NAO Messages¶
Meaning of the vocal warnings¶
Here is the meaning of each warning of the robot.
When NAO is on¶
| NAO says ... | When ... |
|---|---|
| “Motor hot” | The motor of a joint is getting too hot. The joint will become less stiff. |
| “Battery low” | The battery is out of charge. The robot is about to turn off. |
“Head processor hot” with its eyes blinking |
The CPU in the head is getting too hot. It is better to turn off the robot: its behavior could be unexpected and if the temperature keeps increasing (>110 degrees Celsius), it will turn off automatically. |
“Head processor overheating, shutdown” with its eyes blinking |
The CPU in the head is getting too hot (>110 degrees Celsius), the robot is about to turn off automatically. |
During boot process¶
| NAO says ... | When ... |
|---|---|
| “Errors occurred during the boot, I will not work as usual. Any change done during this session will be lost after reboot. A reboot can fix this. If this happens again, please contact the support.” | Something goes wrong during the boot process, the flash memory dedicated to user purposes will not be available until reboot. This may occurs several consecutive times. If this happens, try stop NAO, wait for a while then boot again. |
| “Errors occurred during the boot, I will not work as usual. My head will not respond as expected, especially my audio and video capabilities. A reboot can fix this. If this happens again, please contact the support.” | Something goes wrong during the boot process, the memory storing the head hardware configuration is unavailable until reboot. This may occurs several consecutive times. If this happens, try stop NAO, wait for a while then boot NAO again. |
| “The system upgrade to the version X.Y.Z has failed.” | Something goes wrong during the software version update that was planned during the session before the last boot of NAO. The software is not updated. |
| “The system upgrade succeeded, I am running the software version X.Y.Z.” | The software version update that was planned during the session before the last boot of NAO succeeded. |
| “My body is disabled because the hardware is too old. The current hardware version is ... whereas my software needs a hardware version greater or equal to ...” | The current software version is too recent and does not support the current hardware (i.e. NAO’s body). For safety reasons, the body is disabled and it is no longer possible to stiffen its joints. Solution: the software version should be downgraded. |
| “My body is disabled because the software version does not meet the requirements. The current software version is ... whereas my body needs a software version greater or equal to ...” | The current software version is too old and does not support the current hardware (i.e. NAO’s body). For safety reasons, the body is disabled and it is no longer possible to stiffen its joints. Solution: the software version should be upgraded. |
| “To complete my upgrade, please make sure that I am well charged, unplug my charger and re-boot me” | The charger is plugged and disturbs the upgrade of the card controlling the Inertial sensor. This error is not systematic, it may occur in case of disturbances on the power distribution network. Solution: do as required by NAO, in order to perform the upgrade without the disturbance. |
Meaning of the LEDs¶
Chest button on boot time¶
| LEDs | Meanings |
|---|---|
 |
Blinking blue light means that a Firmware update has been requested. Wait until the process is finished. |
 |
During the boot process, a steady green light indicates that the boot process is stuck in the boot loader. Contact the Aldebaran team if it happens several times. |
Chest button when NAO is on¶
| LEDs | Meanings |
|---|---|
 |
A steady white light indicates that the robot is on, ready to use. |
|
A steady green light indicates that the battery charge is higher than 3/5. |
 |
A steady yellow light means that the battery charge is less than 3/5 and higher than 1/5. |
A slow yellow blinking light means that NAOqi is not running. Restart NAOqi or your robot. |
|
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A red blinking light means that the battery charge is less than 1/5. You should charge immediately. |
Ears on boot time¶
While the booting up, progress is displayed on NAO’s ear LEDs in 4 steps:
| Ear LED Brightness | Means ... |
|---|---|
| 0 % | The robot is in the early boot step, initializing the hardware. |
| 25 % | Hardware is initialized. |
| 50 % | Filesystems are ready to use. |
| 75 % | Network and ssh are started. |
| 100 % | NAOqi is started. |
Ears on upgrade¶
When upgrading the embedded system, to make things clearer to understand, the boot progress displayed on ear LEDs is divided in 4 steps:
| Ear LEDs | Meaning |
|---|---|
| The front half-circle is blinking. | Checking integrity of the image to be flashed. |
| Animation like a progress bar. | The OS image is being flashed. |
| The rear half-circle is blinking [1]. | Checking integrity of the flashed data. |
| The front and rear half-circles are alternatively blinking [1]. | Restoring factory settings. |
| [1] | (1, 2) Only on NAO v4. |