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  • Already needed for the front display
  • Tested in 2019 FSGP

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  • Close to the front; might have reception issues with the chase car

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  • Supports external antenna for optimal placements

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  • Requires a new carrier board

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  • Tested in 2018 ASC
  • Requires a long range wifi router for FSGP (cost around $460)

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  • Requires a new low-profile antenna (mechanical might not like the antenna sticking out)

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PCAN Wireless Gateway

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  • Turnkey solution

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  • Expensive ($500)
  • The Wi-Fi antenna might not be as good as the 2018 ASC Ubiquiti one

Design

Image Added

Wireless Protocols

We should consider to a combination of options to ensure a stable connection during ASC and FSGP

ProtocolRange/Coverage
Data Rate
TheoreticalMeasured
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 kbpsLTE/LTE-M

Pi 3+:

54.6 Mbps (Upload)

42.1 Mbps (Download)

LTE

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 kbpsCAN= 500 kps

CAN-Wireless Bridge

MethodDescriptionCAN → Ethernet → Wi-FiUsed a the CAN-ethernet bright and a Ubiquiti Wi-Fi stick during the 2018 ASC. Experienced connection issues during the 2018 FSGPCAN → LTE (RPi) → Internet → Wi-FiUsed 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-FiCAN → Wi-FiWe can consider a low-power Wi-Fi MCU, such as ESP32CAN → LoRaWe may need to filter or delay non-essential CAN messages due to limited bandwidthCAN → Wi-Fi → LTE (Phone)We can use a portable LTE hotspot or a phone to connect the Wi-Fi to the internet

> 2 Mbps (Upload)

> 5 Mbps (Download)

SIM7600X:

> 0.68 Mbps (Upload)

> 6.27 Mbps (Download)

CAN
= 500 kps

LTE Coverage

LocationLTE Coverage
Heartland Motorsports ParkAll carriers
Topeka - Kansas CityAll carriers
Stage 1Verizon and AT&T
Stage 2

Verizon: 90%; poor reception around Whiskey Park

Stage 3 Verizon: 90%
Stage 4All carriers

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