# Smart switch Sonoff SPM-Main WiFi with remote control and energy monitoring

**URL:** https://aio.lv/en/product--sonoff-spm-main--8604345
**Data updated:** 2025-11-27 22:54 (EET)
**Category:** Home Automation
**Manufacturer:** Sonoff
**Manufacturer code:** SPM-Main
**EAN:** 6920075776973
**Warranty:** 2 Years
**Availability:** Available for order
**Price:** 18.49 €
**Prices and availability valid until:** 2026-07-12 23:59
**Price without VAT (21%):** 15.28 EUR
**Can be purchased by legal entities:** Yes (invoice)
**Buy:** https://aio.lv/en/product--sonoff-spm-main--8604345

## Delivery options

| Delivery method | Delivery time | Cost |
|---|---|---|
| Office pickup (2b. Kengaraga str., Riga, Latvia, LV-1063) | 09.07.2026 | free |
| Pickup points | 14.07.2026 | 1.99 EUR |
| Courier delivery to door | 14.07.2026 | 4.99 EUR |

## Summary description

Sonoff SPM-Main is a WiFi smart switch providing remote control and real-time energy monitoring. Designed to integrate into home automation setups, it lets you switch power on/off remotely and track energy consumption for connected circuits or appliances. Useful for saving energy, monitoring usage patterns, and adding remote control via smartphone or compatible platforms.

## Long description

Sonoff SPM-Main smart switch with energy monitoring and Ethernet/Wi‑Fi connectivity. The module provides real‑time power measurement for connected circuits, supports connection of up to 32 SPM‑4Relay expansion units (4 channels each) for a maximum of 128 independent channels, and includes overload protection and an SD card slot for local data logging.
Advantages
The SPM‑Main supports both Ethernet and 2.4 GHz Wi‑Fi (802.11 b/g/n), and communicates with SPM‑4Relay units via RS‑485 for stable long‑distance transmission. It offers precise power, current and voltage measurement visible in the eWeLink app, overload protection with automatic shutdown and load delay, and local logging to an SD card (8–32 GB, SDHC). The device is DIN‑rail mountable and designed for straightforward installation.
Suitable for
Monitoring tenant electricity consumption in multi‑unit buildings
Energy management in offices, retail spaces and shopping centres
Power control and protection in server rooms and mining rigs
Integration into home or commercial automation systems for remote switching and metering
Key specifications
Brand: Sonoff
Model: SPM‑Main
Input: 100–240 V ~50/60 Hz, 50 mA max.
Wi‑Fi: 802.11 b/g/n, 2.4 GHz
Expansion support: up to 32 SPM‑4Relay units (4 channels each), up to 128 channels total
Max load per SPM‑4Relay channel: 20 A (per relay specification)
Material: PC V0
Dimensions: 142.5 x 90 x 66.5 mm
SD card: compatible with 8–32 GB SDHC (not included)
How to use
Install the SPM‑Main on a DIN rail and connect mains input (100–240 V). Link SPM‑4Relay expansion units to the SPM‑Main via RS‑485 cabling for additional channels. Configure network access using Ethernet or connect to a 2.4 GHz Wi‑Fi network. Pair the module with the eWeLink app to view real‑time and historical energy data, set overload thresholds, and control connected circuits remotely.
Usage recommendations
Use appropriate wiring and protective devices when installing the SPM‑Main and expansion relays. Ensure the total connected load per channel does not exceed the relay’s rated current. Regularly back up SD card logs if long‑term records are required and use an SDHC card within the supported 8–32 GB range. For reliable Wi‑Fi operation use a stable 2.4 GHz network; for longer RS‑485 runs follow recommended wiring practices.

## FAQ

### How much does the Smart switch Sonoff SPM-Main WiFi cost, and is it available for purchase?

The price is 18.49 € (valid at the time of publication and already includes all taxes). The item is available for order — 91 pcs. are in stock, and you can place your purchase right now with delivery across Latvia and Europe or choose pickup at the Riga collection point. We offer favorable purchase terms, including the option to split the payment into convenient monthly installments. Availability and price are updated in real time, so we recommend placing your order in advance.

### If I order this product today, when will I receive my order?

If you place your order today, delivery will be as fast and convenient as possible. You will be able to pick up your order on 09.07.2026 at the Riga pickup point or choose delivery across Latvia and Europe. We carefully inspect every purchase and pack it securely for safe transportation.

### What payment options are available?

AiO.lv offers several payment methods: Bank transfer, Bank cards on-line, Apple Pay, Google Pay. All transactions are 100% secure and encrypted.

### Can this product be purchased for a company (with VAT)?

Yes. AiO.lv works with legal entities in Latvia and across Europe. The product price already includes VAT. For certain product categories, as well as for companies from other EU countries with a valid VAT number, a 0% VAT rate may apply. We issue the invoice immediately after the order is placed, support electronic BIS invoices, and automatically generate all necessary accounting documents. You can complete the purchase for a company online — simply select the company profile and choose bank transfer as the payment method during checkout.

### What is the warranty period?

All Sonoff products come with an official 2 Years warranty. It covers all manufacturing defects and malfunctions that may occur during use. The warranty is valid at all authorized Sonoff service centers and through AiO.lv

### Can the product be returned after purchase?

Yes, you can return the product within 14 days of purchase if you bought it as a consumer (not a legal entity). Returns are possible without giving any reason — the main condition is that the product retains its original appearance and full set of accessories. We will make the process as simple and convenient as possible: just contact our customer support team, and we will help you arrange the return.

### Where should I contact for warranty service?

For warranty-related questions you can contact the AiO.lv (SIA VSPRO) customer support team. More information about warranty service: https://aio.lv/en/warranty

## Image

https://aio.lv/img/cache/product/8604345/51656431_large.webp