After install the V2.1 Robot Car or 2WD Robot Car framework, please insert to OSOYOO ESP32 Wifi/Bluetooth Shield into the UNO board. Connect the H-Bridge Motor board to Arduino Pins as per following picture:

Use Jumper cap to Connect D4 to ATTX and D5 to ATRX pin in ESP32 Shield
Download The Arduino Code from following link:
https://osoyoo.com/download/e32_mockdrive.zip
Unzip the e32_mockdrive.zip file, double click e32_mockdrive.ino file and open it in Arduino IDE.
Step 1) Found the the BLE device address

Write down the BLE Address shown in above red circle. You need to connect this BLE device in the Imitation Driving APP.
Finally, please put the robot car on the ground and turn on the battery.
Step 2) Download and Install OSOYOO Imitation Driving APP from following link
https://osoyoo.com/test/mockdrive.apk
After Install Above APP in your cell phone. You will see a new APP icon in your cell phone:

Step 3) Connect Robot Car BLE device to mobile Phone
Open the APP and Click Connect Button as following:

After Clicking Connect, a Bluetooth device list manual will pop up. As ESP32 is a BLE device, the list will show BLE device Scanning as following picture:

After about one minute, BLE device scanning will change to BLE Device Found, please select the BLE device whose address matches the address shown in Step 1)

Once the BLE is connected, you can DRIVE the car with APP.
Control Button in the APP
DownLoad Url osoyoo.com