Nodemcu and octoprint 3d print status indicator

During the coronavirus pandemic in March 2020, a situation arose where we had to maximize our productivity of face Shields to meet a donation order of 5000 numbers for medical personals. The 3D printer was situated in the outhouse and had to start a new print every 30 minutes after removing the previous print from the print bed.
In order to maximize productivity, I placed this Wi-Fi-based print status indicator in my living room and as soon as the print is finished, a blue LED in the NodeMCU lights up, which is seen by me, father or sister in the household and they will go and put the next print after removing the existing 3D printed model from the heat bed. Using this, I was able to print 70 face shields per day from a single 3D printer.