Shelly Plus Add-On sensori moodul

1 analog input: ANALOG IN
1 digital input: DIGITAL IN
1 reference voltage output: VREF OUT
1 reference voltage through a pull-up resistor output: VREF + R1 OUT
2 ground terminals: GND*

1-Wire interface
3 sensor power supply outputs (connected to the same PCB track): VCC
3 sensor data terminals (connected to the same PCB track): DATA
3 ground terminals: GND*
Connected to the same PCB ground layer.

Add-on interface
Shelly proprietary serial interface to connect to a Shelly Plus device

Supported sensors:
Up to 5 DS18B20
Single DHT22
NTC resistors with 10 kΩ nominal resistance and β=4000 K
Photoresistors
PIR sensors
Soil moisture sensors
Ultrasonic proximity sensors
Capacitive liquid level sensors
Sound detectors
Other analog sensors with 0 to 10 V output voltage

Size (HxWxD): 37x42x15 ±0.5 mm / 1.46 x 1.65 x 0.59 ±0.02 in
Weight: 105 g / 3.70 oz
Shell material: Plastic
Screw terminals max torque: 0.1 Nm / 0.89 lbIn
Conductor cross section: max. 1 mm² / 17 AWG
Conductor stripped length: 4.5 mm / 0.18 in
Color: Black
Ambient temperature: -20 °C to 40 °C / -5 °F to 105 °F
Humidity: 30 % to 70 % RH
Max. altitude 2000 m / 6562 ft
Power supply voltage AC:  N/A
Power supply voltage DC: 3.3 V (from Shelly plus device)
Power consumption: < 0.5 W (without sensors)

Output circuits ratings
VCC max. current: 10 mA
VREF OUT max. current: 1 mA
VREF+R1 OUT resistor: 10 kΩ

Shelly Plus devices: Shelly Plus 1, Shelly Plus 1PM, Shelly Plus 1 UL, Shelly Plus 1PM UL, Shelly Plus 2PM, Shelly Plus 2PM UL, Shelly Plus i4, Shelly Plus i4DC, Shelly Plus 0-10V Dimmer PM, Shelly Plus RGBW PM

Shelly Gen3 devices: Shelly 1 Gen3, Shelly 1PM Gen3, Shelly 2PM Gen3, Shelly Shutter, Shelly i4 Gen3, Shelly DALI Dimmer Gen3, Shelly Dimmer 0/1-10V PM Gen3, Shelly EM Gen3

Shelly Gen4 devices: Shelly 1 Gen4, Shelly 1PM Gen4, Shelly 2PM Gen4

Temperature reading: Depends on the DS18B20 or DHT22 sensors
Humidity reading: Depends on the DHT22 sensor
Digital input: -15 V to 0.5 V (True) / 2.5 V to 15 V (False)* 
Analog input range: 0 to 100% 
Analog input report threshold: 1%**
Voltmeter range: 0 to 10 V
Voltmeter report threshold: 0.1 V** 
Analog input / Voltmeter accuracy: Better than ±5%