US Office
4258 West 12th Street
Erie, PA 16505
United States (814) 835 0621

Support - WiFi Data Loggers

Why are some of my tabs on account settings inaccessible?

If you're having trouble accessing these tabs to change location or user settings, please try reducing the zoom level on your browser. This can be done by using Ctrl - or Ctrl & mouse wheel. On mobile devices these may be inaccessible due to screen size.

Where Has My Old Data Gone After the Daylight Saving Time Switch?

Open the EasyLog Cloud and go to the graph view of the sensor you wish to view the data for. Now select the “Sessions” button and select the session that has the data you wish to see. The reason for this new session is due to the switch to Daylight Saving Time. This way data integrity is maintained.

When I try to install the EasyLog WiFi Software, I get an error saying Microsoft .NET Framework 3.5 SP1 needs to be installed. What should I do?

This happens on new Windows 10 computers, which do not make previous versions of the .NET Framework available by default. You will need to enable the .NET Framework 3.5 through the Windows Control Panel, for how to do this see:

During Installation or Update I get a ‘Windows Defender SmartScreen’ warning, what does this mean?

This may occur if the software version is a recent new release and the Windows system is not yet aware of the Security certificate. It is safe to click 'Run Anyway'.

My sensor devices are not communicating with the EasyLog Cloud?

If your access point or WiFi router is working, your device may be out of range. You can check the range of the sensors by pressing the device button three times. This will show a number between 1 and 10 if you have a signal, with 1 being a low signal and 10 a strong signal. When the sensor device shows ‘- -‘, there is no signal.

How do I force a transmission from my WiFi sensor device?

When the sensor is displaying the main reading screen on the LCD, press the button on the front four times. The MAX, MIN and Signal Strength screens will be quickly displayed. The device will try to transmit its latest data immediately, regardless of the transmission rate setting.

The WiFi icon on my sensor is flashing, what does this mean?

This means that the sensor is not connected to the EasyLog Cloud. Check your network connections first and then make sure that the sensor is within range of the access point or WiFi router. To save battery power, the sensor may be in sleep mode for up to 30 minutes and will then look for a connection again. No data is lost while the sensor is temporarily not connected. Once connection is resumed all data will be synchronised with the EasyLog Cloud.

How can I reset my sensor?

The device can be reset by holding the button for 10 seconds. Release the button when RST appears on screen. The device will retain all settings but will lose any data that had not been transferred to the EasyLog Cloud. It will continue to be connected to the account it was set-up with and will simply start a new recording session.

If necessary, a full factory reset can also be performed by holding the button for 20 seconds until FArS appears on screen. Doing this will return the device to the factory state, deleting all settings and clearing any remaining data. The device will no longer be connected to any network or EasyLog Cloud account.



What does it mean when the MAX, MIN and battery symbol are all displayed on the LCD at the same time?

This is displayed if the device is charging, and the temperature of the battery is above 40°C. For safety, the device will stop charging until the temperature has returned to a safe level.

How do I turn the sensor off?

The sensor cannot physically be switched off; it will remain on permanently until the battery runs out.

How do I know if my WiFi AP/Router is 802.11b/g/n compatible?

All WiFi AP/Routers are 802.11 compatible and there are currently five standards in general use; a, b, g, n and ac. To find out what type of router you have, you may need to refer to your AP/Router user manual or contact your Internet Service Provider or IT Department.

I have connected the device to my PC using the USB cable, but the software does not see it. What should I do?

You can try any or all of these steps to help with this problem:

1) Remove the USB cable and re-insert.

2) Restart the software.

3) You may be missing drivers. If this is the case please reinstall the software.

4) Restart the device by holding the button down for 20 seconds.

Why will my device not connect to the wireless network?

You can try any or all of these steps to help with this problem:

1) Check that the password being entered is correct.

2) On your access point or router, 802.11b must be enabled if your EL-WiFi device is a Type One; the MAC address will start MAC:98:8B:AD:0X:XX:XX or MAC:98:8B:AD:1X:XX:XX for a Type One device. Otherwise 802.11b, g or n will need to be enabled on your access point or router.

3) Ensure MAC filtering is not switched on in the access point or router. If it is switched on, only known devices will be able to connect to your router.

