¶ Unitree Go2 FAQ
What the diffrence between AIR and PRO and EDU, which one to choose?
From a hardware perspective, the AIR lacks:
- Speaker
- Offline voice assistants
- UWB module
- Some software features (AI mode, 3D mapping) are cut off in the Unitree APP
The PRO has all the above features and, from a hardware perspective, is equal to the EDU except for:
- Foot sensors
- Jetson payload on the back
So, the short answer is, if your budget fits, the PRO is the best choice.
Why in the Unitree technical description are the speed and torque for the AIR much less than for the PRO/EDU?
AIR uses the same motors as the higher models, so Unitree artificially limits the speed and torque for the AIR model. This was proven by findings in the decompiled legged_sport service. Enabling secondary development gets rid of that limitation.
Where is the best place to buy the Go2?
The best option is to buy directly from Unitree at sales_global@unitree.cc. When ordering directly, you can ask to replace the standard battery with the extended one. This will add around $200 to the price but will provide 2 more hours of use and a better experience. Keep in mind that there could be some customs fees on top of the price.
Is there any discount if ordering directly from Unitree?
Yes, a discount of 5% for AIR and 10% for PRO can be applied for any customer from the North America region. Just contact sales at sales_xjc@unitree.com and specify the referral code 'theroboverse'. The sales manager will provide you with a custom payment link.
Do i need a hanheld remote control?
From my experience – YES. The handheld remote works through LoRa and provides a 100m range and a better tactical experience than the app. Additionally, there are cases when the app gets disconnected from the Go2 for some reason, causing the dog to lose control.
Can I develop on my Go2 AIR/PRO as EDU users can?
Yes, by gaining_root_access and enabling secondary_development, you can use any SDK (official or unofficial) to develop your own applications. Currently secondary development is supported on 1.0.19 - 1.1.1
Can i use AIR with AI mode?
By default, this feature is not available, as Unitree tries to make AIR an entry-level device and drive sales of the PRO and EDU models. AI mode can be launched on AIR by adding the missing services. Refer to the Enable AI Sport mode on AIR
Is there an E-stop on the Go2?
By default, no. However, if you short the below, it release the motors instantly. But you should re apply power or turn off/on the dog to recover.
Whats the diffrence between jailbreak and secondary development?
The jailbreak provides root access to the device. Once you have root, you gain full control over the running processes, can run your own code on the robot, and install new packages, among other things.
Enabling secondary development involves applying patches to Unitree's binaries to unlock the DDS middleware on AIR/PRO models. This allows the use of any official or unofficial SDK, which is the main feature of the EDU model. Secondary development requires a jailbreak (root access), as it primarily involves modifying the running services.
Whats so special about 1.1.1 package version?
Version 1.1.1 was the first firmware released by Unitree to combat the current jailbreak methods and block enabling secondary development on AIR/PRO models. It was also the first firmware to update the MCU, making it incompatible with older package versions, thus preventing downgrades.
Can i downgrade from 1.1.1 to 1.0.25 and use secondary development there?
The short answer is no. Since version 1.1.1 includes a new MCU firmware that is incompatible with older versions, downgrading will result in Unitree services failing to start. However, if you attempt this, you can reflash version 1.1.1 to restore functionality.
I recently received a Go2 AIR/PRO. How can I check if Secure Boot is enabled? Can secondary development be enabled?
Yes, firmware versions up to 1.1.4 are currently supported. You can check if your device has Secure Boot folowing this manual