Hello guys, blynk is awesome app, I really like it, but I didn’t find way how to talk with my raspberry pi over bluetooth. I searched across forums but didn’t find anything, it’s strange because there is bluetooth option for raspberry pi in android application. That is why I started to explore source code of blynk-library, especially bluetooth section and wrote some code to implement bluetooth for raspberry pi. I’m not really good at nodejs but here what i done: https://github.com/bolsunovskyi/blynk-pi-ble (source code)
I tested it with my rpi zero and it’s working. Please let me know if it will work four you 
P.S. Вижу тут много топиков на русском языке, потому продублирую на всякий случай. Не нашел как использовать blynk c raspberry pi через bluetooth, написал свою библиотеку для этого, вот решил поделиться. Если кому пригодится отпишитесь как и что