| Technical Specifications | |
|---|---|
| Weight | 260 grams |
| Dimensions | Enclosure: 120 x 69 x 28 mm^3; Antenna length: 180 mm |
| Radio physical layer | 500 mW and 150 mW transmission power. In mesh network mode: Frequency Hopping Spread Spectrum (FHSS), GFSK modulation, narrowband channels with high sensitivity receiver, 17 channels (FHSS) @ 869 MHz ISM band, radio collision avoidance (Listen Before Talk). |
| Radio protocol layer | Full mesh network (trigger impulses are repeated by all wiNodes). Supports up to 6 jumps in any possible jump path (example: Start ⇒ IM1 ⇒ IM2 ⇒ IM3 ⇒ IM4 ⇒ Finish ⇒ wiTimer).
Impulse transmission redundancy. Radio packet validness check (CRC-16). Handles simultaneous impulses. |
| Radio transmission range | wiNode to wiNode: 14 km *. Typically, for long courses like downhill etc, wiNode modules would be positioned at the top of pitches throughout the slope. This ensures strong and reliable radio signals throughout the course.
(* 14 km is a conservative result based on the '2-Ray ground reflection model' where modules are placed 2 m above ground level. A more than adequate fade margin of 10dB is used in the model. Much greater range is achievable if each module is placed very high above ground level [like mountain top to mountain top]). In practice, pitches will degrade the radio signal strength received and the range is reduced substantially. This is where the mesh-technolgy comes into play. |
| Impulse accuracy | wiNode to wiNode/wiTimer: ± 0.2 ms |
| Time base | 26 MHz TCXO (Temperature Compensated Crystal Oscillator), ± 1 ppm stability vs. temperature, ± 2 ppm initial tolerance, ± 1 ppm/year aging |
| Operating temperature | -20 C° to +50 C° |
| Power supply | Internal 2500 mAh Li-po battery with intelligent internal charging circuit. Battery temperature monitor, short circuit protection and overvoltage protection. Rechargable. Also rechargable by USB Power bank. |
| Battery life | 12 to 20 hours of continuous use (includes photocell and wiNode power supply). Battery level indication sent wirelessly to wiTimer. Also shown on wiNode. |
| Firmware | New firmware updates sent wirelessly from wiTimer. wiTimer downloads all firmware directly from our server via Wi-Fi. |
| Microcontroller | 32 Bit, 64 kByte MCU FLASH memory |
| User interface | Waterproof 4-button keypad. High contrast 128x64 pixels OLED or graphical LCD display with LED backlight (customer may choose). Easy menu for module definition (start, intermediate[1-4], finish or ext. impulse using charger connector), transmitter power level and other selections. All configurations are stored in memory. |
| Memory | Additional FLASH memory external to MCU. |
| Cable connections | Cable through waterproof cable gland to photocell and to start gate. |
| Water protection | Photocell: IP67. wiNode: IP65 |
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