E4 Led Guide (FW 3.0.1.6612 and higher)

Please be aware that this LED guide is only relevant to FW 3.0.1.66.12 and higher. You may reference this guide for FW 2.1.0.4911.   The E4 comes equipped with a single button to support interactions. You can trigger different E4 actions depending...

E4 data - BVP potential issues

The reasons behind a bad BVP signal as the one shown below could be related to a broken optical sensor (in which case a replacement is needed) or to physical obstruction of the light that cannot illuminate the skin and measure the changes in light...

E4 data - BVP/PPG sensor test

To verify if your PPG sensor is working properly, please proceed with the following steps:Before you start, please reassure that your E4 is charged and the firmware is up to date and you have the latest version of E4 Manager. Remove the E4 from t...

E4 data - EDA electrodes test

To verify if your EDA sensor is working properly when requested from our Customer Happiness team, you'll be asked to perform some tests.Before going through all the steps, please make sure that your E4 is charged and the firmware is up to date and...

E4 wristband doesn’t power up, what can I do?

If your E4 wristband doesn’t power up when you press the button or connect it to the charger, your device might have been affected by a glitch that temporarily prevents the wristband from powering on. If you’ve encountered this issue, please try t...

E4 Firmware upgrade aborted - E4 displays steady green LED

If you've encountered an issue while upgrading E4 firmware to version 1.1.1, in particular, if the upgrade process was interrupted due to unexpected errors/disconnections, as a consequence you might be experiencing one of the following problems wi...

Missing recorded E4 sessions

Occasionally E4 may not register a new recorded session if it is powered off.   If you connect the E4 to the E4 manager to transfer data after recording a session, and no sessions are found, try disconnecting the E4, powering it on manually, and w...

E4 data - EDA potential issues

Signal noise can be caused by many different factors, but there are certain recognizable conditions which are most likely due to a loose electrode or a possible issue with the sensor or wiring.Now we’ll look at some common issues that result in po...

When I plug the device into a USB port, no light turns on

The device should power on when it is plugged into a powered USB port. If the E4 is seated in its charging dock and connected to a powered USB port and you do not see any lights come on try the following steps:   (1) First, try powering on the E4 ...

No light is turning on when I press the button

The battery is probably empty. Please connect the E4 to a powered USB port and allow it to charge for several minutes.   If you haven't found the answer to your question, click the button below and complete the typeform. We will receive all the in...

What do I do when the LED light blinks red and green and it does not start recording?

Recovering from Memory ErrorsObserving a blinking red light (for fw 2.1.0.4911, alternating red and green) after powering on your E4 is an indication that the device is in a memory error state due to (1) full onboard memory or (2) an alternative m...

E4 Led Guide (FW 2.1.0.4911)

  Please bear in mind this LED Guide only applies to the firmware version 2.1.0.4911.  The E4 comes equipped with a single button to support interactions. You can trigger different E4 actions depending on the duration of the button press.button in...