When using the B2 quadruped robot, the robot may be abnormal. Most abnormal situations are
controllable (there are solutions). The users should not panic when encountering these problems. Read the
following contents in detail and solve the problems step by step.
If you have any questions, please contact Unitree Robotics official technical support:support@unitree.cc.
1) Self-testing fails after startup
If the robot fails to stand up after lying on the ground for 2 minutes during startup, it indicates a failed
self-check. In this case, the robot needs to be rechecked following the "Check before Power on" and
"Preparation before Power on" steps before attempting again.
2) Self-testing fails after startup
In the use of Unitree Robotics official movement control program (control the robot move by using the
remote control), the robot will switch to self-protection status as a result of falling down caused by the external
environment reasons (lack of friction, etc.) on the surface or improper operation, the motor of the robot will
automatically switch to the braking state to protect the various parts.
3) App connection abnormality
If using the AP direct connection mode, check if the phone is connected to the AP hotspot emitted by the
B2. If the hotspot configuration fails, ensure that the hotspot name does not contain special symbols and spaces.
Also, ensure that the robot and the phone are close to each other, then restart the robot and the App to attempt
the connection again.
4) How to turn off the robot when the remote control module fails
When encountering the failure of the remote control module (such as the handle battery exhaustion, etc.),
the remote control buttons cannot be used to make the robot lie on the ground and standby. The only way to
forced shutdown is to press the battery supply button.
Forced shutdown: Keep the robot at least 2 meters away from obstacles, complex ground, crowd, water,
and other objects. Hold the head and tail of the robot, short press the power switch once, and then long press
the power switch for more than 3 seconds to turn off. Move it to the ground slowly after powering off.
5) The robot is easy to fall down and cannot stand when powered on
If the robot fails to stand up after startup due to incorrect startup posture leading to incorrect motor angles,
restart the robot with the correct startup posture. If restarting the robot does not resolve the issue, it is necessary
to recalibrate the robot joints according to the relevant steps in the Unitree Explore App.
Note: B2 has been calibrated by default after leaving the factory. Do not recalibrate the joints for normal
use! If any abnormal situation occurs with the B2, please consult Unitree's official technical support before
determining whether joint recalibration is necessary.
The entrance for joint calibration in the App is [Settings] -> [Data] -> [Robot Dog] -> [Calibration].
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