- Networks
- Smart plugs and switches
Two short and one long flashes
Sonoff plug Two short and one long flashes: pairing mode
Risk level
Low
Usually safe to check without specialist tools.
Urgency
Low
Quick answer
Two short and one long flashes on the blue Wi-Fi LED of a SONOFF smart plug or switch indicates that the device is in pairing mode (Quick Pairing Mode or Bluetooth Pairing). Complete setup in the eWeLink app using a 2.4 GHz Wi-Fi network, or single-press the button to exit.
Safety first
Stop and check this first
- Please install and maintain wired SONOFF devices (BASICR2, BASICR4, MINIR2, MINIR4) only through a professional electrician with power turned off: never contact terminal connectors while powered on, and never connect MINIR4 S1/S2 terminals to neutral or ground wires.
- Never bypass overload protection or exceed maximum load ratings (16 A / 4000 W max on S60TPF; 10 A / 2400 W max resistive load with an upstream 10 A MCB/RCBO on BASICR4 and MINIR4).
Safe checks you can perform
- Single-press to exit accidental pairing mode or verify the 3/10-minute window
- Turn off the 5 GHz Wi-Fi band and pair in eWeLink with Bluetooth enabled
- Use Compatible Pairing Mode (AP) via the ITEAD-******* hotspot
Leave these tasks to a qualified professional
- Do not attempt this professional task: Install wired SONOFF switches with power off and a 10 A MCB/RCBO breaker
- Do not attempt this professional task: Configure 2.4 GHz Wi-Fi isolation and complete eWeLink cloud onboarding
What a technician must be able to justify
Technician visit
These are the steps they must carry out and show you. Tick them as they work: if steps are skipped, do not accept a part swap.
These are not instructions for opening or handling the equipment yourself. They are the checks that should support a technical conclusion.
Install wired SONOFF switches with power off and a 10 A MCB/RCBO breaker
What they doFor hardwired SONOFF switches (BASICR2, BASICR4, MINIR2, MINIR4), a professional electrician disconnects mains power, verifies an upstream 10 A MCB or RCBO is installed, connects the terminals ensuring MINIR4 S1 and S2 are never wired to neutral or ground, and secures the protective cover before powering on.
They must show youthe upstream 10 A MCB/RCBO breaker, secured protective cover, and verified terminal wiring diagram compliance.
In writingprofessional installation sign-off (100-240 V~, 10 A / 2400 W max resistive rating, S1/S2 isolated from neutral and ground).
Configure 2.4 GHz Wi-Fi isolation and complete eWeLink cloud onboarding
What they doThe technician verifies dedicated 2.4 GHz IEEE 802.11 b/g/n SSID broadcast, pairs the SONOFF device via QR code, Bluetooth, or AP hotspot (ITEAD-*******), and confirms the blue LED stays solid on.
They must show youthe solid blue Wi-Fi LED (Keeps on: Online) and working remote control in the eWeLink app.
In writingpaired 2.4 GHz SSID, pairing mode used, and verified online status in eWeLink.
Before accepting a part or repair
Nothing has been shown yet. Do not accept a part swap based on the code alone.
Follow these steps
Note: Follow the documented order. An error code identifies the affected system, but it does not prove by itself which part has failed.
Single-press to exit accidental pairing mode or verify the 3/10-minute window
- Who:
- you, at the safely plugged-in SONOFF smart plug.
- How:
- if pairing mode was triggered accidentally, short press (single press) the pairing button once to quit pairing mode; if you are pairing the unit, confirm the two short and one long blink cycle has not timed out (3 minutes on S26/BASICR2/MINIR2 or 10 minutes on MINIR4).
- Result that matters:
- either exit pairing mode immediately or ensure the device is actively waiting for the eWeLink app.
- If you only wanted normal manual operation:
- a single button press exits the pairing blink cycle.
- If the 3-minute or 10-minute pairing timer expired before setup finished:
- hold the button for 5 seconds to enter pairing mode again.
- Evidence to keep:
- blue Wi-Fi LED behavior after a single press or a 5-second hold.
Evidence: Blink! Blink! SONOFF Product is Talking to You · A Thorough Pairing Guide To SONOFF Smart Devices And eWeLink APP · MINIR4 User Manual
Turn off the 5 GHz Wi-Fi band and pair in eWeLink with Bluetooth enabled
- Who:
- you, using your smartphone and the official eWeLink app.
- How:
- temporarily turn off the 5 GHz band on dual-band routers so your phone uses 2.4 GHz Wi-Fi only, turn on phone Bluetooth (for S60TPF, BASICR4, MINIR4, and S26R2), scan the QR code or tap Add Device in eWeLink, and enter the valid 2.4 GHz Wi-Fi password.
- Result that matters:
- complete device registration so the blue Wi-Fi LED stays solid on (Keeps on: Device is online).
- If the device is added completely and the blue LED stays solid:
- you can re-enable your router's 5 GHz band afterward.
