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Shelly Pro 2

Shelly Pro 2

Device Type: relay
Electrical Standard: euuk
Board: esp32

Information about the pinout and internals of the Shelly Pro 2.

It's the same board as the Shelly Pro 1. The only difference is the addition of a second relay.

Shelly Pro 2

Pinout

ESP32 DOWDQ6SN74HC595BLAN8720AComponent
GPIO 4RCLK
GPIO 13SER
GPIO 14SRCLK
GPIO 17CLKIN
GPIO 18MDIO
GPIO 19TXD0
GPIO 21TXEN
GPIO 22TXD1
GPIO 23MDC
GPIO 25RXD0
GPIO 26RXD1
GPIO 27CRS_DV
GPIO 35Reset Button
GPIO 36ADC Temperature
GPIO 38Switch input 1
GPIO 39Switch input 2

Shift register

A shift register is controlling the WIFI RGB LEDs and the 2 relays.

Shift Register

SN74HC595BComponent
QARelay 1 + Out 1 LED
QBRelay 2 + Out 2 LED
QCWIFI RGB LED (Blue)
QDWIFI RGB LED (Green)
QEWIFI RGB LED (Red)
QFNC
QGNC
QHNC

The Out 1 status LED and the relay 1 are on the same output. The same is true for the Out 2 status LED and the relay 2. Turning on the relay turns the corresponding LED on.

The WIFI LED is an RGB LED. By turning each component on or off, you have access to 8 configurations:

RGBColor
000OFF
001Blue
010Green
011Cyan
100Red
101Magenta
110Yellow
111White

Programming Pinout

Shelly Pro pinout

Note that the pin pitch is 1.27mm, so standard 2.54mm Dupont cables won't work.

Basic Configuration

esphome:
  name: shelly-pro-2


esp32:
  board: esp32dev
  framework:
    type: arduino




logger:


api:


ota:




wifi:
  ssid: !secret wifi_ssid
  password: !secret wifi_password
  ap:
    ssid: "Shelly-Pro-2"
    password: "BzwFc7HsRihG"


# ethernet:
#   type: LAN8720
#   mdc_pin: GPIO23
#   mdio_pin: GPIO18
#   clk_mode: GPIO17_OUT




captive_portal:


button:
  - platform: restart
    id: restart_1


binary_sensor:
  - platform: gpio
    id: reset_button
    pin:
      number: 35
      inverted: true
    on_click:
      min_length: 200ms
      max_length: 1000ms
      then:
        button.press: restart_1


  - platform: gpio
    id: input1
    pin:
      number: 38
    on_press:
      then:
        switch.toggle: relay1


  - platform: gpio
    id: input2
    pin:
      number: 39
    on_press:
      then:
        switch.toggle: relay2


sensor:
  - platform: adc
    id: temp_voltage
    pin: GPIO36
    attenuation: auto
  - platform: resistance
    id: temp_resistance
    sensor: temp_voltage
    configuration: DOWNSTREAM
    resistor: 10kOhm
  - platform: ntc
    sensor: temp_resistance
    name: Temperature
    unit_of_measurement: "°C"
    accuracy_decimals: 1
    icon: "mdi:thermometer"
    calibration:
      b_constant: 3350
      reference_resistance: 10kOhm
      reference_temperature: 298.15K
    on_value_range:
      - above: 90
        then:
          - switch.turn_off: relay1
          - switch.turn_off: relay2


sn74hc595:
  - id: 'sn74hc595_hub'
    data_pin: GPIO13
    clock_pin: GPIO14
    latch_pin: GPIO4
    sr_count: 1


switch:
  - platform: gpio
    name: "Relay 1"
    id: relay1
    pin:
      sn74hc595: sn74hc595_hub
      number: 0
      inverted: false


  - platform: gpio
    name: "Relay 2"
    id: relay2
    pin:
      sn74hc595: sn74hc595_hub
      number: 1
      inverted: false


  - platform: gpio
    id: wifi_led_blue
    pin:
      sn74hc595: sn74hc595_hub
      number: 2
      inverted: true


  - platform: gpio
    id: wifi_led_green
    pin:
      sn74hc595: sn74hc595_hub
      number: 3
      inverted: true


  - platform: gpio
    id: wifi_led_red
    pin:
      sn74hc595: sn74hc595_hub
      number: 4
      inverted: true
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