Flash Meeting Reminder Using Raspberry Pi

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Flash Meeting Reminder Using Raspberry Pi

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As we work at home and spend a lot of time on the phone talking to clients and vendors. Our employer uses Google Apps (which includes Google Calendar and Gmail) and the appointment notification capabilities of both are not very robust. Well, they’re robust, but not enough to get me to actually show up for calls on time. What I find is that I often miss the notification when I’m busy doing something else or I notice the notification, but quickly forget about it just a few minutes later and ultimately miss some meetings or join late. In this project a more effective way to alert of upcoming appointments. As we spend a lot of time on the phone, didn’t want an audible alert, so I decided I’d do something visual. Here we will use a led array for the Raspberry Pi that consists of a 4 x 4 array (that’s 16 total if you’re counting) of bright RGB LEDs. Here we wrote a Raspberry Pi application that connected to Google Calendar API and checked our calendar for my next appointment then flashed those 16 LEDs to let us know. As long as I was conscious, and in the room, I’d likely see them and decrease my chances of missing an appointment.


Raspberry Pi is attached with a 4 x 4 array of RGB LED’s. This application is written in the python program which is attached with the Google Calendar API where our total schedule of appointment is stored. The code will check the calendar every minute for appointments that start within the next 10 minutes. If there’s an appointment starting between 10 and 5 minutes from now, the lights will all flash white for a second or so. Between 5 and 2 minutes, the lights will all flash yellow twice. At less than two minutes until the appointment start, the lights will swirl in a multi-color splash.


In the existing system, normal notification which will be stored in the calendar, manually checking it in the calendar which has a disadvantage of missing or getting delay to the appointment.


In this proposed system, the reminder is used using the flashing lights which will be directly connected to our GOOGLE CALENDAR API which will automatically fetch the appointments and will give the indication using the lights according to the time.


Flash meeting Reminder Using Raspberry PI


  • In this project Meditation time a dose is being saved in the Google calendar database.
  • 4×4 matrix RGB LED’s are connected to the Raspberry pi.
  • Connect power supply for Raspberry pi
  • Plug the HDMI cable in Raspberry pi from the monitor using VGA to HDMI converter cable
  • Connect USB Mouse and USB keyboard to the Raspberry pi
  • Output alarm will be given as a RGD LED FLASING.


  • Raspberry Pi 3
  • 4×4 RGB LED’s.
  • SD card
  • Monitor


  • Raspbian Jessie
  • Google calendar API.
  • Language – Linux
  • Python


This system give a smart way of connecting our Google calendar schedules with the Raspberry pi to give a perfect time reminder using the led flashing. It can be used to make our life easier, so that we dint miss any appointment or get late to any appointments.


[1] “Smart home medication reminder system” in 2017 25th International Conference on Software, Telecommunications and Computer Networks (SoftCOM).

[2] “Elderly Cardiac Patients’ Medication Management: Patient Day-to-Day Needs and Review of Medication Management System” in 2013 IEEE International Conference on Healthcare Informatics.

[3] “Medication adherence by using a hybrid automatic reminder machine” in 2016 IEEE International Conference on Consumer Electronics (ICCE)

Additional information

Weight 1.000000 kg


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