Nordic Semiconductor
nRF52840 Edge AI Guides
256 KB SRAM with FPU and DSP supports gesture recognition and keyword spotting. Limited clock speed (64 MHz) constrains larger models.
Hardware Specs
| Processor | ARM Cortex-M4F @ 64 MHz |
| Cores | 1 |
| Clock | 64 MHz |
| SRAM | 256 KB |
| Flash | 1 MB |
| FPU | single |
| Connectivity | Bluetooth 5.0 LE, 802.15.4 (Thread/Zigbee), NFC, USB 2.0 |
| Key Features | Built-in 9-axis IMU (LSM9DS1) on Arduino Nano 33 BLE, Arduino ecosystem, Ultra-low-power BLE, Built-in microphone (Sense variant) |
| Price | $5–$8 (chip), $20–$35 (dev board) |
22 dev boards available across PlatformIO registries.
Hardware Guides
Arduino Nano 33 BLE Anomaly Detection Edge Impulse
The Arduino Nano 33 BLE Sense runs Edge Impulse anomaly detection using its built-in sensors — accelerometer, temperature, and microphone. E…
Arduino Nano 33 BLE Gesture Recognition TFLite
The Arduino Nano 33 BLE is a beginner-friendly option for gesture recognition with TFLite Micro. Its built-in 9-axis IMU (LSM9DS1) eliminate…
Arduino Nano 33 BLE Voice Recognition Edge Impulse
The Arduino Nano 33 BLE Sense runs keyword spotting with Edge Impulse using its built-in MP34DT05 microphone. The 256 KB SRAM handles small …
nRF52840 Anomaly Detection with Edge Impulse
For anomaly detection, the nRF52840 with Edge Impulse scores Excellent. Its 256 KB internal SRAM (8.0x the required 32 KB) and 64 MHz clock …
nRF52840 Anomaly Detection with TFLite Micro
Nordic Semiconductor's nRF52840 excels at anomaly detection via TFLite Micro. The 1-core cortex-m4f at 64 MHz with 256 KB SRAM handles 15 KB…
nRF52840 Fall Detection with Edge Impulse
The nRF52840 is an excellent match for fall detection with Edge Impulse. 256 KB SRAM delivers 4.0x the 64 KB minimum while 64 MHz processes …
nRF52840 Fall Detection with TFLite Micro
The nRF52840 is an excellent match for fall detection with TFLite Micro. 256 KB SRAM delivers 4.0x the 64 KB minimum while 64 MHz processes …
nRF52840 Gesture Recognition with Edge Impulse
Nordic Semiconductor's nRF52840 excels at gesture recognition via Edge Impulse. The 1-core cortex-m4f at 64 MHz with 256 KB SRAM handles 20 …
nRF52840 Gesture Recognition with TFLite Micro
Running gesture recognition on the nRF52840 with TFLite Micro is practical. 256 KB SRAM meets the 64 KB minimum with 4.0x headroom. The 64 M…
nRF52840 Image Classification with Edge Impulse
The nRF52840 handles image classification effectively with Edge Impulse. 256 KB SRAM at 64 MHz provides 2.0x headroom over the 128 KB requir…
nRF52840 Image Classification with TFLite Micro
Running image classification on the nRF52840 with TFLite Micro is practical. 256 KB SRAM meets the 128 KB minimum with 2.0x headroom. The 64…
nRF52840 Predictive Maintenance with Edge Impulse
For predictive maintenance, the nRF52840 with Edge Impulse scores Excellent. Its 256 KB internal SRAM (4.0x the required 64 KB) and 64 MHz c…
nRF52840 Predictive Maintenance with TFLite Micro
For predictive maintenance, the nRF52840 with TFLite Micro scores Excellent. Its 256 KB internal SRAM (4.0x the required 64 KB) and 64 MHz c…
nRF52840 Sound Classification with Edge Impulse
The nRF52840 is an excellent match for sound classification with Edge Impulse. 256 KB SRAM delivers 4.0x the 64 KB minimum while 64 MHz proc…
nRF52840 Sound Classification with TFLite Micro
The nRF52840 is an excellent match for sound classification with TFLite Micro. 256 KB SRAM delivers 4.0x the 64 KB minimum while 64 MHz proc…
nRF52840 Voice Recognition with Edge Impulse
The nRF52840 handles voice recognition effectively with Edge Impulse. 256 KB SRAM at 64 MHz provides 2.0x headroom over the 128 KB requireme…
nRF52840 Voice Recognition with TFLite Micro
Running voice recognition on the nRF52840 with TFLite Micro is practical. 256 KB SRAM meets the 128 KB minimum with 2.0x headroom. The 64 MH…
nRF52840 Wildlife Monitoring with Edge Impulse
The nRF52840 handles wildlife monitoring effectively with Edge Impulse. 256 KB SRAM at 64 MHz provides 2.0x headroom over the 128 KB require…
nRF52840 Wildlife Monitoring with TFLite Micro
Nordic Semiconductor's nRF52840 is a solid choice for wildlife monitoring using TFLite Micro. The cortex-m4f core at 64 MHz with 256 KB SRAM…
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520 KB RAM · 240 MHz
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ESP32-S2
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320 KB RAM · 240 MHz
ESP32-S3
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512 KB RAM · 240 MHz
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i.MX RT1052
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1024 KB RAM · 600 MHz
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LPC55xx
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320 KB RAM · 150 MHz
nRF52832
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64 KB RAM · 64 MHz
nRF52833
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128 KB RAM · 64 MHz
RA6M5
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512 KB RAM · 200 MHz
SAMD51
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256 KB RAM · 120 MHz
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STM32F3
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STM32F4
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STM32F7
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STM32G4
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STM32H5
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STM32H7
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1024 KB RAM · 480 MHz
STM32L4
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128 KB RAM · 80 MHz
STM32L5
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256 KB RAM · 110 MHz
STM32U5
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STM32WB
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256 KB RAM · 64 MHz
Orchestrate nRF52840 Edge AI with ForestHub
The nRF52840 runs inference on-device. ForestHub on your Linux edge gateway ingests its results over MQTT, orchestrates the sense-reason-act loop as a deterministic, auditable graph, and acts on the line.
Get Started Free