to use in a button sketch there is some economical wireless option?It was for simhub sketch (leds and displays) since hc-05 will only appear as a serial port it can't be used for gamepad features in all cases.
And changing the subject, I downloaded the template for 919 for nextion and TCF does not work, I guess simhub does not take telemetry right? Neither are the two battery bars, is there telemetry of that? I have tried iracing and corsa assetto