DATASHEET¶
Main Controller¶
| Item | Specification |
|---|---|
| MCU | Renesas RA4M1 |
| Clock Speed | 48 MHz |
| RAM | 32 KB |
| Flash Storage | 256 KB |
Acceleration Measurement¶
| Item | Specification |
|---|---|
| Accelerometer | MPU6050 |
| Measurement Range | ±2g / ±4g / ±8g / ±16g |
| Resolution | 16-bit |
| Noise Level | 0.0004 g/√Hz |
Tip
The highest sampling rate tested during development is 250Hz, higher rates are not tested. The longest sampling duration tested is 5 minutes; longer durations are untested, with the theoretical duration being the SD card capacity divided by the sampling rate.
Wireless Communication¶
- WiFi
- nRF24L01
Tip
In practical tests, the WiFi module's effective range when connected to a mobile hotspot is approximately 20 meters (tested in an elevated pedestrian bridge environment over a highway).
Tip
The wireless communication module has been tested at a rate of 250Kbps, with a theoretical maximum communication distance of up to 1100 meters. The longest communication distance tested during development is approximately 25m; longer distances are untested.
Storage¶
- Supports up to 32 GB SD card, higher capacity SD cards are untested.
Power Supply¶
- Operating Voltage: 5V
- Power Module: 3.7V Li-ion battery (2 × 18650)