berkus
/
wifi-densepose
mirror of https://github.com/ruvnet/wifi-densepose.git
1
0
Fork 0
Code Issues Packages Projects Releases Wiki Activity
wifi-densepose/assets/sensors
History
arsen 2538fa2fab docs: import hardware photos + sensor inventory 
9 photos of the additional sensor/antenna hardware staged for ADR-120+
experimentation (captured 2026-05-18):

  sensor_01  5× u.FL pigtail antennas (bare)
  sensor_02  4× flat PCB-strip 2.4 GHz antennas w/ 3M backing + u.FL
  sensor_03  HLK-LD2402 24 GHz mmWave radar (close-up, chip S1KM0008)
  sensor_04  CP2102 USB-to-UART bridge (AMS1117-3.3 LDO)
  sensor_05  HLK-LD2402 + USB-UART wired together (working setup)
  sensor_06  ESP32-S3 dev board with microSD slot (back)
  sensor_07  ESP32-S3-WROOM with OV-camera + ribbon FFC mounted
  sensor_08  YD-ESP32-23 2022-V1.3 (back) — spare matching nodes 1-6
  sensor_09  YD-ESP32-23 (front) — ESP32-S3-N16R8 + FTDI

assets/sensors/README.md catalogues each photo + suggests where each
piece fits in the roadmap:
  * u.FL antennas → attach to n1/n5 (near-AP, sep_ratio ~0.05 per ADR-118)
  * HLK-LD2402 → vitals ground-truth reference for WiFi pipeline
  * Camera-ESP32-S3 → on-device camera capture for WiFlow Pack E.2 retrain
  * YD-ESP32-23 spare → flashable as node 7 when needed

Photos referenced only from this README, not used by any code path.

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>
 		2026-05-18 11:09:45 +07:00
..
README.md docs: import hardware photos + sensor inventory 2026-05-18 11:09:45 +07:00
sensor_01.jpeg docs: import hardware photos + sensor inventory 2026-05-18 11:09:45 +07:00
sensor_02.jpeg docs: import hardware photos + sensor inventory 2026-05-18 11:09:45 +07:00
sensor_03.jpeg docs: import hardware photos + sensor inventory 2026-05-18 11:09:45 +07:00
sensor_04.jpeg docs: import hardware photos + sensor inventory 2026-05-18 11:09:45 +07:00
sensor_05.jpeg docs: import hardware photos + sensor inventory 2026-05-18 11:09:45 +07:00
sensor_06.jpeg docs: import hardware photos + sensor inventory 2026-05-18 11:09:45 +07:00
sensor_07.jpeg docs: import hardware photos + sensor inventory 2026-05-18 11:09:45 +07:00
sensor_08.jpeg docs: import hardware photos + sensor inventory 2026-05-18 11:09:45 +07:00
sensor_09.jpeg docs: import hardware photos + sensor inventory 2026-05-18 11:09:45 +07:00

README.md

Sensor & antenna hardware inventory

Photos of the additional sensor + antenna hardware staged for ADR-120+ experimentation in this deployment. Captured 2026-05-18.

File What it is Role
sensor_01.jpeg 5× u.FL (IPEX-1) pigtail antennas, bare cable External antenna feed for ESP32-S3 boards that have a u.FL connector but currently use the on-PCB chip antenna. Adds gain + diversity once attached.
sensor_02.jpeg 4× flat PCB-strip antennas (2.4 GHz, FR4 copper trace, 3M double-sided tape backing) + u.FL pigtails Stick-on external antennas — better gain than the chip antenna, doubles as polarisation diversity if mounted perpendicular to one another.
sensor_03.jpeg HLK-LD2402 24 GHz mmWave radar module (V1.0, chip S1KM0008 2438 batch), TX/RX patch antennas, UART output New modality. mmWave gives sub-mm range to a moving target — useful for vital-sign disambiguation alongside WiFi CSI. UART @ 256000 8N1.
sensor_04.jpeg CP2102 USB-to-UART bridge (AMS1117-3.3 LDO, USB-A) Powers + reads the HLK-LD2402 from a Mac/Linux host. Pin map: GND / RXT / TXD / 3.3V / RTS / CTS.
sensor_05.jpeg The two boards from sensor_03 + sensor_04 wired together Working HLK-LD2402 setup ready to receive on a USB tty (no firmware needed — module ships with its own factory firmware).
sensor_06.jpeg Back of ESP32-S3 dev board with microSD slot, marked "Camera / SD Card / PSRAM", dual USB-UART + USB-OTG Different board family from the 6 already in service. SD slot + USB-OTG + on-board camera connector make it a candidate for on-device camera ground-truth capture (alternative to using the Mac webcam for ADR-079 / Pack E.2 retraining).
sensor_07.jpeg ESP32-S3-WROOM with OV-camera mounted + camera ribbon FFC connector Same board family as sensor_06. Camera ribbon already attached. With WiFi CSI + onboard camera in one device, this could collect synchronised paired data (CSI + image) entirely without involving the Mac — the missing piece for the wiflow fine-tune Pack E.2.
sensor_08.jpeg Back of YD-ESP32-23 2022-V1.3 (V2356) dev board Same board family as the 6 currently provisioned (nodes 1-6). Spare.
sensor_09.jpeg Front of YD-ESP32-23: ESP32-S3-N16R8 WiFi+BT module, FTDI USB-serial, RGB LED, dual USB-C Confirms it's the same hardware we flashed for nodes 3-6 (FT232R serial chip on board, see /dev/cu.usbserial-A5069RR4 during provisioning).

Suggested next moves

  • u.FL antennas (sensor_01/_02) — attach to the two "near-AP" nodes (n1, n5) which currently sit at sep_ratio ~0.05 per the ADR-118 audit. External antenna oriented perpendicular to the body axis should pull more body modulation into the signal.
  • HLK-LD2402 mmWave (sensor_03–05) — start as a vitals ground-truth reference for the WiFi pipeline. Connect via the USB-UART, log breathing rate at the same time as the WiFi vitals detector, compare. Later fuse via MultistaticFuser if accuracy improves materially (would warrant a fresh ADR).
  • Camera-bearing ESP32-S3 (sensor_06/_07) — the cleanest path to Pack E.2 (WiFlow camera-supervised retrain): collect synced (CSI, MediaPipe keypoints) pairs entirely on-device. Avoids the awkward "laptop is the camera AND the server AND in the sensing zone" problem from the earlier session.
  • Spare YD-ESP32-23 (sensor_08/_09) — flash with the same build + provision.py --node-id 7 if/when a 7-node deployment is desired. Bring-up is 5 min per the ADR-117 OTA recipe.

These are reference photos only — not used by any code path. Linked from docs/use-cases.md and CHECKLIST.md Deferred section so future sessions can see the available hardware at a glance.