1 command registers

1. relaySet[3]; bool
2. calibSet[6]; unsigned int
3. relayAutoTimer[3]; unsigned long
4. relayAutoEnergy[3]; unsigned long

2 read registers

1. relayGet[3];
2. powerGet[MAX_PARAMS];
3. relayAutoTimer[3]; same for read
4. calibSet[6]; same for read;
5. energyGet[3]; unsigned long;

data send type

upto 4 byte data byte A= (a&0x000000FF); bool & smaller ints byte B= (a&0x0000FF00)>>8; int (voltages and current multiplied by 100) / by 100 to convert it into f byte C= (a&0x00FF0000)>>16;
byte D= (a&0xFF000000)>>24; // unsigned int for timer and energy