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How to: RaceCapture Telemetry at the 25 hours of Thunderhill

Level up your race craft with real-time data

Getting real-time data set up in your endurance race car will provide your crew and driver with critical, strategic information during your race:

  • The pit crew can monitor and coach the current driver’s performance in real-time – even compare their current laps against other drivers on the team
  • Connect a fuel level sensor, monitor fuel consumption and plan re-fueling strategy in advance
  • With even more sensors, the crew can also monitor engine health such as engine temperature and oil pressure
  • The driver can also see their lap times as they happen, using the mobile app dashboardrace_capture_telemetry_screen

Thunderhill Raceway and Verizon

Thunderhill Raceway has some unique constraints when it comes to internet connectivity: virtually nothing works except for Verizon. Thanks to the persistence of Thunderhill Raceway’s management team, Verizon invested significantly in on-site infrastructure and now their 4G LTE service is 5-bars spectacular where other providers like T-Mobile and AT&T are virtually non-existent. If you’re running RaceCapture/Pro telemetry at the 25 hour race, using Verizon is a must. Here’s what you need to do:

Use the RaceCapture mobile app for telemetry

With the RaceCapture/Pro system you have two telemetry options: the dedicated GSM real-time module, which can use any GSM sim card (T-Mobile, AT&T, etc), or- telemetry over bluetooth via the mobile app, which can use any provider, including GSM or Verizon’s CDMA network.

Setting up telemetry via the mobile app is straightforward – just follow these steps:

Get a Verizon connected Android device

If you don’t have one already, get an Android device that can connect to the Verizon Network.

  • An android phone with a Verizon service plan
  • An Android tablet with a Verizon SIM card
  • An Android tablet wifi-linked to a Verizon Hot Spot

If you’re buying an android tablet, choose a good quality unit with Bluetooth and an IPS screen for better brightness and contrast. The Samsung Galaxy Tab 3 and Google Nexus 7 are great choices.  To get your touchscreen to work with gloves, consider the AnyGlove drops we’re currently evaluating.

Get a Strong tablet mount

At the Thunderhill 24 Hours of LeMons event in September we used the phenomenal dual suction cup RAM mount for our Galaxy Tab 3. Unfortunately, the spacing between the end clamps on the mount were too wide for our tablet, so we removed the ends and attached it directly to the back plate with industrial hook and loop fastener, seen here:


Configure RaceCapture/Pro firmware settings

On top of your regular sensor configuration, set the following RaceCapture/Pro firmware settings:

  • Enable Bluetooth telemetry mode
  • Configure Start finish line for Thunderhill:
    • If running RaceCapture/Pro MK1, set the start/finish line to: 39.538471, -122.331182
    • If running RaceCapture/Pro MK2, select Thunderhill from the list of track maps for auto-detection
    • Set all of your telemetry channels to 10Hz max
    • Important: Enable Latitude, Longitude, Distance, Time, LapCount and LapTime channels (should be enabled by default) and set all to 10Hz.

Write the firmware settings back to the unit (and re-read to verify) – then save a copy for safe keeping.

Set up your Android device and RaceCapture app

Go to the device’s Bluetooth settings and pair the tablet with the RaceCapture Bluetooth module.

Install the RaceCapture app on your mobile device and connect the app to the RaceCapture/Pro Bluetooth module. After connecting you should see data updating on the sensor monitor screen.

Now, create a device on and configure the app with the Device ID provided:




Once you enable the Real-Time telemetry option and enter a valid Device ID,  you’ll see the green cloud icon light up in the upper left hand corner, providing the tablet is connected to the network. You’ll then see your streaming data under your event page.

Powering everything in the car

You will want to ensure your devices are powered correctly during the race:

  • Tablet: Ensure you have a proper 2 amp charger and that it can keep up with the tablet’s demands. Use a high quality charger and verify it’s performance in advance, as not all 2 amp chargers are created equally!
  • Verizon hot spot:– the same applies. These hot spots consume a lot of power while transmitting 4G LTE data -ensure the charger can keep up.
  • RaceCapture/Pro: Keep power applied during the entire race. If power is interrupted, the Bluetooth link will drop. Even though the app is designed to automatically re-connect, the Bluetooth stack on Android does not always cooperate, and the app may need to be re-started to fully recover. You’ll get the best results if you can hard-wire RaceCapture/Pro to always be on.

Have Questions? Drop us an email at [email protected] and lets talk about your setup!


3 thoughts on “How to: RaceCapture Telemetry at the 25 hours of Thunderhill

  1. How are you using Bluetooth and Live Telemetry? I thought you can only use one or the other? If this isn’t true, is there a write up of how to do this?

    1. Nevermind, I re-read where it says telemetry or bluetooth. Will the first gen race capture ever be capable of both or will I have to eventually upgrade to the new box. We have been successfully running the RaceCapture Pro this entire season and it has been a huge help in diagnosing problems. I just wish there was a simple solution to giving the driver their lap times while I monitor engine vitals in the pits. I would just use my cell phone, but I am already using it for UStream. I guess I need to pay for a 2nd phone to be activated and run the app from it.

      1. For MK1, There is an experimental Y-adapter we never officially released as it has some significant limitations. Essentially the BT module ‘spies’ on the traffic going to the cellular module, sending that on to the tablet. The limitations are that no data will update on the screen if the cell module goes out of range, or when the connection is being set up; also, communications is one-way only to the tablet.

        Your best bet might be to get a cellular enabled tablet like the Samsung Note 3 with a sim card slot; there you can run the app and then have the app perform telemetry directly. Look for a refurbished Note 3 with sim card for the best deal:

        We applied what we learned in MK1 and now MK2 has additional ports and can connect telemetry and BT at the same time.

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