modbus_read_bits - read many bits

       The libmodbus documentation was written by Stéphane Raimbault <stephane.raimbault@gmail.com>

libmodbus v3.1.6                                   12/09/2019                                MODBUS_READ_BITS(3)

       The modbus_read_bits() function shall read the status of the nb bits (coils) to the address addr of the
       remote device. The result of reading is stored in dest array as unsigned bytes (8 bits) set to TRUE or
       FALSE.

       You must take care to allocate enough memory to store the results in dest (at least nb *
       sizeof(uint8_t)).

       The function uses the Modbus function code 0x01 (read coil status).

EMBMDATA
           Too many bits requested

       modbus_read_bits - read many bits

       The function shall return the number of read bits if successful. Otherwise it shall return -1 and set
       errno.

modbus_write_bit(3) modbus_write_bits(3)

intmodbus_read_bits(modbus_t*ctx,intaddr,intnb,uint8_t*dest);