While there isn't a single official "One Switch 1.28" product, several technical tools and apps recently released version that feature major switching or control updates. Depending on what you are working with, here are the most likely guides: Bosch eBike Flow App (v1.28)
For server administrators, version 1.28 introduced significant changes to how traffic is switched and handled.
Could you clarify if you're looking for a , a gaming utility , or a specific hardware controller ?
If you are looking to manage a , the 1.28 update introduced a major security "switch" for eBikes.