modbus_get_slave.md 515 B
modbus_get_slave
Name
modbus_get_slave - get slave number in the context
Synopsis
int modbus_get_slave(modbus_t *ctx);
Description
The modbus_get_slave() function shall get the slave number in the libmodbus context.
Return value
The function shall return the slave number if successful. Otherwise it shall return -1 and set errno to one of the values defined below.
Errors
- EINVAL, the libmodbus context is undefined.