• wireless connection care;
• Software/hardware watchdog;
• In some harsh environments, factors such as strong interference cause the program to run away and the system to crash. In the absence of human intervention, if the software watchdog cannot solve the problem, the hardware watchdog will play a role. The combination of software and hardware can solve 98% of the problems. Abnormal, automatically restore the normal working state of the system;
• Re-power on and take care--original design.