IoT - Install Shelly-2.5 module

I’ve got a Shelby, Shelly i don’t know her!#

Shelly is a Bulgarian company, based in Sophia, offering hardware and products for the IoT. Shelly is a serious competitor to products such as Fibaro, Qubino, Enocean, Sonoff…

Shelly products come with a cloud solution, an Android application and IoS. The aim here is a stand-alone solution that does not upload data to a cloud. Our data is and will remain private!

Model selection#

For our first tests, we focused on the Shelly 2.5:

  • Made in Europe
  • Price, depending on the ESP8266 chip, is 2 to 3 times lower
  • 110/240 VAC or 24/60 VDC operation
  • Supports loads of 2x2300 Watts or 2x10 Amps
  • Multi-purpose where competitors offer 1 product for 1 need
  • Compact size (smallest)
n.b To date, Shelly products do not operate on the more expensive Zigbee and Zwave protocols. Shelly works via the wifi protocol. The absence of these protocols has no impact on security. Whatever happens, we need to secure our access points. Filtering by mac address is the answer, a dedicated access point the target.

Objectives#

Present the installation of a Shelly 2.5 module, installed in a sock-type flush-mounted switch box. This module controls

  • 2 lighting lines via 2 relays
  • 1 roller shutter:
    • up
    • down
    • stop

Materials required#

  • 1 Shelly 2.5 module
  • 1 cable tester
  • 1 wire cutter
  • 1 wire stripper
  • 1 set of 1.5mm² rigid wires (blue, red, violet)
  • 1 flush-mounting box, like sock
  • Connector like Wago
  • The technical operations presented require a high level of technical and legislative knowledge of electricity.
  • The author declines all responsibility, and recommends the intervention of a professional, for any modifications to your electrical installation.
  • If you do not understand the operations presented here, do not perform them.

Wiring - Single channel operation (1 relay)

Schéma & Documentation officielle

All electrical work must be carried out on an unpowered circuit: circuit breaker off!

The Shelly module is connected in parallel with an electrical switch.

  • The module is electrically powered as soon as:
    • the phase wire is connected to terminal L
    • the neutral wire is connected to terminal N
  • Output O1 supplies power to the lighting line.
  • The SW1 input recovers the cut phase from the switch.

Wiring Shelly-2.5

In FRANCE:

  • Phase wire is red
  • Cut phase wire is purple
  • Neutral wire is blue
  • Ground is two-tone (yellow and green)

In France, potential difference between:

  • Earth and neutral is zero
  • Phase and neutral not equal to zero (220 / 240 vAC here)