TRÅDFRI motion sensor.
- Battery: 2x CR2032
The module is easy to take apart, and debug wires can be soldered on without separating the radio / MCU PCB from the carrier PCB. The carrier board is labelled "D-Sensor-A1-01-A-V2.0".
| Module Pin | Signal |
|---|---|
| PA0 | Switch Input |
| PA1 | Timer Input (Voltage Divider) |
| PB12 | Nothing? Has a capacitor position |
| PB13 | Photoresistor Analog |
| PB14 | PIR Interrupt |
| PB15 | Day/Night Analog |
| PC10 | PIR Serial Connection |
| Test Point | Signal |
|---|---|
| TP1_X | Day/Night Potentiometer Analog |
| TP2_X | Photoresistor Analog Output |
| TP3_X | Ground |
| TP4_X | Switch Output |
| TP5_X | Timer Potentiometer Analog |
| TP7_X | LED |
| TP8_X | Power Supply |
- Time selection dial (R13): PA1 (Looks like a potentiometer between R12 high side and a FET to GND enabled directly by PB14.)
- Day/night selection dial (R15): PB15 (Dito, with resistor R14 and same transistor.)
- Pairing button (S1): Silicone rubber button puling PA0 directly to GND
The motion detection dome is connected (one pin directly, one indirectly) to an "E93196C 5090C 9A" labelled 8-pin chip to which also PC10 and PB14 are connected (needs further investigation).