motion_sensor

SinricPro Motion Sensor Example

Detects motion using a PIR sensor and reports to Alexa/Google Home.

Hardware Required

• ESP32 development board
• PIR motion sensor (HC-SR501 or similar)
• LED (optional, for visual indication)
• Jumper wires

Wiring

PIR Sensor    →  ESP32
VCC           →  5V or 3.3V
GND           →  GND
OUT           →  GPIO4

LED           →  GPIO2 (with 220Ω resistor)

Configuration

Edit main/motion_sensor_example.c:

#define WIFI_SSID      "YOUR_WIFI_SSID"
#define WIFI_PASS      "YOUR_WIFI_PASSWORD"
#define DEVICE_ID      "YOUR_DEVICE_ID"
#define APP_KEY        "YOUR_APP_KEY"
#define APP_SECRET     "YOUR_APP_SECRET"

Build and Flash

cd examples/motion_sensor
idf.py build flash monitor

Features

• Automatic motion detection
• Real-time event reporting to SinricPro
• Rate limiting (1 event per 60 seconds)
• LED indicator for motion state
• Alexa/Google Home notifications

Voice Commands

• "Alexa, is there motion in the living room?"
• Configure Alexa routines based on motion detection

Troubleshooting

No motion detected:

• Check PIR sensor wiring
• Adjust PIR sensitivity pot
• Wait 30-60 seconds for PIR to stabilize after power-on

Rate limiting:

• Motion sensor events are limited to 1 per 60 seconds
• This is a SinricPro server requirement