4) Check that your network has an internet connection.

5) Check that the device is in range of the router.

6) Check to see if the router has the latest firmware.

7) If the access point or router has WEP Encryption ensure that the HEX key is being entered rather than the password. You can find the HEX key in the internal settings of your access point or router. Alternatively, search the web for resources to help convert your password to a HEX key.

8) Check that DHCP service is running. This allows the device to be allocated an IP Address. Normally, the DHCP service runs in either your router or on a network server. Make sure that the configured DHCP IP address range allows the addition of new devices if not, then extend the range.

9) If your wireless network uses WPA Enterprise, make sure that the correct authentication type is selected from the drop-down box. Only the types listed are supported.

10) If your access point or router has a wireless mode setting, this must be set to ‘Mixed’, not ‘Greenfield’.

11) Make sure that the SSID name does not contain spaces.

If the device battery runs out, will I lose all of my data?

The device will not take readings when there is no power but all readings it has taken prior to the loss of power will be synchronised. Once recharged, the device will reconnect to the EasyLog Cloud, start a new recording session, and continue recording.

If using battery power you must set suitable sample and transmission rates as these will affect your battery life.

If I have a power outage, will I lose any data?

As the device is powered by battery, the device will always continue recording at the sample rate you have set. If a power outage occurs, the device will continue to attempt to connect to your network until power returns and the access point or router becomes available again. The device then synchronises all remaining data with the EasyLog Cloud. No data is lost.

What battery life can I expect from my sensor devices?

There are a number of factors which can significantly affect the battery life of the device including; Sync Schedule, WiFi encryption method, WiFi encryption key rotation frequency (determined by the Access Point or router), signal strength between access point or router and device, presence volume and type of WiFi traffic from other devices, sample rate, and operating temperature. In our tests, we regularly achieve battery life in excess of six months with a transmission rate of one hour or more.

How do I charge the battery in my sensor device?

The sensor will arrive partly charged but ideally you should charge it for 24 hours before use for optimum performance. The battery can be recharged via a PC, a USB +5V wall adapter, or a portable USB battery pack using the USB lead provided.

Please note that due to the heat generated whilst charging, WiFi devices with an internal temperature sensor will indicate a temperature a few degrees above the ambient temperature. Once fully charged, this heat generation ceases and the sensor will eventually indicate the correct temperature. This anomaly does not apply to data loggers with external temperature probes.

How long will it take to fully recharge my sensor device?

From a very low battery state, it can take up to eight hours to fully charge your sensor. The battery status can be seen from the Devices page on the EasyLog Cloud. The battery can be recharged via a PC, a USB +5V wall adapter, or a portable USB battery pack using the USB lead provided.

Can I permanently power my sensor device?

Yes, you can permanently power the sensor using a USB wall adapter PSU USB-UK, PSU USB-EU and PSU USB-5VDC-US or external battery pack. (both available separately).

Please note that due to the heat generated whilst charging, WiFi devices with an internal temperature sensor will indicate a temperature a few degrees above the ambient temperature. Once fully charged, this heat generation ceases and the sensor will eventually indicate the correct temperature. This anomaly does not apply to data loggers with external temperature probes.

How do I update my devices?

The WiFi devices contain program code that runs internally, often referred to as firmware. You can update the firmware via the EasyLog WiFi Sensor Software (v1.30.41 onwards) by clicking on the green ‘Advanced Tools' icon and then clicking on the green 'Firmware Updater' icon. You’ll need to connect the device to the PC using the USB cable provided then follow the on-screen instructions to download and update the latest firmware versions.  To benefit from the latest improvements we recommend using the latest firmware releases for your devices. Depending on the previous firmware version, your device may be in a factory-reset condition following a firmware update, and will need to be re-connected to the Cloud if being used previously. Any existing data for this device on the EasyLog Cloud will be archived for safe-keeping.

How many sensors can I connect to my EasyLog Cloud account?

The number of devices you can connect will depend on which type of EasyLog Cloud account you have. This will be either Starter or Professional.

For more information visit your account vitals via the accounts tab on the navigation bar at

What does Setup Pending mean?

