# modbus_write_bit(3) Manual Page

## NAME

modbus_write_bit - write a single bit

## SYNOPSIS

int modbus_write_bit(modbus_t *ctx, int addr, int status);

## DESCRIPTION

The modbus_write_bit() function shall write the status of status at the address addr of the remote device. The value must be set to TRUE or FALSE.

The function uses the Modbus function code 0x05 (force single coil).

## RETURN VALUE

The modbus_write_bit() function shall return 1 if successful. Otherwise it shall return -1 and set errno.

## SEE ALSO

modbus_read_bits(3) modbus_write_bits(3)

## AUTHORS

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