Hello,
I found that the value of SENSOR_AR0820_EXP_T1 in function AR0820_SetAeParams of Iss_sensor_ar0820.c (path: /imaging/sensor_drv/src/ar0820/) is 0x2020U, while the register 0x2020 of ar0820 is read only, SENSOR_AR0820_EXP_T2 and SENSOR_AR0820_EXP_T3 also has the same problem, which can be seen in the datasheet of ar0820, as shown in below screenshot:
Where RO in brackets stands for Read Only. This makes the camera unable to accurately perform AE control.
The version of SDK is 7.03, please check this problem.