This means that you have changed a setting on a device, for example the transmission rate, an alarm level or any other parameter. The device will receive its new settings the next time it transmits to the EasyLog Cloud, the set-up will be pending until that time.

Is there a cost associated with using the EasyLog Cloud?

If you have Signed-Up with EasyLog directly our charges will depend on which account type you have chosen and how many devices you require connected to your account.

If this Cloud service has been provided to you by a 3rd party or your supplier, you should contact them directly about billing enquiries.

Is it possible to upgrade or downgrade my account?

If you have Signed-Up with EasyLog directly, you can upgrade your account at any point. Downgrade is also possible, depending on the number of devices you have connected to your account. You cannot downgrade to a STARTER account.

If this Cloud service has been provided to you by a 3rd party or your supplier, you should contact them directly about changing your account.

How can I cancel my EasyLog Cloud account?

If you have Signed-Up with EasyLog directly, you can cancel your account by clicking on the “Account” link and selecting CLOSE ACCOUNT at any time. Your sensor devices will no longer work on the EasyLog Cloud but can still be used in PC only applications.

If this Cloud service has been provided to you by a 3rd party or your supplier, you should contact them directly about cancelling your account.

Can I purchase an EasyLog Cloud account in my country’s currency?

If you have signed-up with EasyLog Cloud directly, you can pay in GBP or in USD. If you are not in a country using GBP, we would recommend using USD as your payment method.  If your Cloud service has been provided to you by a 3rd party or your supplier, you should contact them directly about paying for your account.

How can I access the EasyLog Cloud?

You can access your EasyLog Cloud account using any internet enabled device through a web browser. This could be your PC at home/office, your iPad/tablet or your mobile phone, etc. The EasyLog Cloud supports the latest Chrome, Internet Explorer, Firefox, Edge and Safari browsers. Data charges may apply if viewing data from your EasyLog Cloud account on your mobile phone. Alternatively you can access your account via the EasyLog Cloud App.

Where can I find the terms and conditions of the EasyLog Cloud?

You can find links to all our terms and conditions documents on the EasyLog Cloud Home page.

How secure is my data on the EasyLog Cloud?

Your data on our EasyLog Cloud account is very secure. The only way to access your account and data is to use the email address and password that you specified when signing up to your account. If you have a Premium account with multiple users, a user with Administrator privileges can control which data individuals can access.

We regularly back up all data and take all industry standard precautions. However, we always recommend that you also back up any data locally.

What is the difference between the sample rate and the transmission rate?

The sample rate sets how often the WiFi device records a reading. The transmission rate sets how often the WiFi device transmits this information to the EasyLog Cloud. Choosing the right sample and transmission rate for your specific needs is vital to ensure that you maximise battery life. Every application is different so we have made the system as flexible as possible.

Why have I lost all my data?

The only way device data is lost is if you delete a device. The EasyLog Cloud asks if you definitely want to delete the device so you will not be able to do this by mistake. If you have a Starter account, the EasyLog Cloud stores only the most recent 45 days of data. Data older than this is automatically deleted.

How do I archive or delete a device?

Select the device(s) and click on the menu button in the top right of the Devices Page, this menu contains the options for both archiving and deleting a device.

How often does the sensor device send data to the EasyLog Cloud?

When you first connect the sensor to your EasyLog Cloud account the default transmission period is pre-set to five minutes. You can change the transmission rate by clicking on the Device(s) you want to change and then clicking on the menu button in the top right of the devices page and selecting Device Settings. The Sync Schedule setting does not affect delivery of alarm conditions which are transmitted immediately.

Can I try the EasyLog Cloud service before committing to pay for an account?

Our Starter account is perfect for people wanting to trial the EasyLog Cloud with a single device for FREE. Some of the functionality is limited to Professional accounts but the Starter account will allow you to try the system. If you have Signed-Up with EasyLog directly, Click the “Upgrade” link On the Home screen or visit your account settings via the Account Tab to upgrade to Professional at any time.

If this Cloud service has been provided to you by a 3rd party or your supplier, you should contact them directly about changing your account.

Is the EasyLog Cloud guaranteed to be 'up' 24 hours a day, 365 days a year?

