Streaming CSI motion from paired ESP32-S3 devices through the DTW matcher. Watch the matcher resolve the lowest-cost template, then emit a gesture_recognized event with confidence and template_id.
Last recognition
—
—
confidence —
awaiting events…
Top match candidates
DTW distance · lower is better
live
Per-device CSI streams
All devices · aggregate
amplitude over time · rolling 5s
sample rate 100 Hzsubcarriers 52
Event stream
all gesture_recognized events since page load
Time
Gesture
Template
Device
Confidence
Latency
no events yet
Gesture templates
DTW reference templates trained from CSI motion captures. Each template stores normalized motion signatures; the matcher compares live streams against this library and emits a recognition when the lowest-cost template beats the threshold.
Capture multiple CSI motion repetitions of a single gesture. The matcher averages the aligned signatures to build a robust DTW reference. Aim for 8–15 clean repetitions across slightly different positions.
Template details
labels and routing for the new gesture
Capture
press record then perform the gesture · auto-stops after 2.0 s
window 2.0srate 100 Hz
idle
00:00 / 02:00
Capture summary
live as samples are added
samples
0 / 10
coherence
—
est. acc.
—
Record at least 8 samples before saving. Discard outliers to keep coherence high.
Tips
improve recognition quality
Stand 1–3 m from the ESP32-S3 with line-of-sight when possible.
Vary position slightly between samples — left, right, closer, further.
Keep the gesture window under 2 s for stable DTW alignment.
Avoid recording with other gestures happening nearby — CSI is whole-room.
If coherence drops, discard outliers rather than adding more samples.
ESP32-S3 devices
CSI sources for the gesture matcher. Each device captures WiFi Channel State Information at 100 Hz across 52 subcarriers and streams motion features to the recognizer.
Devices
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paired
Streaming
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CSI active
Mean RSSI
—
paired devices
Firmware
—
latest 0.5.0
Paired devices
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Name
ID
IP
Status
RSSI
CSI
Firmware
Settings
Tune the DTW matcher, set the confidence floor for emitted events, and wire gesture_recognized events to downstream sinks.
Matcher
controls how strictly the DTW path is compared and accepted
DTW thresholdMaximum normalized cost for a candidate to be considered a match. Lower = stricter.
0.72
Confidence floorEvents below this confidence are suppressed.
0.75
Window sizeSliding window length matched against each template.
Sakoe-Chiba bandConstrains the warping path to a diagonal band. Smaller = faster but less flexible.
15
Input
CSI capture pipeline
SourceHardware capture device family.
Sample rateCSI frames per second per device.
Subcarrier selectionWhich OFDM subcarriers feed the motion feature.