Frank's guests just need to get the Doorking 16120 default key and start letting themselves in.
Edit: undergrad shenanigans from ten years ago:
Our university student-run electronics lab had an issue: technically anyone with a student card was allowed on premises at any given time, but the department only gave us a small set of keys that we had to share with the rest of the student associations. Obviously we needed a solution.
We did some snooping and found that the request-to-exit button wire was running on a cable tray alongside all the other wiring and plumbing, as the lab was in the basement. We picked a suitably dark, inconspicuous spot and wired up a Raspberry Pi driving a transistor and in turn a relay which we then wired in parallel with that button. Users could then connect to the local lab wifi and then SSH into the device. Login shell was replaced with a script that pulsed the GPIO line for half a second and subsequently caused the door to open.
We never got caught and apparently all the evidence was destroyed when the building was renovated a few years later.
ESP8266 came out 2014, around the same time as the first Pi, besides the myriad of wifi enabled uc options before that. First Arduino (let's say for ease of use) with wifi built in was 2013.
Lmao people already getting mad. It's honestly just way simpler doing something like that with a microcontroller/realtime rather than a pi running all sorts of processes/reboots/sd card issues etc.
Oh yeah for sure and if they had come back with "oh yeah we only had that" (they did) I would've been like "ah okay makes sense!"
But for people to react negatively to my comment in the first place is hilarious and predictable human behaviour. Honestly it doesn't really necessitate explanation, imo.
We had to come up with something wireless for authentication as we did not want to install anything visible like RFID readers. We also had a few Pis lying around.
Edit: undergrad shenanigans from ten years ago:
Our university student-run electronics lab had an issue: technically anyone with a student card was allowed on premises at any given time, but the department only gave us a small set of keys that we had to share with the rest of the student associations. Obviously we needed a solution.
We did some snooping and found that the request-to-exit button wire was running on a cable tray alongside all the other wiring and plumbing, as the lab was in the basement. We picked a suitably dark, inconspicuous spot and wired up a Raspberry Pi driving a transistor and in turn a relay which we then wired in parallel with that button. Users could then connect to the local lab wifi and then SSH into the device. Login shell was replaced with a script that pulsed the GPIO line for half a second and subsequently caused the door to open.
We never got caught and apparently all the evidence was destroyed when the building was renovated a few years later.