PIDflight Lap supports lap timing of multiple pilots (aka multi-pilot) when more than one single VTx lap timing device is linked in a daisy chain configuration via the serial interfaces — OR — using a single VTx lap timing device with virtual timers.

Please note only firmware 2.x.x supports multi-pilot functionality.

• Activate up to 4 virtual lap timers on a single physical lap timing device
• Connect up to 8 physical lap timing devices together
• Mix virtual and physical lap timers together

There are two flavours of multi-pilot support, and they can be used together!

1. Dedicated lap timer is where one physical lap timer is dedicated to monitor the signal strength of a single frequency.
2. Virtual lap timer is where one physical lap timer is configured to monitor the signal strength of one or more frequencies.

For example, a 4-pilot build can be configured in the following way:

• 4 physical lap timers for dedicated lap timing of 4 frequencies.
• 2 physical lap timers using two virtual lap timers each for timing of 4 frequencies.
• 1 physical lap timer using four virtual lap timers for timing of 4 frequencies.

Please note the virtual lap timers switch between frequencies, this takes ~30 milliseconds per frequency and may affect accuracy and precision.

• First device: This is typically the communication module (e.g. HC-06). Connect the “TX" pin to the “RX" pin of the first lap timing device.
• Next device (N..N): Connect the “TX" pin to the next device’s “RX" pin.
• Last device: Connect the “TX" pin to the first device (e.g. HC-06) “RX" pin to complete the chain.

The following image is a typical connection diagram linking 4 lap timing devices with a HC-06 Bluetooth module.