Smart home system owners often face a situation where they need to reconnect a device to a new wireless network or restore control after changing a router. At this point, the most critical question becomes: what is the password for the device? ITEAD Sonoff WiFiThe answer depends on the specific controller model and its operating mode, as there is no single universal code for all devices.
By default, during initial setup, many devices don't require a password to connect to the controller's access point. However, if you use AP (Access Point) mode for configuration, the system may request authentication. It's important to distinguish between the password for the WiFi network the module connects to and the password for logging into the web interface or management console.
In this article, we'll cover all the possible scenarios you might encounter. We'll cover factory defaults, hard reset methods, and the specifics of working with the Tasmota firmware if you decide to modify your device. Understanding these nuances will save you time and frustration when setting up your smart home.
Standard credentials and operating modes
When you first buy the device Sonoff Basic, Sonoff Mini or more advanced versions with screens, they are in factory condition. In this mode, the module creates its own WiFi network, the name of which usually begins with the prefix ITEAD or sonoffMost modern models do not require a password to connect to this network, or it is indicated on a sticker under the case.
However, if accessing the web interface after flashing the firmware or in specific debug modes, standard credentials may be required. Users often confuse the WiFi router password with the device password itself. With eWeLink firmware, there's usually no separate password for accessing the local interface; management is performed via the cloud.
The situation changes if the device has been in use or hasn't been fully reset. In these cases, a user password may have been set. If you don't remember it, the only reliable solution is a full reset, which we'll discuss below. Don't try to guess the combination, as this may temporarily lock your device.
It is worth noting that some models, such as Sonoff TH16 or Sonoff POW, may have different behavioral logic depending on the hardware platform version. Always refer to the markings on the printed circuit board if standard methods don't work.
Hard Reset Procedure
The most reliable way to find out, or rather, eliminate the need to know, the old password is to perform a full reset of the device to factory settings. This procedure is guaranteed to erase all saved data, including WiFi passwords and eWeLink account linking. For most Sonoff models, this is done manually.
You'll need a thin object, such as a straightened paperclip or toothpick. Locate the button labeled Reset or simply indicated by a dot. In some models, such as Sonoff Basic, this may be the only control button that performs a dual function.
⚠️ Attention: Make sure to hold the reset button while the device is on. Simply pressing and releasing it will only trigger the relay, but the settings will not be reset. You must hold the button for 7-10 seconds until the indicator light starts flashing.
The reset process is as follows:
- 🔌 Connect Sonoff to a power source (220V or USB, depending on the model).
- 🕒 Find the reset button and press it for 7-10 seconds.
- 💡 Watch the LED: it should start flashing quickly, indicating that it has entered pairing mode.
- 📱 Release the button and wait for the module to reboot.
After completing these steps, the device will again create a network with a name like ITEAD-XXXXThere is usually no password to connect to this network. If the system requires a code, try the standard combination. 20170618, which was used in earlier firmware versions, but in 99% of cases the field can be left blank.
☑️ Checklist for a successful Sonoff reset
Setup via eWeLink app
The official method for managing devices ITEAD involves the use of a mobile application eWeLinkAfter resetting the settings, you don't need to manually search for the WiFi module password. The app will automatically find the device on the local network and offer to transfer your router settings to it.
The setup process involves several steps. First, you register an account, then add a new device. The app will request permission to access geolocation and local network data—these are mandatory requirements for Android and iOS for the discovery protocol to work properly.
Once you select the device type (usually detected automatically), you'll be asked to enter your home WiFi network password. This is the password your device will use to access the internet. Make sure you enter it correctly, maintaining proper case.
For successful pairing it is important that:
- 📶 Your phone is connected to a 2.4 GHz network (Sonoff does not support 5 GHz).
- 🔐 The WiFi password doesn't contain special characters that might be processed incorrectly (rare, but it does happen).
- 📡 Bluetooth and Geolocation are enabled on your smartphone.
- 🏠 The device is within the router's strong signal reception area.
If automatic setup fails, the app will offer "Quick Pairing" or "AP Mode." In AP Mode, you'll need to manually connect to the device's network and then return to the app to complete the configuration.
Working with alternative firmware (Tasmota, ESPHome)
For advanced users who prefer local control without the cloud, a popular practice is to reflash Sonoff controllers to Tasmota or ESPHomeIn this case, the password issue becomes more technical and important for security.
When you first install Tasmota, the device creates an open WiFi network. After connecting to it and navigating to the address 192.168.4.1, you'll be taken to the configuration tool. Here, you'll be prompted to configure the connection to the router and, importantly, set an administrator password.
By default, Tasmota often uses a password password or 20170618 for the configuration network, but it is highly recommended to change it immediately. Ignoring this step leaves your smart plug or switch vulnerable to anyone within WiFi range.
Default Tasmota Credentials:SSID: tasmota-XXXX
Password: (none or configured via serial)
If you've reflashed the device and forgotten the password you set, you'll need to use the serial port (UART) to reset it. This requires a USB-to-TTL converter (such as one based on the CH340 or CP2102).
