c922e05266
On-device CSI wander calculation (coefficient of variation over 50-packet window). Rate drops to 10 Hz when idle, jumps to 100 Hz on motion with 3s holdoff. EVENT notifications sent to Pi on rate changes. New commands: ADAPTIVE ON/OFF, THRESHOLD. RATE command disables adaptive mode. All settings NVS-persisted.
179 lines
6.0 KiB
Markdown
179 lines
6.0 KiB
Markdown
# Cheatsheet
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## Environment Setup
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```bash
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source ~/esp/esp-idf/export.sh # Activate ESP-IDF (every shell)
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```
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## Build & Flash
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```bash
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cd ~/git/esp32-hacking/get-started/csi_recv_router
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idf.py set-target esp32 # Set chip target
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idf.py menuconfig # Configure WiFi/UDP settings
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idf.py build # Compile firmware
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idf.py -p /dev/ttyUSB0 flash # Flash to device
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idf.py -p /dev/ttyUSB0 monitor # Serial monitor (Ctrl+] to exit)
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idf.py -p /dev/ttyUSB0 flash monitor # Flash + monitor combined
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idf.py fullclean # Clean build directory
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idf.py reconfigure # Re-fetch managed components
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```
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## Deployed Sensors
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| Name | IP | mDNS | Location |
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|------|-----|------|----------|
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| muddy-storm | 192.168.129.29 | muddy-storm.local | Living Room |
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| amber-maple | 192.168.129.30 | amber-maple.local | Office |
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| hollow-acorn | 192.168.129.31 | hollow-acorn.local | Kitchen |
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**Target:** `192.168.129.11:5500` (Pi) | **Cmd port:** `5501`
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## Remote Management (esp-cmd)
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```bash
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esp-cmd <host> STATUS # Uptime, heap, RSSI, rate, version, adaptive, motion
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esp-cmd <host> IDENTIFY # LED solid 5s (find the device)
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esp-cmd <host> RATE 50 # Set ping rate to 50 Hz (disables adaptive)
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esp-cmd <host> POWER 15 # Set TX power to 15 dBm (NVS saved)
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esp-cmd <host> ADAPTIVE ON # Enable adaptive sampling (NVS saved)
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esp-cmd <host> ADAPTIVE OFF # Disable adaptive sampling
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esp-cmd <host> THRESHOLD 0.005 # Set motion sensitivity (NVS saved)
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esp-cmd <host> OTA http://pi:8070/fw # Trigger OTA update (use esp-ota instead)
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esp-cmd <host> REBOOT # Restart device
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```
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Host can be an IP or mDNS name (`amber-maple.local`).
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```bash
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esp-cmd amber-maple.local STATUS # Single device via mDNS
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esp-cmd 192.168.129.29 IDENTIFY # Single device via IP
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```
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## Fleet Management (esp-fleet)
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```bash
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esp-fleet status # Query all sensors at once
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esp-fleet identify # Blink all LEDs
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esp-fleet rate 50 # Set rate on all devices
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esp-fleet reboot # Reboot entire fleet
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esp-fleet ota # OTA update all (sequential)
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esp-fleet ota /path/to/firmware.bin # OTA with custom firmware
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```
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## OTA Updates (esp-ota)
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```bash
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esp-ota amber-maple.local # OTA with default build
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esp-ota amber-maple.local -f fw.bin # OTA with custom firmware
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esp-ota amber-maple.local --no-wait # Fire and forget
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```
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**First flash after enabling OTA requires USB** (partition table change).
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After that, all updates are OTA.
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### OTA Flow
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1. Verifies device is alive via STATUS
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2. Starts temp HTTP server on Pi (port 8070)
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3. Sends `OTA http://<pi>:8070/<fw>.bin` via UDP
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4. Device downloads, flashes, reboots
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5. Verifies device responds post-reboot
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### Rollback
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If new firmware crashes or hangs, the 30s watchdog reboots and bootloader
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automatically rolls back to the previous firmware.
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## Adaptive Sampling
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When enabled, the device automatically adjusts ping rate based on CSI wander:
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- **Motion detected** (wander > threshold): 100 pkt/s
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- **Idle** (wander < threshold for 3s): 10 pkt/s
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- Rate changes send `EVENT motion=<0|1> rate=<hz> wander=<value>` via UDP
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```bash
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esp-cmd amber-maple.local ADAPTIVE ON # Enable
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esp-cmd amber-maple.local THRESHOLD 0.005 # Tune sensitivity
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# Lower threshold = more sensitive, higher = less sensitive
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# Good starting range: 0.001 - 0.01
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```
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### LED States
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| LED | Meaning |
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|-----|---------|
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| Off | Not connected to WiFi |
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| Slow blink (1 Hz) | Connected, no CSI activity |
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| Fast blink (5 Hz) | CSI data flowing |
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| Solid (5s) | IDENTIFY command active |
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| Double blink | OTA in progress |
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## Test CSI Reception
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```bash
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nc -lu 5500 # Listen for CSI packets
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socat UDP-RECV:5500 STDOUT # Alternative listener
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nc -lu 5500 | head -1 # See one packet
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nc -lu 5500 | wc -l # Count packets/sec (Ctrl+C)
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```
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## Firmware Variants
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| Firmware | Dir | Output | Needs |
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|----------|-----|--------|-------|
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| csi_recv_router | `get-started/csi_recv_router/` | UDP | WiFi router |
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| csi_recv | `get-started/csi_recv/` | Serial | csi_send device |
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| csi_send | `get-started/csi_send/` | N/A | csi_recv device |
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## Key Config (menuconfig)
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| Path | Setting |
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|------|---------|
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| Example Connection Configuration → SSID | WiFi network name |
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| Example Connection Configuration → Password | WiFi password |
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| CSI UDP Configuration → IP | `192.168.129.11` |
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| CSI UDP Configuration → Port | `5500` |
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| CSI UDP Configuration → Cmd port | `5501` |
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| CSI UDP Configuration → Hostname | mDNS name (e.g., `amber-maple`) |
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## CSI Data Format
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```
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CSI_DATA,seq,mac,rssi,rate,sig_mode,mcs,cwb,smoothing,not_sounding,
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aggregation,stbc,fec_coding,sgi,noise_floor,ampdu_cnt,channel,
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secondary_channel,timestamp,ant,sig_len,rx_state,len,first_word,"[I,Q,...]"
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```
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## Source Paths
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| File | Purpose |
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|------|---------|
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| `get-started/csi_recv_router/main/app_main.c` | Main firmware source |
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| `get-started/csi_recv_router/main/Kconfig.projbuild` | UDP/cmd port config |
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| `tools/esp-cmd` | Pi-side management CLI |
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| `tools/esp-ota` | Pi-side OTA update tool |
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| `tools/esp-fleet` | Fleet-wide command tool |
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| `get-started/csi_recv_router/sdkconfig.defaults` | SDK defaults |
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| `get-started/csi_recv_router/main/idf_component.yml` | Dependencies |
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| `get-started/csi_recv_router/CMakeLists.txt` | Build config |
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## ESP-IDF Paths
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| Path | Contents |
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|------|----------|
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| `~/esp/esp-idf/` | ESP-IDF v5.5.2 |
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| `~/esp/esp-csi/` | Original esp-csi examples |
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| `~/.espressif/tools/` | Xtensa toolchain |
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## USB Serial
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```bash
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ls /dev/ttyUSB* /dev/ttyACM* # Find connected devices
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dmesg | tail # Check USB detection
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sudo usermod -aG dialout $USER # Fix permissions (re-login)
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```
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