Shelly 2.5 wireless switch with two relay for intelligent home automation, Amazon Alexa and Google Home.

Product Information

Do not connect AC power and the serial connection at the same time The GND connection of the Shelly is connected to the live AC wire. Connecting serial with your PC will fry your PC. Shelly 2.5 ~ I'll start by creating an ESPHome configuration for the Shelly 2.5. As usual, there's already one available on esphome-configs.io. I'm using the second one which includes protection against drawing too much current & over-temperature. Shelly 2.5 offers 5 different switch modes (momentary, toggle, edge, detached, activation) which can also be inverted which will suit every possible switch configuration that you may have at home. There isn’t so much of a difference from a technical perspective between light or outlet but it does matter when you refer to the objects from a voice assistant like Alexa or Google Home.

Activation switch: If SW1 state changes, relay always turns ON. No matter what happens at SW1 input, the relay stays ON until it is turned OFF by different means, a timer or motion sensor perhaps. This setting lets you set desired max power protection. It means that if the set power gets exceeded, Shelly 2.5 automatically turns the relay off. The Shelly relays allow you to toggle one or more channels on/off, give you the switch state and may give you info on power consumption and device temperature.

If you want to see Voltage and Frequency also when the relays are off, use SetOption21 1 Flash mode ~ This will be a very in-depth review so have a look to the topics that will be covered in case you are in a pinch and want to go straight to the point. Since a Shelly relay (e.g. Shelly 1 or 2.5) only supports on/off toggling, so it doesn’t really matter whether it’s configured as a light or a switch. The first will allow specifying a temperature, the second instead of a percentage of the valve position.

If you think your Shelly devices are working correctly and don’t want to change your network/configuration, you can ignore the repair issue. Still, you must know you are giving up the best experience of using first-generation Shelly devices with Home Assistant.

Shelly Plus 2PM

AC and 24-60V AC Shelly 2.5 is compatible with all major international voltage standards Wireless 802.11 b/g/n

In my experience, there was one time when the app didn’t detect the new Shelly 2.5 automatically, so I started a new inclusion search and, instead of my home wifi network, I chose the Access Point that the new Shelly 2.5 created. The app eventually found the devices and included it.

Next up, we have to configure Tasmota. Make sure your computer is physically near the Shelly and scan for WiFi networks. There should be a tasmota-XXXXX network. Connect to it.

Configuring a device as cover allows you to control things like blinds, curtains, shades, shutters, garage doors, … Tasmota will disable serial logging after a restart as the communication between Tasmota and the Energy Monitoring chip is using the same serial interface. Make sure not to enable SerialLog as it will interfere with the Energy Monitoring functionality. If you're looking for a smart switch that offers flexibility in device control and helps with energy efficiency, the Shelly 2.5 would be the better choice. On the other hand, if your needs include Bluetooth connectivity for easier device integration and specific controls for roller shutters or similar devices, then the Shelly Plus 2PM is the better option. Status updates: the entire status payload of components is published on /status/, controlled with the status_ntf configuration flag. Shelly 2.5 can be accessed, controlled and monitored remotely from any place where the User has internet connectivity, as long as the device is connected to a Wi-Fi router and the Internet.

devices.esphome.io

Shelly 2.5 and Sonoff DualR3 come with Shelly Cloud and eWeLink apps. These are well integrated into Google Assistant and Alexa ecosystems and offer cloud connectivity wherever you are. Both apps offer also standard features like individual channel control, power metering and timers and schedules. It’s the software that sets these two apart. Physical Switching I'm using an open-source tool called mg2x which converts the Shelly from running Mongoose OS to Tasmota. It supports the following models: The following diagrams will explain the different modes in a graphical way. Two-headed arrows show the moment when the button is pressed and relay state changes. 1 means ON-state and 0 means OFF state. Next, we are going to the settings found under the channel. Tap the first (or second) channel and you will see the next screen. switches/energy/shelly_3em.yaml - platform: mqtt name: "3EM - Relay" expire_after: 604800 qos: 1 command_topic: "shellies/shellyem3-/relay/0/command" state_topic: "shellies/shellyem3-/relay/0" # Remove the line below if the value_template doesn't function properly value_template: {{ 'on' if value == 'on' else 'off' }} # Test for capturing 'overpower' state - platform: mqtt name: "3EM - Phase A - Reset Totals" expire_after: 604800 qos: 1 optimistic: true payload_on: "reset_totals" payload_off: "" command_topic: "shellies/shellyem3-/emeter/0/command" - platform: mqtt name: "3EM - Reset Device Data" expire_after: 604800 qos: 1 optimistic: true payload_on: "reset_data" payload_off: "" command_topic: "shellies/shellyem3-/command" Shelly 4Pro ¶