modbus_write_bit

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 function shall return 1 if successful. Otherwise it shall return -1 and set errno.

See also

    •   modbus_read_bits ⟨modbus_read_bits.md⟩

    •   modbus_write_bits ⟨modbus_write_bits.md⟩