17 KiB
17 KiB
Boron LTE Security Device Wiring Diagram
Complete System Wiring
┌────────────────────────────────────┐
│ PARTICLE BORON LTE │
│ │
│ ┌─────┐ ┌─────┐ ┌─────┐ ┌─────┐ │
│ │ 3V3 │ │ RST │ │VBAT │ │ GND │ │
│ └─────┘ └─────┘ └─────┘ └─────┘ │
│ │
│ ┌─────┐ ┌─────┐ ┌─────┐ ┌─────┐ │
│ │ A0 │ │ A1 │ │ A2 │ │ A3 │ │
│ └─────┘ └─────┘ └─────┘ └─────┘ │
│ │
│ ┌─────┐ ┌─────┐ ┌─────┐ ┌─────┐ │
│ │ A4 │ │ A5 │ │ SCK │ │MISO │ │
│ └─────┘ └─────┘ └─────┘ └─────┘ │
│ │
│ ┌─────┐ ┌─────┐ ┌─────┐ ┌─────┐ │
│ │MOSI │ │ D8 │ │ D7 │ │ D6 │ │
│ └─────┘ └─────┘ └──┬──┘ └─────┘ │
│ │ │
│ ┌─────┐ ┌─────┐ ┌─────┐ ┌─────┐ │
│ │ D5 │ │ D4 │ │ D3 │ │ D2 │ │
│ └─────┘ └─────┘ └──┬──┘ └──┬──┘ │
│ │ │ │
│ ┌─────┐ ┌─────┐ ┌─────┐ ┌─────┐ │
│ │ D1 │ │ D0 │ │ TX │ │ RX │ │
│ └─────┘ └─────┘ └─────┘ └─────┘ │
│ │
│ ┌─────┐ ┌─────┐ ┌─────┐ ┌─────┐ │
│ │ GND │ │ GND │ │ VIN │ │ EN │ │
│ └──┬──┘ └─────┘ └──┬──┘ └─────┘ │
└─────┼─────────────────┼────────────┘
│ │
│ │
┌───────────┼─────────────────┼───────────┐
│ │ │ │
│ │ │ │
┌─────────▼─┐ ┌─▼─┐ ┌─▼─┐ ┌─▼─────────┐
│ MICROSWITCH│ │GND│ │VIN│ │ LI-PO │
│ NC │ └───┘ └───┘ │ BATTERY │
│ ┌───┐ ┌───┐│ │ │
│ │COM│ │ NC││ │ 3.7V │
│ └─┬─┘ └─┬─┘│ │ 5000mAh+ │
└───┼─────┼──┘ └───────────┘
│ │ │
│ └──────────────────────────────────────────────┘
│ │
│ │
┌────▼────┐ │
│ D2 │◄──────────────────────────────────────────────┘
│(INPUT) │
└─────────┘
┌─────────────────────────────────────┐
│ ALARM CIRCUIT │
│ │
│ D3 ──┬── 1kΩ ──┬── BASE │
│ │ │ (2N2222) │
│ GND ┌▼┐ │
│ │ │ │
│ │▼│ │
│ └┬┘ │
│ │ │
│ │ EMITTER │
│ │ │
│ GND │
│ │
│ │ COLLECTOR │
│ │ │
│ ┌─────▼─────┐ │
│ │ SIREN │ │
│ │ 12V │ │
│ │ 2A MAX │ │
│ └─────┬─────┘ │
│ │ │
│ ┌─────▼─────┐ │
│ │ VIN │ │
│ │ (3.7-12V)│ │
│ └───────────┘ │
└─────────────────────────────────────┘
┌─────────────────────────────┐
│ OPTIONAL SOLAR │
│ │
│ ┌─────────────────────┐ │
│ │ SOLAR PANEL │ │
│ │ 6V 1W+ │ │
│ └──────┬──────────────┘ │
│ │ │
│ ┌──────▼──────────────┐ │
│ │ CHARGE CONTROLLER │ │
│ │ (SparkFun Sunny │ │
│ │ Buddy) │ │
│ └──────┬──────────────┘ │
│ │ │
│ └───────┬───────────┘
│ │
└─────────────────┼─────────────
│
┌──────▼──────┐
│ LI-PO │
│ BATTERY │
│ + JST │
│ CONNECTOR │
└─────────────┘
Pin Connections Summary
| Component | Boron Pin | Connection Type | Notes |
|---|---|---|---|
| Microswitch Common | D2 | Digital Input (Pullup) | NC switch configuration |
| Microswitch NC | GND | Ground | Normally closed contact |
| Alarm Control | D3 | Digital Output | Controls transistor base |
| Status LED | D7 | Built-in | On-board LED |
| Battery Positive | VIN | Power Input | 3.7V Li-Po nominal |
| Battery Negative | GND | Ground | Common ground |
Microswitch Detail
MICROSWITCH (NC - Normally Closed)
Normal State (Secured):
┌─────────────┐
│ │ ● │ ← Actuator pressed
│ ──┼─── │
│ COM │ NC │
│ ● │ ● │
└─────┼──┼────┘
│ │
│ └─── GND (Boron) ──┐
│ │
└───── D2 (Boron) ────┼─── CLOSED CIRCUIT
│ D2 = HIGH (3.3V)
┌▼┐
│ │ 10kΩ internal pullup
│▼│
└┬┘
│
3V3
Breach State (Triggered):
┌─────────────┐
│ ● │ ← Actuator released
│ │
│ COM NC │
│ ● ● │ ← OPEN CONTACTS
└─────┼───┼───┘
│ │
│ └─── GND (Boron) ──┐
│ │
└──── D2 (Boron) ──────┼─── OPEN CIRCUIT
│ D2 = LOW (0V via GND)
┌▼┐
│ │ Current flows to GND
│▼│
└┬┘
│
GND
Alarm Driver Circuit Detail
TRANSISTOR ALARM DRIVER (NPN 2N2222)
Alarm OFF (D3 = LOW):
D3 ──┬── 1kΩ ──┬── BASE = 0V
│ │
GND ┌▼┐ No base current
│ │ Transistor OFF
│▼│
└┬┘
│
GND EMITTER = 0V
│ COLLECTOR = Floating
│
┌─────▼─────┐
│ SIREN │ ← No current flow
│ OFF │ SIREN = OFF
└─────┬─────┘
│
VIN (Battery voltage)
Alarm ON (D3 = HIGH):
D3 ──┬── 1kΩ ──┬── BASE = 3.3V
│ │
GND ┌▼┐ Base current flows
│ │ Transistor ON
