Hubitat allows for opening and maintaining a connection to a telnet endpoint from the hub. All code needs to be contained in a driver, there is no option to open a telnet connection from an app. Hubitat provides methods to connect and disconnect to the endpoint, in addition it is required to create a method in the driver that accepts incoming messages (parse) and another method that will be called with any status updates for the endpoint (telnetStatus).
Hubitat Provided Methods
void telnetConnect(Map options, String ip, int port, String username, String password) void telnetConnect(String ip, int port, String username, String password)
ip - The IP Address of the endpoint you want to connect to port - The port number of the endpoint, typically 23 for telnet interfaces username - The username to use to log in, pass null if no username is required password - The password to use to log in, pass null if no password is required options - The options to use when connecting to the telnet interface.
User defined methods
parse(String message) - This method is called with any incoming messages from the telnet endpoint. This is a standard method for drivers.
telnetStatus(String message) - This method is called with any status messages from the telnet connection (disconnections, errors during connect, etc)