How to Fix Sonoff MINIR4 Losing Pairing After Firmware Update
- Firmware update reset the pairing/WiFi credentials
- Update left it in a partial state
- Needs re-pairing after the update
Problem Description
Your SONOFF MINIR4 was working fine, but after installing a firmware update it lost its WiFi configuration and entered pairing mode (LED blinking rapidly). The firmware updated successfully, but the WiFi credentials stored in flash memory were cleared during the process. You need to re-pair the device in eWeLink and reconfigure settings like Power-On State, external switch type, and third-party integrations.
Why This Happens in Real Homes
A SONOFF MINIR4 losing its pairing after a firmware update means the update cleared or disrupted its stored WiFi credentials, so it can no longer connect and needs to be re-added. It's a known kind of post-update hiccup rather than a hardware failure.
Re-pair the MINIR4 in eWeLink: put it into pairing mode (hold the button until it blinks the fast pairing pattern), and re-add it on your 2.4GHz network with the correct password, staying nearby with strong signal. If it won't enter pairing or re-add cleanly, do a factory reset and onboard fresh. Install the latest firmware, since a follow-up build often fixes the regression, and contact SONOFF support if it still won't re-pair.
Symptoms
- MINIR4 lost pairing after a firmware update
- Unpaired since the update
- Offline after updating
- Won't reconnect post-update
- Needs re-pairing after firmware
- Worked before the update
- Dropped from eWeLink after update
- Pairing broke on update
Recognize these? Here's what usually causes it.
Common Causes
- Firmware update reset the pairing/WiFi credentials
- Update left it in a partial state
- Needs re-pairing after the update
- WiFi credentials cleared
- Firmware bug in that version
- Device in pairing mode after update
- Follow-up firmware needed
- Connection lost during flashing
Most fixes happen in the first 3 steps.
Do not run chained firmware updates without confirming stable pairing state.
Tools & Requirements
Step-by-Step Solution
Check if the MINIR4 is in pairing mode
After a firmware update, the SONOFF MINIR4 may reboot into pairing mode instead of reconnecting to WiFi. The LED blinks rapidly (twice per second). This can happen if the update process resets the WiFi credentials stored in flash memory — particularly on updates that change the networking stack. If the LED is blinking rapidly: the device needs to be re-paired in eWeLink. It has not lost the firmware update — the new firmware is installed, but the WiFi configuration was cleared.
Re-pair the MINIR4 in eWeLink
Open eWeLink > tap + > Quick Pairing. The MINIR4 broadcasts a temporary WiFi network (ITEAD-XXXXXXXXXX). The app detects it and walks you through selecting your home WiFi network and entering the password. The MINIR4 connects to your WiFi and registers with your eWeLink account. After pairing, check that the firmware version matches what you just installed: device > ··· > Device Info > Firmware Version. The re-pairing process does not downgrade firmware — it only restores the WiFi configuration.
Reconfigure the MINIR4 settings after re-pairing
Re-pairing creates a new device entry in eWeLink. Your previous settings are lost: Power-On State (defaults to ON), Inching/Pulse mode settings, and any edge switch configuration. Go to device settings and reconfigure: Power-On State to 'Keep Last State,' switch mode to 'Edge Switch' if you have a momentary switch wired to S1/S2, and Inching mode if you used it. Also check the 'External Switch Type' setting — options are Edge (toggle switch), Momentary (push button), or Detached (switch does not control relay).
Reconnect third-party integrations
Because re-pairing creates a new device ID in eWeLink's cloud, third-party integrations break. In Alexa: say 'Alexa, discover my devices' — the new MINIR4 appears as a new device. Delete the old (offline) device from Alexa. In Google Home: the device should auto-update when eWeLink syncs, but you may need to unlink and relink the eWeLink service. In Home Assistant: the eWeLink integration detects the new device ID — you need to update any automations referencing the old entity_id.
Prevent pairing loss on future updates
Before updating MINIR4 firmware: note down all device settings (Power-On State, switch type, inching settings). After the update, if the device reconnects normally without entering pairing mode, your settings are preserved. If it enters pairing mode: you know the settings to restore quickly. Not all firmware updates cause pairing loss — it primarily happens with major version jumps (e.g., v1.x to v2.x). Minor updates (v1.3 to v1.4) typically preserve WiFi credentials. Keep the device powered continuously during the update to minimize the chance of corruption.
Quick Solutions
Still having issues? This is usually the deeper cause below.
If pairing fails after multiple attempts, the device may still be registered to a previous account — factory-reset it before trying to add it to a new one.
Post-update validation should include reboot persistence checks.
Firmware updates that wipe settings are more common than brands admit — many devices silently reset to factory defaults on an OTA push with no warning.
- Firmware update reset the pairing/WiFi credentials
- Update left it in a partial state
- Needs re-pairing after the update
- WiFi credentials cleared
- Firmware bug in that version
Before you go — try one of these (they fix most cases).
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Official Manufacturer Manual
SONOFF provides official product documentation through their online manual rather than downloadable PDF. Access setup guides, troubleshooting steps, and product specifications for your Sonoff MINIR4 Pairing Loss.
Source: sonoff.tech
Need More Help? SONOFF Support
Note: The contact information below connects you directly to SONOFF's official customer support team, not Trunetto. They can help with warranty claims, device replacements, and advanced technical issues.
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