
To work on Unisoc/SPD devices in Chimeratool make sure that your drivers are up to date and you are using the latest version.
To check this, open Chimera log in then go to SETTINGS, and click on Reinstall if you are not using the latest version.

Once you madesure that you are using the latest version, you can connect the device.
Usually, you have to connect the device by powering it off and then pressing the VOL DOWN button while connecting the phone to your computer.
An Autodetect procedure will start and you will see the available procedures for the device.

*For the Firmware update procedure you need to use a PAC file, which is a specific file used for Unisoc/SPD.