Hello,
After quick investigation, it looks like the project is pretty straight-forward, and I can foresee no major issues. I have everything ready to start my work immediately: I do have the hardware to test on - ESP32- DevDitc-V4 (ESP32-WROOM-32 development board), a couple ways to simulate iBeacon (mobile phone / dev-boards for nRF51822, BLE modules from Nordic Semi). And, of course, all the software and esp-idf SDK are installed due to my recent projects was also with ESP32.
There's just few questions I would like to clarify to avoid "ping-pong" delivery model (eg. "in wiegand format via GPIO pins as RS485" - should I provide data as Wiegang through GPIO, or just data on UART for RS485 interface, or both, or have I misunderstand something? and few other pretty simple questions), we can discuss it if you decide to hire me.
I make that low bid due to I have recently started working on Freelancer.com, and I would take that project more like for a good review from you, and I will do everything for in-time delivery of high-quality code.
The time of delivery I stated is 7 days, that is the worst-case estimation, just for never being late with delivery. I will do all my best to present you fully-functional software within 2 (as 'optimistic estimations') to 4 (as 'realistic estimations') days. Also, I am taking into account that there could be more projects I will work on during this period.
Thank you in advance,
Anton