libmodbus/docs/modbus_rtu_get_rts_delay.md

modbus_rtu_get_rts_delay

Name

modbus_rtu_get_rts_delay - get the current RTS delay in RTU

Synopsis

int modbus_rtu_get_rts_delay(modbus_t *ctx);

Description

The modbus_rtu_get_rts_delay() function shall get the current Request To Send delay period of the libmodbus context 'ctx'.

This function can only be used with a context using a RTU backend.

Return value

The function shall return the current RTS delay in microseconds if successful. Otherwise it shall return -1 and set errno to one of the values defined below.

Errors

• EINVAL, the libmodbus backend is not RTU.

See also

• modbus_rtu_set_rts_delay