# PicoFLIP C3 > This project is about 4 years in the making. Shortly after I moved into my bus I installed a latching system for the passenger door. This was so that I could keep it stock in appearance, but remove the chunky lever linkage that could only be opened from the driver side. I have since been using a simple 433mhz key fob and relay attached to an ESPHome node to have easy access through my front door. Unfortunately the keyfob is likely a security risk for myself personally so I've been wanting something more closely in line with the technology I'm using elsewhere in my bus. {% hint style="info" %} {% endhint %} This project is about 4 years in the making. Shortly after I moved into my bus --- # Agent Instructions: Querying This Documentation If you need additional information that is not directly available in this page, you can query the documentation dynamically by asking a question. Perform an HTTP GET request on the current page URL with the `ask` query parameter: ``` GET https://wiki.vdbx.io/coming-soon-ish/picoflip-c3.md?ask= ``` The question should be specific, self-contained, and written in natural language. The response will contain a direct answer to the question and relevant excerpts and sources from the documentation. Use this mechanism when the answer is not explicitly present in the current page, you need clarification or additional context, or you want to retrieve related documentation sections.