# Ideas/ways to unlock the main door **URL:** \ **Category:** Ideas & Suggestions\ **Created:** [January 1, 2020, 3:57am UTC](https://community.homey.app/t/ideas-ways-to-unlock-the-main-door/23525 "2020-01-01T03:57:06Z")\ **Posts on this page:** 1\ **Showing post:** 5
**Author:** ![G.P\_Bruins](https://sea1.discourse-cdn.com/flex025/user_avatar/community.homey.app/g.p_bruins/32/711_2.png) [@G.P\_Bruins](https://community.homey.app/u/G.P_Bruins)\ **Post date:** [January 1, 2020, 11:44am UTC](https://community.homey.app/t/ideas-ways-to-unlock-the-main-door/23525/5 "2020-01-01T11:44:22Z")
Hi Khangwei, Happy 2020 2U! See my reaction of April 2019 on a related subject: > [@Acces control Heimdall and Homey](https://community.homey.app/t/acces-control-heimdall-and-homey/3159/46): > > As my access control open my door (Danalock V3 BTZE) and switches of my alarm (Heimdall) I don’t want to use any RFID device with the electronic part on the outside of the house. If you know a little bit about GND, NO and NC contacts you could bypass the RFID bit after destroying its casing. I have therefor chosen a RFID reader with a separate coil to be fitted on the outside wall and the electronic part to be fitted inside the house. I have used it in combination with a 12v relais and a modifie… Works like a charm! Guus --- _[View the full topic](https://community.homey.app/t/ideas-ways-to-unlock-the-main-door/23525)._