本代码为与电能表相配套的掌上通讯设备的源程序，遵循电力654规约与电能表的通讯。-This code with the broad power of the handheld communications equipment supporting the source code, follow the power 654 of the Statute of communication with the energy meter.

code for Power factor meter in 8051-mcu, 16x2 char lcd in 4-bit mode.