I too use the insteon-mqtt. If you go with it, you’ll have to use the serial modem.
The 2245 is not as reliable as the serial modem. In short, the 2245 only provides a Web interface to communicate with it so it has to be polled. The polling uses a “circular buffer” inside the 2245 that can overload, and even worse the 2245 itself can sometimes clear out before being read, so information can get lost.