- If Quick Pairing Mode fails on models like S26, BASICR2, or MINIR2:
- switch to Compatible Pairing Mode (AP) next.
- Evidence to keep:
- Device added completely confirmation in eWeLink and solid blue Wi-Fi LED.
Evidence: Blink! Blink! SONOFF Product is Talking to You · S60TPF User Manual · MINIR4 User Manual
Use Compatible Pairing Mode (AP) via the ITEAD-******* hotspot
- Who:
- you, in the eWeLink app when standard Quick Pairing Mode cannot find the device.
- How:
- while the Wi-Fi LED is flashing two short and one long in Quick Pairing Mode, long press the pairing button for 5 seconds again until the LED flashes quickly, then connect through the ITEAD-******* hotspot in the eWeLink app.
- Result that matters:
- bridge your smartphone and Wi-Fi router directly through the device hotspot to complete pairing.
- If pairing succeeds via Compatible Pairing Mode (AP):
- the blue LED turns solid on.
- If the unit is a wired switch (BASICR2, BASICR4, MINIR2, MINIR4) that has not been wired yet:
- stop and have a professional electrician install it.
- Evidence to keep:
- selected pairing method (Quick, Bluetooth, or Compatible AP) and final LED status.
Evidence: Blink! Blink! SONOFF Product is Talking to You · A Thorough Pairing Guide To SONOFF Smart Devices And eWeLink APP
Still not solved
If the error persists, stop here. See what the technician must do and show you.
Where this code applies
A code is meaningful only inside the right product and version context.
Primary scope
- System
- Networks
- Brand
- Sonoff
- Product type
- Smart plugs and switches
Known code variants
- Dos breves y uno largo parpadea
- Dos destellos breves y uno largo
- Flashes two short and one long
- Quick pairing mode (Touch)
- Quick Pairing Mode SONOFF
- SONOFF pairing mode LED
What it means
In official SONOFF user manuals and the eWeLink pairing guide (covering S26, S60TPF, BASICR2, BASICR4, MINIR2, and MINIR4), a blue Wi-Fi LED cycle of Two short and one long flashes means the device is in Quick pairing mode (Touch) or Bluetooth pairing mode. It enters this mode automatically during first use after powering on or when you press and hold the pairing button for 5 seconds, and it exits automatically if not paired within 3 minutes on S26, BASICR2, and MINIR2 (or 10 minutes on MINIR4). This flash pattern is a normal setup state and alone never proves that any component is faulty.
Warnings and stop conditions
- Highsource verified
Please install and maintain wired SONOFF devices (BASICR2, BASICR4, MINIR2, MINIR4) only through a professional electrician with power turned off: never contact terminal connectors while powered on, and never connect MINIR4 S1/S2 terminals to neutral or ground wires.
Evidence: BASICR4 User Manual · MINIR4 User Manual
- Mediumsource verified
Never bypass overload protection or exceed maximum load ratings (16 A / 4000 W max on S60TPF; 10 A / 2400 W max resistive load with an upstream 10 A MCB/RCBO on BASICR4 and MINIR4).
Evidence: S60TPF User Manual · BASICR4 User Manual · MINIR4 User Manual
Symptoms and causes
Probable causes · in order
- First power-up out of the box or 5-second button pressCommon
SONOFF smart plugs and switches enter pairing mode automatically on first power-up or whenever the pairing button is held down for 5 seconds.
Evidence: A Thorough Pairing Guide To SONOFF Smart Devices And eWeLink APP · S60TPF User Manual
- Pairing failed because of dual-band 5 GHz Wi-Fi or wrong passwordPossible
SONOFF Wi-Fi devices only work with 2.4 GHz (IEEE 802.11 b/g/n) networks; if a dual-band router keeps 5 GHz active during setup or the password is wrong, pairing fails.
Evidence: Blink! Blink! SONOFF Product is Talking to You · S60TPF User Manual
- Router requires Compatible Pairing Mode (AP) via hotspot ITEAD-*******Less common
Some Wi-Fi routers block quick broadcast discovery and require holding the button for another 5 seconds to pair through the device hotspot ITEAD-*******.
Evidence: Blink! Blink! SONOFF Product is Talking to You · A Thorough Pairing Guide To SONOFF Smart Devices And eWeLink APP
Virtual technician
Does Two short and one long flashes still appear after these checks?
Answer a few questions to narrow down the likely cause and the safest next action. Guidance only - it never replaces a professional.
Sources and technical references
- 1
Blink! Blink! SONOFF Product is Talking to You
SONOFF · 2026 · official_doc
- 2
A Thorough Pairing Guide To SONOFF Smart Devices And eWeLink APP
SONOFF · 2026 · official_doc
- 3
SONOFF · 2026 · official_doc
- 4
SONOFF · 2026 · official_doc
- 5
SONOFF · 2026 · official_doc
- 6
SONOFF · 2026 · official_doc
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