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MODBUS_READ_INPUT_BI(3) libmodbus Manual MODBUS_READ_INPUT_BI(3) NAME modbus_read_input_bits - read many input bits SYNOPSIS int modbus_read_input_bits(modbus_t *ctx, int addr, int nb, uint8_t *dest); DESCRIPTION The modbus_read_input_bits() function shall read the content of the nb input bits 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 0x02 (read input status). RETURN VALUE The function shall return the number of read input status if successful. Otherwise it shall return -1 and set errno. ERRORS EMBMDATA Too many discrete inputs requested SEE ALSO modbus_read_input_registers(3) AUTHORS The libmodbus documentation was written by Stphane Raimbault <stephane.raimbault@gmail.com> libmodbus v3.1.7 04/12/2025 MODBUS_READ_INPUT_BI(3)
NAME | SYNOPSIS | DESCRIPTION | RETURN VALUE | ERRORS | SEE ALSO | AUTHORS
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