│▼│
└┬┘
│
GND EMITTER = 0V
│ COLLECTOR = ~0V (saturated)
│
┌─────▼─────┐
│ SIREN │ ← Current flows VIN→Siren→Collector
│ ON │ SIREN = ON (Full battery voltage)
└─────┬─────┘
│
VIN (Battery voltage)
Power Distribution
POWER SYSTEM ARCHITECTURE
┌─────────────────┐ ┌──────────────────┐
│ SOLAR PANEL │ │ LI-PO BATTERY │
│ 6V 1W │ │ 3.7V │
│ │ │ 5000-10000mAh │
└────────┬────────┘ └─────────┬────────┘
│ │
│ ┌────────▼────────┐
└──────────────┤ CHARGE CONTROLLER├─── OPTIONAL
│ (Sunny Buddy) │
└────────┬────────┘
│
┌───────────────▼───────────────┐
│ BATTERY OUTPUT │
│ (JST Connector) │
└───────────────┬───────────────┘
│
┌──────────▼──────────┐
│ BORON VIN/GND │
│ (Power Input) │
└──────────┬──────────┘
│
┌───────────────▼───────────────┐
│ BORON POWER MGMT │
│ • 3.3V Logic Supply │
│ • Cellular Radio Power │
│ • GPIO Power (D3→Alarm) │
└───────────────────────────────┘
Component Specifications
Microswitch Requirements
- Type: SPDT (Single Pole, Double Throw) with NC contact
- Voltage Rating: 12V+ (any standard microswitch)
- Current Rating: 100mA+ (very low current for digital input)
- Mechanical Life: 10M+ cycles for reliability
- Mounting: Panel mount or lever actuated
- Examples: Cherry D44X, Omron SS-5GL, Honeywell 1SW1-1
Alarm Device Options
- Low Power Buzzer: 3-12V, <100mA (direct drive from D3)
- High Power Siren: 12V, 500mA-2A (requires transistor driver)
- Strobe Light: 12V, 200-500mA (requires transistor driver)
- Relay Output: For AC-powered alarms (requires relay driver)
Transistor Driver (for High Power Alarms)
- Type: NPN switching transistor
- Part: 2N2222, 2N3904, or similar
- Ratings:
- Collector Current: 500mA+ (for siren load)
- Collector-Emitter Voltage: 12V+
- Base Current: ~3mA (from D3 via 1kΩ resistor)
Battery Specifications
- Chemistry: Lithium Polymer (Li-Po) or Lithium Ion (Li-Ion)
- Voltage: 3.7V nominal (4.2V max, 3.0V min)
- Capacity: 5000-10000mAh for 2+ year operation
- Connector: JST or similar for easy replacement
- Protection: Built-in protection circuit recommended
- Temperature Range: -10°C to +60°C for outdoor use
Solar Panel (Optional)
- Voltage: 6V (to charge 3.7V battery via controller)
- Power: 1W minimum, 2W+ recommended for northern climates
- Type: Monocrystalline for efficiency
- Weather Rating: IP65+ for outdoor installation
- Charge Controller: Required to prevent overcharge
- SparkFun Sunny Buddy
- Adafruit Universal USB/Solar Lithium Ion/Polymer charger
- Similar MPPT solar charge controller
Installation Notes
1. Microswitch Mounting
- Mount securely to door/window frame
- Ensure proper gap (1-2mm) when closed
- Test mechanical operation before wiring
- Consider vibration and weather exposure
2. Alarm Device Placement
- Position for maximum deterrent effect
- Protect from weather if outdoor installation
- Ensure adequate power capacity (check battery drain)
- Test audibility at intended range
3. Enclosure Requirements
- Rating: IP65+ for outdoor use
- Size: Accommodate Boron + battery + connections
- Access: Serviceable battery compartment
- Mounting: Secure mounting points
- Ventilation: Battery safety (avoid gas buildup)
4. Power System
- Use proper JST connectors for battery
- Include inline fuse (2A) for protection
- Secure all connections against vibration
- Label positive/negative clearly
- Test polarity before connecting
5. Testing Procedure
- Bench Test: Verify all connections with multimeter
- Power Test: Check current consumption in sleep mode
- Function Test: Trigger microswitch, verify alarm
- Range Test: Verify cellular signal at installation site
- Endurance Test: 24-hour operation test before deployment