| 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. |
Data from PAM Finds