WifiLapper Tablet Edition

WifiLapper lets you send telemetry and laptimes car->pit with consumer hardware.

WifiLapper is a GPS laptimer, data logger, and telemetry transmitter oriented towards endurance car racing. It has a large, easy to read display so that drivers remain informed but not distracted, and can interface with external OBD2, IOIO and GPS units so that you record more and better data.

Note: Tablet Edition is identical to the other versions except it doesn't require SMS capability, so it should be installable on tablets. You can still use the Pitside app (see website) to send messages to your driver, though you don't get the acknowledgement message sent back.

For full details, please visit sites.google.com/site/wifilapper

Once a lap, WifiLapper can transmit recorded data via a wifi network to a pitside laptop for further analysis. The Pitside application is free to download from the WifiLapper website.

Messages can be sent from the pits to the driver either via Pitside or via SMS. Normal text messages are kept private by requiring a certain prefix on text messages meant for the driver. Drivers can acknowledge texts by tapping the screen, and WifiLapper can optionally send a text back to the pits to inform them the driver got the message.

For drivers, WifiLapper displays their speed/distance graph and current lap delta (how ahead or behind they are at that moment, compared to their best-ever lap). Other optional displays can be selected as well, including current speed, and speed compared to their speed on their best lap.

Feature list:

-Transmission (no data plan required) of recorded data to a pitside laptop via Wifi.

-External bluetooth GPS units supported, to increase sample rates

-External bluetooth OBD2 units supported, to record parameters from the car's ECU such as coolant temperatures, oil pressures, and rich/lean ratios.

-Sparkfun IOIO chip is supported, to permit connections to analog sensors such as fuel levels, oil pressures and temperatures, EGTs, etc.

-Pit to driver message supported via pitside application and SMS messages.

For more instructions and the Pitside PC application, visit https://sites.google.com/site/wifilapper/

What's New in the Latest Version 1.38

Bug fixes: wifi connection failure, a few graphical improvements

New Features:
1. the accelerometer now can be calibrated (phones don't always read zero when flat).
2. the angle of the phone mount relative to the car can be compensated
3. Accelerometer readings can now be optionally filtered.
4. IOIO supports up to 20Hz sampling
5. IOIO sample rate no longer drifts.