Wireless sensor network and parameter optimization method thereof, and warehouse system

A wireless sensor network, comprising:

• an aggregator;
• a control device connected with the aggregator;
• at least one bridge device connected with the control device;
• and
• at least one mesh module wirelessly connected with at least one of the at least one bridge device and the control device, wherein the at least one mesh module comprises a wireless node, wherein the at least one mesh module comprises a pick-by-light node hosting a lighting device capable of showing different colors and the combinations thereof with visibility larger than 10 meters,
• wherein a mesh network is built by the connections of the at least one mesh module, the at least one bridge device, and the control device, a duty cycle of the at least one mesh module is less than or substantially equal to 10 percent, a command sent by the aggregator is converted into a wireless message by the control device, the wireless message is transmitted by the control device and retransmitted through a first amount of radios and repeated for a second amount of times by the at least one bridge device, the first amount is larger than or substantially equal to 1 and less than or substantially equal to 60, and the second amount is larger than or substantially equal to 2 and less than or substantially equal to 10, so that the wireless message is successfully received by the at least one mesh module.