical dev board price | ₹600–900 | ₹250–400 |
Both chips are newer members of the ESP32 family with Bluetooth LE 5. They aim at very different jobs. Specifications here come from Espressif’s ESP32-S3 and ESP32-C3 datasheets; prices are indicative.
ESP32-S3: the powerful one
Choose the S3 when you need muscle or USB:
- Cameras and displays — it has camera and parallel-LCD interfaces, and boards with 8 MB PSRAM handle frame buffers easily.
- Machine learning and audio — the LX7 vector instructions speed up neural-network and DSP code.
- USB devices — native USB OTG means it can act as a keyboard, mouse or MIDI device without an extra chip.
- Lots of pins — up to 45 GPIO for big projects.
ESP32-C3: the cheap, efficient one
Choose the C3 for small, connected sensors:
- Among the cheapest Wi-Fi + Bluetooth boards in India (tiny “SuperMini” boards are common).
- A single RISC-V core is plenty for reading sensors, MQTT and a web page.
- Built-in USB Serial/JTAG means many C3 boards need no USB-to-serial chip or driver.
Watch the pin count: tiny C3 boards break out only about a dozen GPIO, and some are strapping pins.
Quick guide
| You’re building… | Pick |
|---|---|
| A temperature/humidity node, smart plug or Wi-Fi alert | C3 |
| A camera, touchscreen dashboard or voice project | S3 |
| A USB gadget (macro pad, game controller) | S3 |
| Your first ESP32 project | Either — or the classic ESP32 DevKit V1, which most kits and tutorials use |
Both are 3.3 V only. Our compile checks cover the C3 today (see the blink sketch on the ESP32 board page); S3 guides are coming.