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ESP32-S3 CSI Firmware v0.1.0

01 Mar 07:45
@ruvnet ruvnet
v0.1.0-esp32
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ESP32-S3 CSI Firmware v0.1.0 Latest
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ESP32-S3 CSI Firmware v0.1.0

Pre-built firmware binaries for the ESP32-S3 CSI sensing pipeline (ADR-018).
Built from main with ESP-IDF v5.2 via Docker.

What's Included

File Size Flash Address Description
bootloader.bin 21 KB 0x0 ESP32-S3 second-stage bootloader
partition-table.bin 3 KB 0x8000 Flash partition layout
esp32-csi-node.bin 768 KB 0x10000 CSI firmware — ADR-018 binary streaming over UDP
provision.py — — NVS provisioning script (WiFi + network config)

Quick Start (No Build Required)

1. Install esptool:

pip install esptool

2. Flash all three binaries:

python -m esptool --chip esp32s3 --port COM7 --baud 460800 \
  --before default_reset --after hard_reset \
  write_flash --flash_mode dio --flash_freq 80m --flash_size 4MB \
  0x0 bootloader.bin \
  0x8000 partition-table.bin \
  0x10000 esp32-csi-node.bin

Replace COM7 with your serial port (/dev/ttyUSB0 on Linux, /dev/cu.usbserial-* on macOS).

3. Provision WiFi credentials (no rebuild needed):

python provision.py --port COM7 \
  --ssid "YourWiFi" --password "YourPassword" \
  --target-ip 192.168.1.20 --target-port 5005

4. Run the aggregator:

# From the wifi-densepose repo
cargo run -p wifi-densepose-hardware --bin aggregator -- --bind 0.0.0.0:5005 --verbose

Or use the Docker image:

docker run -p 3000:3000 -p 5005:5005/udp ruvnet/wifi-densepose:latest --source esp32

ADR-018 Binary Frame Format

Offset  Size  Field
0       4     Magic: 0xC5110001
4       1     Node ID
5       1     Number of antennas
6       2     Number of subcarriers (LE u16)
8       4     Frequency MHz (LE u32)
12      4     Sequence number (LE u32)
16      1     RSSI (i8)
17      1     Noise floor (i8)
18      2     Reserved
20      N*2   I/Q pairs (int8 pairs, n_antennas * n_subcarriers * 2)

Hardware Compatibility

Board Status Notes
ESP32-S3-DevKitC-1 Verified Tested with CP2102 USB-UART
ESP32-S3-WROOM-1 Expected Same SoC
ESP32-S3-MINI-1 Expected Same SoC
ESP32 (classic) Rebuild required idf.py set-target esp32
ESP32-C3 Not supported No CSI API

Firmware Features

  • WiFi STA + promiscuous mode for CSI capture on all management/data frames
  • ADR-018 binary serialization with 20-byte header + raw I/Q payload
  • UDP streaming to configurable aggregator (default 192.168.1.100:5005)
  • NVS runtime config — SSID, password, target IP/port, node ID
  • ~20 Hz CSI frame rate (LLTF + HT-LTF + STBC HT-LTF2)
  • 64-128 subcarriers per frame depending on bandwidth
  • Automatic WiFi reconnection (up to 10 retries)

Firewall Note (Windows)

netsh advfirewall firewall add rule name="ESP32 CSI" dir=in action=allow protocol=UDP localport=5005
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