Run FPVSIM Timer V5 Auto Calibration
Use FPVSIM Timer V5 automatic calibration to set detection thresholds quickly and consistently.
Learn the improved FPVSIM Timer V2.1 calibration workflow and how it makes lap detection easier to tune.
What this tutorial covers
Timer 2.1 added an RSSI trend graph with visible enter and leave lines, making it easier to see a VTX power-up, a passing signal, and slow receiver drift. The video also explains the wireless cost of continuous monitoring.
This is a legacy diagnostic workflow. Current Timer releases include newer calibration tools, but the core lesson remains useful: inspect the trace, distinguish a real pass from baseline drift, and turn off high-traffic monitoring after troubleshooting.
Before using the graph
- Timer app and firmware versions that match one another.
- A quad or VTX set to the channel selected in the Timer app.
- The timer installed at its real course position and allowed to reach a stable operating temperature.
- A short test plan that includes VTX off, VTX on, several normal passes, and VTX off again.
- A stable connection before enabling continuous RSSI monitoring.
Read the RSSI trend safely
- Confirm matching software and firmware.
The recorded 2.1 feature required both sides to be updated to 2.1.0. For a current unit, install only the firmware explicitly intended for that hardware.
- Observe the powered-off baseline.
Let the graph settle before powering the VTX so normal receiver drift and background noise are visible.
- Power the VTX and fly representative passes.
Look for the signal rise, the crossing above enter, and the return below leave. Compare several passes rather than tuning from one sample.
- Account for temperature drift.
The RX5808 receiver shown can change its reported RSSI as it warms. Do not mistake a slow baseline movement for a quad crossing.
- Adjust the peak only when necessary.
Use the graph to select a value below consistent real peaks but above unrelated course noise, or use the current automatic calibration workflow when available.
- Disable monitoring after diagnosis.
The video notes that streaming the graph adds Wi-Fi traffic. Turn it off for a race if the current app recommends doing so.
Do not mix firmware generations.
The video's 2.1.0 update instruction applies to the hardware shown. Confirm the exact model and current release guidance before flashing any timer.
Edited transcript
This transcript was cleaned from the public English captions. The version numbers and hardware behavior describe the Timer 2.1 release demonstrated in the video.
About 00:00
Timer 2.1 improves calibration by displaying an RSSI trend graph. The enter and leave thresholds appear as horizontal lines, so you can see how the signal relates to both values. Powering the quad makes the RSSI rise, and unplugging it makes the signal return toward the baseline.
About 01:00
Several samples make the relationship clearer than a single number. Watch the graph while the quad approaches and leaves the timing point, then set the peak from the representative crossings rather than from nearby flight.
About 01:30
The RX5808 receiver can drift as its temperature changes, so the reported RSSI may move even when the quad is not passing. The graph makes that slow change visible and still allows a peak value to be selected manually when necessary.
About 02:10
Live RSSI monitoring also creates additional Wi-Fi traffic. Use it while calibrating or diagnosing a problem, then turn monitoring off to make the wireless timing connection more robust during a race.
About 02:35
To use the feature shown in this release, both the firmware and Timer software had to be updated to version 2.1.0. Always match the application and firmware intended for your particular timer hardware.
Frequently asked questions
Why does RSSI move when the quad is not passing?
Receiver temperature, background RF activity, and noise can move the baseline. A real pass normally produces a faster, repeatable shape tied to the timing line.
Should I leave the live graph enabled during every race?
The video recommends disabling its continuous monitoring after calibration because it adds Wi-Fi traffic. Follow the current app guidance for your connection mode.
Do I need Timer 2.1.0 today?
Only if that is the supported release for the legacy hardware you are maintaining. Current hardware may require a different app and firmware; never flash by video version alone.
Is manual peak selection still the preferred method?
Newer Timer releases offer automatic calibration. Use the graph as a validation and diagnostic tool, then make small manual changes only when the saved evidence supports them.
