# SONOFF MINI-ZBRBS Zigbee **URL:** \ **Category:** Free discussion\ **Created:** [September 26, 2025, 11:51am UTC](https://forum.ewelink.cc/t/sonoff-mini-zbrbs-zigbee/205848 "2025-09-26T11:51:51Z")\ **Posts on this page:** 1\ **Showing post:** 6
**Author:** ![ociepa.ekotox](https://avatars.discourse-cdn.com/v4/letter/o/c68b51/32.png) [@ociepa.ekotox](https://forum.ewelink.cc/u/ociepa.ekotox)\ **Post date:** [September 27, 2025, 9:54am UTC](https://forum.ewelink.cc/t/sonoff-mini-zbrbs-zigbee/205848/6 "2025-09-27T09:54:11Z")
You may be right. I don’t have a ZBMINI-RBS to confirm this error. I use a MINI-RBS and know that the relays disconnect after 2 minutes, regardless of whether the engine stops. If it’s as you say, you should report the issue to Sonoff. > [@MINI-RBS: Calibration Bug? Motor Always runs for 2 Minutes](https://forum.ewelink.cc/t/mini-rbs-calibration-bug-motor-always-runs-for-2-minutes/197045/5): > > Hi ilGaspa, The MINI-RBS controls the curtain’s position using precise timing based on a percentage scale. For example, moving the curtain from 1% to 51% open runs the motor for half of the total calibrated time. However, because the motor takes a moment to start, it may not reach exactly 51%, stopping closer to 49%. This small discrepancy means the curtain’s position isn’t always perfectly accurate and can worsen if repeatedly stopped mid-position. To ensure the curtain fully opens (100%) or … --- _[View the full topic](https://forum.ewelink.cc/t/sonoff-mini-zbrbs-zigbee/205848)._