RS485远程售电加密方案，主机发读数据命令，读取表内当前剩余电量。 -RS485 remote sale of electricity encryption scheme, the host read data command issued, the current remaining capacity to read the table.

Energy cost of transmitting a single bit of information is approximately the same as that needed for processing a thousand operations in a typical sensor node. Thus, a practical way to prolong a wireless sensor network lifetime is to reduce the senso