Schematics
Simplified internal schematic.
Possible wiring connections.
VAC1 and VAC2 are the power supply of the Shelly Plus Uni.
Wiring color of DS18B20.
Below there are our wiring used for our application.
For an example of wiring see here, is in deutschland language.
I/O
Inputs
1 analog input – ANALOG IN
1 1-Wire data input – DATA
1 pulse counter input – COUNT IN
2 digital inputs – IN1 and IN2
Outputs
1 sensors power supply output – SENSOR VCC (5vcc)
2 potential-free contacts solid-state relay outputs – OUT1 and OUT2
Wiring colors
| VAC1 | Red | 8-24 VAC / 9-28 VDC power supply input 1 + |
| VAC2 | Black | 8-24 VAC / 9-28 VDC power supply input 2 – |
| ANALOG IN | White | Analog input |
| SENSOR VCC | Yellow | Power supply for 1-Wire sensors |
| DATA | Blue | 1-Wire data line |
| + 5 VDC | Gray | 5 VDC power supply positive input |
| GND | Green | 5 VDC power supply ground input and Sensor ground |
| COUNT IN | Purple | Counter input |
| IN1 | Orange | Digital input 1 |
| IN2 | Brown | Digital input 2 |
| OUT 1 | Black | Solid-state relay 1 terminals |
| OUT 2 | Black | Solid-state relay 2 terminals |
Specifications
| Type | Value |
|---|---|
| Physical | |
| PCB size (LxWxH): | 40 x 21 x 7 mm / 1.57×0.83×0.28 in |
| Weight: | 8.5 g / 0.3 oz (with the cables) |
| Environmental | |
| Ambient temperature: | -20 °C to 40 °C / -5 °F to 105 °F |
| Humidity | 30 % to 70 % RH |
| Electrical | |
| Power supply: | 8-24 VAC 9-28 VDC 5 VDC (stabilized, via +5 VDC and GND OUTPut) |
| Power consumption: | < 1 W (at 12 Vdc is 20 mA) |
| Input circuits ratings | |
| Digital inputs resistance: | 50 kΩ |
| Digital inputs triggering voltage: | 1.5 V (active low level) |
| Output circuits ratings | |
| Max switching voltage: | 30 V |
| Max switching current: | 300 mA |
| Sensors, meters | |
| Voltmeter: | 0-15 VDC / 0-30 VDC (Two-range) |
| Voltmeter accuracy: | |
| Pulse counter input triggering voltage: | 1.5 V (active low level) |
| Pulse counter max frequency: | 1 kHz |
| External sensors supported: | Single DHT22 or up to five DS18B20 |
| Radio | |
| RF band: | 2400 – 2495 MHz |
| Max. RF power: | <20 dBm |
| Wi-Fi protocol: | 802.11 b/g/n |
| Wi-Fi Range: | Up to 30 m / 100 ft indoors and 50 m / 160 ft outdoors (Depends on local conditions) |
| Bluetooth Protocol: | 4.2 |
| Bluetooth Range: | Up to 10 m / 33 ft indoors and 30 m / 100 ft outdoors (Depends on local conditions) |
| MCU | |
| CPU: | ESP32 |
| Flash: | 4 MB |
| Firmware capabilities | |
| Schedules: | 20 |
| Webhooks (URL actions): | 20 with 5 URLs per hook |
| Scripting: | Yes |
| MQTT: | Yes |
| CoAP: | No |
LED (monocolor) indication
AP (Access Point) enabled and Wi-Fi disabled:
1 second ON / 1 second OFF
Wi-Fi enabled, but not connected to a Wi-Fi network:
1 second ON / 3 seconds OFF
Connected to a Wi-Fi network:
Constantly ON
Cloud is enabled, but not connected:
1 second ON /5 seconds OFF
Connected to Shelly Cloud:
Constantly ON
OTA (Over the Air Update):
½ sec ON / ½ second OFF
Button pressed and held for 5 seconds:
½ second ON / ½ second OFF
Button presses and held for 10 seconds:
¼ second ON / ¼ second OFF
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