Abstract: An electronic device is connected to an Inter-Integrated Circuit (I2C) expander using an I2C controller of the electronic device. The I2C expander is connected to the servers. Each of the servers corresponds to an identification number. Method of controlling baseboard management controller (BMC) of servers using the electronic device includes receiving identification numbers and determining an operation mode corresponding to each of the identification numbers. According to the identification numbers, each of the identification numbers corresponding to a determined server, servers are determined. The electronic device is controlled to connect to the determined servers. A restart server group comprising one or more determined servers whose operation modes are to restart BMC is determined. A restart signal is transmitted to the restart server group. A BMC of each of the one or more determined servers in the restart server group are controlled to restart according to the restart signal.

Abstract: In a method for testing an aperture of the image capturing device, a brightness value range of images is divided into a plurality of range intervals, and one of the range intervals is determined for testing the aperture. A brightness value of a current image captured by the image capturing device is calculated. A diameter of the aperture is controlled to increase or decrease to change the brightness value of the current image to be within the determined range interval, if the brightness value is not within the determined range interval. After the brightness of the current is changed to be within the determined range interval, if the brightness value of the current image has been changed during a predetermined time period, it is determined that the aperture does not work normally.