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Proposed Designs
| Design |
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| Pros | Cons | |
|---|---|---|
| Raspberry Pi + LTE Dongle + CAN Dongle |
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| GPy (built-in LTE & WiFi) + CAN Carrier Board |
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| CAN-Ethernet + WiFi Router |
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Wireless Protocols
We should consider to a combination of options to ensure a stable connection during ASC and FSGP
| Protocol | Range/Coverage | Data Rate |
|---|---|---|
| Wi-Fi | 100 m (typical) 3-5 km (long-range & omnidirectional) Direct line-of-sight to the router | > 36.1 Mbps |
| LoRa | 10 km Better non-line-of-sight performance due to a lower frequency of 915 MHz than 2.4 GHz | < 27 kbps |
| LTE/LTE-M | Verizon has LTE coverage over the FSGP track and most of the roads along the ASC route Direct line-of-sight to the tower | < 300 kbps |
| CAN | = 500 kps |
CAN-Wireless Bridge
| Method | Description |
|---|---|
| CAN → Ethernet → Wi-Fi | Used a the CAN-ethernet bright and a Ubiquiti Wi-Fi stick during the 2018 ASC. Experienced connection issues during the 2018 FSGP |
| CAN → LTE (RPi) → Internet → Wi-Fi | Used the RPi to connect to a pub-sub server on the internet via a LTE dongle during the 2019 FSGP. The pit stop listened to the server via the Wi-Fi |
| CAN → Wi-Fi | We can consider a low-power Wi-Fi MCU, such as ESP32 |
| CAN → LoRa | We may need to filter or delay non-essential CAN messages due to limited bandwidth |
| CAN → Wi-Fi → LTE (Phone) | We can use a portable LTE hotspot or a phone to connect the Wi-Fi to the internet |
LTE Coverage
| Location | LTE Coverage |
|---|---|
| Heartland Motorsports Park | All carriers |
| Topeka - Kansas City | All carriers |
| Stage 1 | Verizon and AT&T |
| Stage 2 | Verizon: 90%; poor reception around Whiskey Park |
| Stage 3 | Verizon: 90% |
| Stage 4 | All carriers |
Follow-up Car
This will have a web-app on someones laptop that will be able to view and log all the important data about the car's performance.
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