ESP32 vs ESP32-S3 vs ESP32-C3: Which Chip Should You Choose?
The ESP32-S3 wins overall for its combination of dual-core power, 8MB PSRAM, and USB-OTG, but the ESP32-C3 is the better choice for budget sensors and the original ESP32 still has the largest community. Your choice depends on whether you need maximum capability, minimum cost, or maximum community support.
Head-to-Head Comparison
| Category | Winner | Why |
|---|---|---|
| Processing Power | ESP32-S3-DevKitC-1 | The ESP32-S3 uses a dual-core Xtensa LX7 at 240MHz with AI vector instructions, outperforming both the original ESP32's dual-core LX6 at 240MHz (older architecture, no vectors) and the ESP32-C3's single-core RISC-V at 160MHz. For multitasking and compute-heavy workloads, the S3 leads decisively. |
| Memory | ESP32-S3-DevKitC-1 | The ESP32-S3-DevKitC offers 8MB flash and 8MB PSRAM, compared to the original ESP32's 4MB flash with no PSRAM and the C3's 4MB flash with no PSRAM. The PSRAM gap is the single biggest differentiator — it enables camera frame buffers and ML model storage that are impossible on the other two. |
| Wireless Connectivity | ESP32-S3-DevKitC-1 | All three have WiFi 802.11 b/g/n. The S3 and C3 both offer BLE 5.0, while the original ESP32 is limited to BLE 4.2. BLE 5.0 provides 2x throughput and 4x range with Coded PHY. The S3 wins narrowly because it pairs BLE 5.0 with dual-core processing that handles WiFi and BLE concurrently without contention. |
| I/O and Interfaces | ESP32-DevKitC V4 | The original ESP32-DevKitC has 34 GPIO pins and 18 ADC channels — the most in this comparison. The ESP32-S3 has 45 GPIO but its DevKitC form factor exposes most of them. The C3 has only 22 GPIO and 6 ADC channels. For multi-sensor projects with many peripherals, the original ESP32 remains the most flexible. |
| Power Efficiency | ESP32-C3-DevKitM-1 | The ESP32-C3 draws 5uA in deep sleep — the lowest of the three. The S3 manages 7uA and the original ESP32 draws 10uA. For battery-powered sensors that spend most of their time asleep, the C3's single-core RISC-V architecture delivers measurably longer battery life. |
| Community and Ecosystem | ESP32-DevKitC V4 | The original ESP32 has been available since 2016, giving it a decade of tutorials, libraries, forum posts, and Stack Overflow answers. The S3 and C3 have growing communities but cannot match the original's depth of documentation. For beginners who will rely on existing examples, the original ESP32 has the smoothest learning curve. |
Which Board for Your Project?
| Use Case | Recommended | Why |
|---|---|---|
| Camera or video project | ESP32-S3-DevKitC-1 | Only the S3 has a DVP camera interface and enough PSRAM (8MB) to buffer frames. The others cannot physically connect or process camera data. |
| Battery-powered temperature sensor | ESP32-C3-DevKitM-1 | 5uA deep sleep current is 50% lower than the ESP32 and 28% lower than the S3. Single-core RISC-V handles the simple read-transmit-sleep cycle without waste. |
| USB macro keyboard | ESP32-S3-DevKitC-1 | USB-OTG 1.1 enables native HID without a UART bridge. The original ESP32 has Micro-USB with a UART bridge that cannot act as HID. The C3 has USB CDC but not full OTG. |
| Multi-sensor weather station | ESP32-DevKitC V4 | 34 GPIO pins and 18 ADC channels connect more sensors simultaneously than the S3 (45 GPIO but breadboard-limited) or C3 (22 GPIO, 6 ADC). |
| Learning embedded development | ESP32-DevKitC V4 | The largest collection of tutorials, libraries, and community answers. Every ESP32 learning resource starts with the original chip. |
| Rust firmware development | ESP32-C3-DevKitM-1 | RISC-V has first-class Rust support via the standard RISC-V target in the Rust compiler. The Xtensa ESP32 and S3 require a custom fork of LLVM for Rust compilation. |
Where to Buy
Final Verdict
Buy the ESP32-S3 if you need processing power, PSRAM, camera support, or USB-OTG — it is the most capable chip in the ESP32 family. Buy the ESP32-C3 if you need the lowest power draw, the lowest cost, or native Rust/RISC-V support for simple sensor projects. Buy the original ESP32 if community support and library availability are your top priorities, or if you need maximum GPIO pins for multi-sensor setups.
Frequently Asked Questions
Which ESP32 chip is best for beginners?
The original ESP32 (DevKitC) has the most tutorials, examples, and community support. Every ESP32 learning resource, YouTube video, and Arduino library was built for the original chip first. The C3 is a good second choice for beginners interested in RISC-V.
Can I run the same code on all three chips?
Arduino and ESP-IDF code is mostly portable across all three. However, the ESP32 uses Xtensa LX6, the S3 uses Xtensa LX7, and the C3 uses RISC-V — so any inline assembly or architecture-specific code will need changes. High-level Arduino sketches typically work unmodified.
Do all three chips support WiFi and Bluetooth?
All three support WiFi 802.11 b/g/n. The S3 and C3 have BLE 5.0, while the original ESP32 has BLE 4.2 and also supports Bluetooth Classic (A2DP audio profile). None have WiFi 6 — that requires the ESP32-C6.
Which chip uses the least power?
The ESP32-C3 at 5uA deep sleep current. The S3 draws 7uA and the original ESP32 draws 10uA. For active WiFi transmission, all three draw similar current (120-240mA depending on TX power).
Which ESP32 chip supports Matter?
All three can run Matter over WiFi. However, for Matter over Thread (mesh networking), you need the ESP32-C6 or ESP32-H2 which have 802.15.4 radios. The S3, C3, and original ESP32 are WiFi-only for Matter.