The EasyLog Cloud will have to be taken offline on rare occasions if the servers are upgraded or if any system maintenance is needed. This will be infrequent and notification to all Cloud users is given by email in advance of any offline time.

Why does the screen on my WiFi device show a different value to the reading on the EasyLog Cloud?

The LCD is updated every two seconds giving near-instantaneous readings at the device whereas the EasyLog Cloud receives readings recorded at the sample rate and transmitted to the EasyLog Cloud at the defined Sync Schedule.

I noticed that you have a wide range of sensors. Can I add all the different device types to my EasyLog Cloud account?

Yes, all the various WiFi sensors we produce are designed to work with the EasyLog Cloud account.  However, the exception to this is the EL-WiFi-Alert device, which can only be installed locally on a PC and not in the Cloud. 

How many devices can I add to my EasyLog Cloud account?

You could feasibly have an unlimited number of devices on your account, depending on your account type. Please contact EasyLog directly, or your supplier to find out more about high capacity Cloud accounts.

What if I forget my account password?

All passwords are held in an encrypted format on-line. If you forget a password, please use the 'forgotten password' link on the Sign In screen. This will ask for your email address and will send you a link to reset your password.

Why is a sensor alarm reset when I change an alarm setting?

Changing any alarm setting in Change Device Settings will cause the sensor to be refreshed with all alarm settings. This may cause an existing alarm condition to be reset.

Can I use sensor devices to monitor AC power?

Yes, you can receive email alerts when AC power fails or is restored. Simply connect your WiFi device to a mains-derived power source (e.g. a USB +5V power supply), and enable email alerts for AC power in Change Device Settings. Caution: Readings may be affected on some types of device while the internal battery is being charged. However, once charged, continued connection of the charger or external battery pack will have no effect.


How does the EasyLog Cloud work with time-zones?

In any Easylog Cloud account, which accommodates multiple Locations, you can specify a different time-zone for each location. When viewing data, event logs or device properties, times and dates are shown as local (i.e. at the device location).

What is a recording session?

In order to manage data received from your device efficiently, the EasyLog Cloud divides data up into what we call ‘sessions’. Your device will begin a session when it first begins logging. If you make any changes to the device such as a sample rate or alarm level change, the EasyLog Cloud closes and saves the current session and a new session is started. A complete list of all sessions is shown within the Session List Button on the Data page. All sessions have the ability to be merged together via this button so you will be able to see all data recorded by this device in a single data view.

Is there a limit to the maximum size of a session?

Sessions have been limited to a maximum of 300,000 readings to avoid problems associated with graphing very large data sets. This limit is equivalent to just over 1 month at the fastest sample rate (10 seconds). One year of logging can be achieved with sample rates of 2 minutes and above.

I have just gone into 'Adjust Device Settings' and there are some parameters highlighted red but the sensor does not show 'Setup Pending' on the devices screen. Why is this?

This is normally caused if you have exited the 'Adjust Device Settings' screen using the back button or closing the browser window. Go back into 'Adjust Device Settings' and either click Apply to keep the changes or Cancel to lose them.

What is an Audit Check?

In some applications it is necessary for a sensing device to be visited periodically and physically checked by the user. When enabled, the Audit Check function records these checks, which are displayed on the graph, and in tabular data. Change your Audit Check settings in the Change Device Settings page.

To find out how to record an Audit check please see instruction for your specific device.

How do I replace the battery in my WiFi logger?

The EL-WiFi loggers feature non-replaceable, rechargeable batteries. If you think the battery has gone flat, connect the logger to a PC using a Micro USB cable (CABLE USB A-MICRO B) for up to 24 hours.

Will the device work with a VPN (Virtual Private Network)?

This is technically possible, provided that the VPN can allow the device internet access via TCP port 14354.

Where can I find hints and tips on EL-WiFi 21CFR?

Download our EL-WiFi 21CFR Hints and Tips Guide to find out how set up and operate EL-WiFi-21CFR products.

Is there an App available for the EasyLog Cloud?

Yes. Although the EasyLog Cloud is web based and can be accessed using a browser on a phone, tablet, PC or MAC, to keep the system flexible there is also the Easylog Cloud App available from Apple Store and Google Play Store. 


Are the Apps free to download?

Yes both Apps are free of charge to download from the Apple Store and Google Play Store.

