core: Gateway Mysensors problem

Home Assistant release with the issue: 0.97

Last working Home Assistant release (if known):

Operating environment (Hass.io/Docker/Windows/etc.): Hass.io 170

Component/platform:

Description of problem: Hi I have this gateway: https://www.mysensors.org/hardware/sensebender-gateway and i have connected it to RPI4 with Hass.io

After restart i get info in logs:

Log Details (WARNING)
Thu Aug 08 2019 08:04:52 GMT+0200 (czas środkowoeuropejski letni)
Gateway /dev/ttyACM0 not ready after 15.0 secs so continuing with setup

But gateway works ok… Maybe is any chance to add more time to timeout ?

Problem-relevant configuration.yaml entries and (fill out even if it seems unimportant):

Traceback (if applicable):

Additional information: