Image processing device, image processing system and non-transitory readable recording medium

An image processing system comprising:

• a first server;
• a second server;
• and
• an image processing device that communicates with the first server and the second server, wherein
• each of the first and second servers includes:
• a communication controller that establishes a connection that enables communication with the image processing device in response to a connection request from the image processing device and maintains the connection with the image processing device by receiving a periodic communication from the image processing device, and terminates the connection if a predetermined period of time has elapsed without receiving the periodic communication from the image processing device,
• the image processing device includes:
• a main controller that:
• establishes a connection that enables the communication with the first server by sending a connection request to the first server, and establishes the periodic communication with the first server to maintain the connection,
• establishes a connection that enables the communication with the second server by sending a connection request to the second server, and establishes the periodic communication with the second server to maintain the connection,
• manages a first time interval between the periodic communication with the first server, and
• manages a second time interval between the periodic communication with the second server;
• and
• a power controller that stops power supply to the main controller if a predetermined condition is met, and restarts the power supply to the main controller based on the first time interval and the second time interval, and
• the main controller changes one or both of the first time interval and the second time interval and synchronizes a timing at which the main controller establishes the periodic communication with the first server and a timing at which the main controller establishes the periodic communication with the second server to enable the main controller to establish the periodic communication with the first and second servers at the same timing when the first time interval differs from the second time interval.

A non-transitory computer readable recording medium storing a program to be executed by an image processing device that communicates with a first server and a second server, the image processing device including a main controller, wherein execution of the program by the image processing device causes the image processing device to execute a process comprising:

• establishing:
• a connection that enables communication with the first server,
• a periodic communication with the first server to maintain the connection,
• a connection that enables communication with the second server, and
• a periodic communication with the second server to maintain the connection;
• managing a first time interval between the periodic communication with the first server and a second time interval between the periodic communication with the second server;
• stopping power supply to the main controller if a predetermined condition is met, and restart the power supply to the main controller based on the first time interval and the second time interval;
• determining whether the first time interval between the periodic communication with the first server by the main controller is different from the second time interval between the periodic communication with the second server by the main controller;
• changing one or both of the first time interval and the second time interval and synchronizing a timing at which the main controller establishes the periodic communication with the first server and a timing at which the main controller establishes the periodic communication with the second server to enable the main controller to establish the periodic communication with the first and second servers at the same timing when a determination is made that the first time interval differs from the second time interval;
• and
• enabling the power controller to restart the power supply to the main controller based on the one or both of the first time interval and the second time interval that were changed.