Shelly Plus Add-On Sensor Interface

The Shelly Plus Add-on is a versatile sensor interface compatible with most Arduino sensors. Utilize its digital or analog inputs to measure your desired parameters such as temperature and humidity or connect various analog and digital sensors.  Create complex automation scenes based on the sensor data.   Specifications Physical Size (HxWxD): 37x42x15 ±0.5 mm / 1.46 x 1.65 x 0.59 ±0.02 in Weigh: 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 Environmental Ambient temperature: -20 °C to 40 °C / -5 °F to 105 °F Humidity 30 % to 70 % RH Max. altitude 2000 m / 6562 ft Electrical 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 device firmware capabilities Shelly Plus Addon supporting devices: 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% * Logic can be inverted in the digital input settings ** Can be configured in the analog input / voltmeter settings Basic wiring diagrams           Legend Terminals External sensor pins VCC Sensor power supply terminals VCC/VDD Sensor power supply pins DATA 1-wire data terminals DATA/DQ Sensor data pins GND Ground terminals GND Ground pins ANALOG IN Analog input     DIGITAL IN Digital input     VREF OUT Reference voltage output     VREF+R1 OUT Reference voltage through a pull-up resistor* output     *For passive devices that need it to form a voltage divider.