Can I use the App if I don’t have a cloud account?

No.  You can only use the Apps if you have a cloud account. To set up your account, visit the EasyLog Cloud website.

Can I change the loggers settings using the app?

Android users have all the functionality of the cloud as well as exclusive features just for the App.  In the first release of the App on the AppStore, users of iPhone and iPads will only be able to view sensors and alarm conditions.  Changing device settings will follow shortly.

Can I use these Apps if I have a 21CFR cloud account?

No.  Due to the requirement for strict data control within a 21CFR system, we are unable to offer mobile app compatibility to 21CFR cloud users.

What does the button on the Wireless Alert do?

A quick press of the button will show the status of your device (refer to the flashing indicator FAQ). Pressing and holding the button for 3 seconds will put the Wireless Alert in setup mode. Pressing and holding the button for 10 seconds will factory reset the Wireless Alert.

What does a flashing light on my Wireless Alert mean?

After a quick button press:

After holding the button for 3 seconds in order to enter setup mode:

After Holding the button for 10 seconds in order to factory reset a Wireless Alert:

Other LED states:


What should I do if I am not receiving any emails from my Wireless Alert?

  • Ensure that you clicked the confirm button in the confirmation email you received after setup
  • Check your junk mail folder (If Wireless Alert emails are appearing in here, check your email setting and ensure that is a trusted sender. You may need to check your email provider's guidance on how to do this)
  • Check your Wireless Alert's WiFi connectivity by trying to set the device up again

How can I alter my settings once the Wireless Alert is set up?

From the home screen on the Wireless Alert app, select the 'UPDATE A WIRELESS ALERT' option and follow the step-by-step instructions.

How do I factory reset my Wireless Alert?

Press and hold the button on your Wireless Alert for 10 seconds, until the LED flashes green/red/green for 3 seconds. The device will then return to its factory default settings.

Can I replace the probe on my Wireless Alert?

No, the temperature probe on the Wireless Alert is not replaceable.

How will I know when the batteries on my Wireless Alert need replacing?

You will receive a notification email when the battery level is low.

How do I replace the batteries in my Wireless Alert?

Carefully prise the front of the casing off and replace the 2 x 1.5V Alkaline LR03/UM4/AAA batteries, ensuring the correct orientation.

Does the Wireless Alert record data?

No, Wireless Alert is not a data logger, it is an alert system. However, it is capable of reporting summary data including minimum, maximum and average readings, as well as battery level, the number of alerts experienced, and the total time spent in alert mode. These summaries are reported via email notification and can be configured for daily, weekly or monthly frequency.

How do I factory reset my Wireless Alert PRO?

Hold down the button for 10 seconds after which the LED will flash RED - GREEN - RED, indicating the factory reset is complete.

I can't see any available Wi-Fi networks to connect my Wireless Alert PRO to

Make sure you are within a reasonable range of your WiFi router and there are no large obstructions or other signals which may cause interference. 

You may need to close the app and restart the setup process to refresh the list of available WiFi networks.

I am not receiving alerts from my Wireless Alert PRO device on my mobile

Ensure you have notifications enabled for the FilesThruTheAir app in your phone’s settings

My Wireless Alert PRO setup is failing - what can I do?

  1. Ensure you have the latest version of the FilesThruTheAir App Installed
  2. Ensure you have allowed location permissions for the app. You should be prompted to allow it after installing the app, or these can be manually changed in your phone’s settings.
  3. Confirm your Wireless Alert PRO device is in setup mode. Hold the button for 3 seconds and check to see the green light flashes. You can also go into phone settings and view available WiFi networks to confirm the device is visible. If the sensor is in setup mode you should see a WiFi network called – CT_WirelessAlertPro_XXXXXXX
  4. Make sure your mobile data is turned off during setup
  5. Make sure you are not connected to a VPN
  6. If you are still struggling to connect, contact us directly on +44(0)1794 884567 and speak to one of our technicians, or email

My Wireless Alert PRO sensor is not powering on

Wireless Alert Pro range is permanently powered and must be plugged into mains via the provided USB-C cable at all times. Ensure the cable is properly inserted into the device.

If the device still does not power on try using another USB-C cable.