The OT-2R has a series of five (5) lights, known as LEDs, located on the side of its external electronics enclosure. This enclosure is located on the upper left side on the back of the robot if you are looking at your robot from the front (with the swinging door facing you). Please see the image below for reference:

These lights can be used to check the status of the system and help diagnose any “catastrophic” connectivity issues.

  • Note: LEDs = light-emitting diodes = robot status lights/indicators

What do the status lights indicate on my OT-2R?

Basic overview

1. Power - Light should stay on and remain solid if the OT-2R is turned on.

2. Ethernet - Light should be solid when the robot is connectable over Ethernet.

3. Wi-Fi - Light should be solid when Wi-Fi connection has been established with the OT-2R.

4. Heartbeat - Light will flash intermittently if the robot’s operating system has successfully booted.

5. Extra - Light should remain off for now (reserved for future use).

Detailed overview

  1. Power - Light should stay on and remain solid if the OT-2R is turned on.

    1. Light on: This light should always be on and solid if the robot is turned on.

      1. Note: This light is hardwired to the 5V power supply of the Raspberry Pi.

    2. Light off: If the OT-2R is on and this light is not illuminated, either the power cable is loose/unplugged, or a serious electrical issue has occurred and hardware likely needs to be replaced.

  2. Ethernet - Light should be solid when the robot is connectable over Ethernet.

    1. Light on: This light will be illuminated if the Raspberry Pi has successfully assigned an IP address to its Ethernet (wired) interface. This indicates:

      1. The Raspberry Pi recognizes that the cable is plugged in and that the other end is connected to something that’s turned on.

      2. The Raspberry Pi has assigned an IP address to its Ethernet interface through the usual means (either self-assigned a link-local address, self-assigned a static IP address, or received a DHCP address from the network).

    2. Light off: The OT-2R is not currently able to establish a connection over Ethernet.

      1. This is normal for a short period (~1 min) after booting up or after a cable has just been plugged in.

  3. Wi-Fi - Light should be solid when the OT-2R has connected to a Wi-Fi network.

    1. Light on: This light will be on if the Raspberry Pi’s Wi-Fi interface is connected to a network and has been assigned an IP address.

    2. Light off: If this light is off, it indicates that the OT-2R is not currently on a Wi-Fi network, which means the Opentrons App is not currently able to establish a connection over Wi-Fi.

  4. Heartbeat - Light will flash once every few seconds if the robot’s operating system has successfully booted.

    1. Light flashing (alternating between on and off): This light will flash intermittently which indicates the operating system of the OT-2R is running normally.

      1. Note: Individual components of the robot may still fail and this light will continue to blink normally.

    2. Light solid off or solid on: If this light is not flashing, the OT-2R’s operating system has suffered a failure and the system is likely not connectable.

  5. Extra - This light should remain off for now (reserved for future use).

Troubleshooting

  1. Power

    1. Robot is on but light is off: Either the power cable is loose/unplugged, or a serious electrical issue has occurred and hardware likely needs to be replaced.

      1. Note: This light is hardwired to the 5V power supply of the Raspberry Pi.

  2. Ethernet

    1. Robot is on but light is off: The OT-2R is not currently able to establish a connection over Ethernet.

      1. This is normal for a short period (~1 min) after booting up or after a cable has just been plugged in.

      2. If it’s been longer, check cables and connections.

      3. If all physical connections look OK, try unplugging for 10 seconds, rebooting your robot, and restarting your computer.

  3. Wi-Fi

    1. Robot is on but light is off: The OT-2R is not able to establish a connection over Wi-Fi.

      1. Check your network credentials via Ethernet connection.

      2. Have your IT department check network setup (e.g. enterprise network requiring MAC address allow-listing).

  4. Heartbeat

    1. Robot is on plus this light is on and flashing, but I am still having connection issues: Individual components of the robot may still fail and this light will continue to blink normally.

      1. Reboot your robot and restart your computer.

    2. Robot is on and this light is solid off or solid on: If this light is not flashing, the OT-2R’s operating system has suffered a failure and the system is likely not connectable.

      1. An SD card reflash is probably required.

      2. Hardware replacement may be required if an SD flash does not resolve the issue.

  5. Extra

    1. N/A: This light is not currently in use and should remain off.

Please see below for additional OT-2R documentation:

If you have any questions, please reach out to us at support@opentrons.com or through our live chat!

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