Scheme of actions when resetting via UART:
- 🔧 Disassemble the Sonoff case (observe safety precautions!).
- 🔌 Connect the TX, RX, GND and 3.3V (or 5V) pins to the converter.
- 💻 Run the terminal (Putty, Arduino IDE) at 115200 baud.
- 🗑️ Enter the command
reset 2or hold GPIO0 at startup to enter firmware mode.
Risks of reflashing
Reflashing the Sonoff firmware will void the manufacturer's warranty. Furthermore, incorrectly flashing the firmware can brick the device, which can only be repaired with an ESP8266/ESP32 programmer.
Table of popular models and their features
Different device lines have their own design features that affect the reset and setup process. Below is a summary of the most common models available.
| Device model | Reset button type | Retention time | Peculiarities |
|---|---|---|---|
| Sonoff Basic / Basic R3 | One button (Toggle) | 7-10 sec | Reset and power on with one button |
| Sonoff Mini | Separate button | 5-7 sec | Compact, hides in a wall box |
| Sonoff TH10 / TH16 | Separate button | 7 sec | Temperature sensor support |
| Sonoff POW R2 | Separate button | 7 sec | There is energy consumption monitoring |
| Sonoff 4CH Pro | Button combination | Button 1 + Reset | Difficult reset, requires accuracy |
Please note that in the model Sonoff 4CH Pro The reset procedure is different. You must simultaneously press and hold the "1" button and the reset button (or follow the specific procedure described in the manual) to avoid resetting all channels at once.
For models with touch screens such as Sonoff T1 or T2A reset is often performed by long-pressing the touchpad or using a combination of touches. Carefully read the instructions for your specific revision, as the sensor logic may vary.
Diagnosing connection problems
Even with the correct password, users may still encounter Sonoff not connecting to the network. Often, the problem lies not with the device, but with the router settings. Modern routers can block older encryption protocols or have overly strict security settings.
One common cause is the "AP Isolation" feature on the router. If it's enabled, devices on the WiFi network can't see each other, and the eWeLink app can't transfer settings to Sonoff. Separating the 2.4 GHz and 5 GHz bands under a single SSID can also cause problems.
⚠️ Attention: Sonoff devices based on ESP8266/ESP32 chips operate ONLY in the 2.4 GHz band. If your router broadcasts a 5 GHz network with the same name, the module may attempt to connect to it and fail.
To troubleshoot, try creating a guest WiFi network with a simple password (letters and numbers only) and a name without special characters. Connect your phone to this network and try setting up Sonoff. If it works, the problem lies with your main router's settings.
It's also worth checking if your router has MAC address filtering enabled. If "Whitelist" is enabled, the new device simply won't receive an IP address, no matter how many times you enter the correct password.
Smart home security measures
Using default passwords or not setting them at all during setup is a temporary measure. Once the device is connected to the network, it needs to be secured. Factory passwords, such as admin or 20170618, are known to all attackers.
If you're using alternative firmware, be sure to change the default password. The original eWeLink firmware ensures security by linking your account, so it's important to use a strong password for your account and enable two-factor authentication (2FA).
Safety recommendations:
- 🔒 Use complex passwords for your WiFi network (WPA2/WPA3).
- 🔄 Update your device firmware regularly through the app.
- 🚫 Disable remote access (if you don't use it), leaving only local control.
- 📡 Separate your smart home devices into a separate guest network (VLAN), isolating them from personal computers and smartphones.
Remember that a hacked smart plug can become an entry point into your home network. Don't neglect basic digital hygiene.
Why does Sonoff disconnect from WiFi?
A common cause is a weak signal. ESP modules have a small antenna. If the outlet is installed deep in a metal wall box, the signal may be lost. Solution: use a WiFi repeater or move the router closer.
FAQ: Frequently Asked Questions
What is the default password for Sonoff Basic?
Most modern Sonoff Basic models (ITEAD-XXXX) don't require a password when connecting to the network. If the device asks for a password for the web interface after a reset, try leaving the field blank or using the code 20170618.
What to do if the reset button does not work?
Make sure you hold the button long enough (up to 10 seconds) and that the device is powered on. If the mechanical button is broken, for open-case models, you can short the GPIO0 and GND pins when powering on.
Is it possible to control Sonoff without internet?
The official eWeLink app requires internet access for initial setup and remote control. For offline (local) operation, you'll need to upgrade your device to Tasmota or ESPHome and use Home Assistant or similar systems.
Why can't Sonoff see the 5GHz network?
The WiFi modules used in Sonoff (ESP8266/ESP32) do not physically support the 5 GHz band. You must configure your router to broadcast a 2.4 GHz network and connect the device to that band.
How to find Sonoff's IP address on the network?
After a successful connection, the IP address can be found in your router's interface's DHCP Client List. Search for the device by the name "Sonoff" or by the MAC address listed on the sticker. You can also use network scanners, such as the Fing app.