Note***:
Ahough this is a open source product. However our tester doesn't support any random firmware upgrade.
The reason as follows:
1. There are some customers brush machine failure experience. In order to avoid damage to the machine, we have disabled the upgrade firmware function.
2. Our factory tester will ensure it's functionality and constantly upgrated. There is no need to update the firmware.
If you need to tester that can update the firmware by yourself, please contact with us beofre you take the order.