Hardware Comparison

ESP32-C3 vs nRF52840 for Object Detection

Winner: ESP32-C3 (score 50 vs 20)

Detailed Comparison

The ESP32-C3 edges ahead for object detection with a compatibility score of 50 vs 20 for the nRF52840. However, each platform has distinct advantages depending on deployment requirements. Memory: The ESP32-C3 provides 400 KB SRAM, while the nRF52840 offers 256 KB. For object detection's 256 KB minimum requirement, the ESP32-C3 provides more headroom. Performance: The ESP32-C3 runs at 160 MHz (risc-v) vs the nRF52840 at 64 MHz (cortex-m4f, DSP). The ESP32-C3's significantly higher clock speed translates to faster inference. Connectivity: ESP32-C3 offers Wi-Fi 802.11 b/g/n, Bluetooth 5.0 LE. nRF52840 provides Bluetooth 5.0 LE, 802.15.4 (Thread/Zigbee), NFC, USB 2.0. Wi-Fi on the ESP32-C3 enables direct cloud reporting without additional modules. Cost: ESP32-C3 chips run $1-3 (dev boards $4-10), while nRF52840 chips cost $5-8 (dev boards $20-35). The ESP32-C3 is more cost-effective for volume deployments. Choose the ESP32-C3 when: built-in Wi-Fi is required, you need more RAM for larger models, cost optimization is critical, Arduino/ESP-IDF ecosystem matters, or your team already uses this platform. Choose the nRF52840 when: Zephyr RTOS and BLE are priorities, or you need built-in 9-axis imu (lsm9ds1) on arduino nano 33 ble.

FAQ

Is ESP32-C3 or nRF52840 better for object detection?

ESP32-C3 scores higher (50 vs 20) for object detection. The ESP32-C3's 400 KB SRAM and 160 MHz clock provide a significant edge. However, ecosystem fit and connectivity needs should also influence your decision.

What's the price difference between ESP32-C3 and nRF52840?

ESP32-C3 chips cost $1-3, dev boards $4-10. nRF52840 runs $5-8 per chip, $20-35 for dev boards. At volume, the ESP32-C3 offers better cost efficiency.

Can both ESP32-C3 and nRF52840 use TensorFlow Lite?

Yes, the ESP32-C3 (risc-v) supports TFLite Micro. The nRF52840 (cortex-m4f) also supports TFLite Micro.