The following declarations in the .h file are not implemented in the .cpp file:
int coilWrite(int address, uint8_t value);
int coilWrite(int id, int address, uint8_t value);
int holdingRegisterWrite(int address, uint16_t value);
int holdingRegisterWrite(int id, int address, uint16_t value);
The following declarations in the .h file are not implemented in the .cpp file: