Add new Register support SDM 230

[sensorthai]

Hi,
Could you add more register to support SDM 230 model

//SDM 230 registers
#define SDM230_VOLTAGE 0x0000 //V
#define SDM230_CURRENT 0x0006 //A
#define SDM230_POWER 0x000C //W
#define SDM230_ACTIVE_APPARENT_POWER 0x0012 //VA
#define SDM230_REACTIVE_APPARENT_POWER 0x0018 //VAR
#define SDM230_POWER_FACTOR 0x001E //
#define SDM230_PHASE_ANGLE 0x0024 //DEGREE
#define SDM230_FREQUENCY 0x0046 //Hz
#define SDM230_IMPORT_ACTIVE_ENERGY 0x0048 //Wh
#define SDM230_EXPORT_ACTIVE_ENERGY 0x004A //Wh
#define SDM230_IMPORT_REACTIVE_ENERGY 0x004C //VARh
#define SDM230_EXPORT_REACTIVE_ENERGY 0x004E //VARh
#define SDM230_TOTAL_SYSTEM_POWER_DEMAND 0x0054 // W
#define SDM230_MAXIMUM_SYSTEM_POWER_DEMAND 0x0056 //W
#define SDM230_CURRENT_POSITIVE_POWER_DEMAND 0x0058 //W
#define SDM230_MAXIMUM_POSITIVE_POWER_DEMAND 0x005A //W
#define SDM230_CURRENT_REVERSE_POWER_DEMAND 0x005C //W
#define SDM230_MAXIMUM_REVERSE_POWER_DEMAND 0x005E //W
#define SDM230_CURRENT_DEMAND 0x0102 //Amps
#define SDM230_MAXIMUM_CURRENT_DEMAND 0x0108 //Amps
#define SDM230_TOTAL_ACTIVE_ENERGY 0x0156 //kwh
#define SDM230_TOTAL_REACTIVE_ENERGY 0x0158 //kvarh
#define SDM230_CURRENT_RESETTABLE_TOTAL_ACTIVE_ENERGY 0x0180 //Wh
#define SDM230_CURRENT_RESETTABLE_TOTAL_REACTIVE_ENERGY 0x0182 //VARh
http://www.eastrongroup.com/data/uploads/Eastron_SDM230-Modbus_user_manual_V1_4_2015.pdf
http://www.flanesi.it/blog/download/sdm230modbus/SDM230-Modbus%20protocol%20V1.2.pdf

[reaper7]

done