Pedro Henrique Fonseca Bertoleti
Published © GPL3+

Emergency Button for Elderly and People w/ Serious Illnesses

Elderly and ill people always need special care. What do you think about making a device that calls for help anywhere in world?

EasyFull instructions provided3 hours291

Things used in this project

Hardware components

Raspberry Pi Zero Wireless
Raspberry Pi Zero Wireless
- Make sure to solder pin headers. - Before start making the project, be sure your Raspberry Pi Zero Wireless is fully operational. By fully operational, I mean: micro-SD card with Rapsbian installed, wi-fi Internet connectivity working properly and local access or remote access established.
×1
Round arcade button (hole: 34mm)
×1
Male/Female Jumper Wires
Male/Female Jumper Wires
×1

Software apps and online services

Pushbullet account (free)
Raspbian
Raspberry Pi Raspbian

Hand tools and fabrication machines

3D Printer (generic)
3D Printer (generic)

Story

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Custom parts and enclosures

Project repository

This is the project repository. It includes source-code and enclosure/case (stl files).

Schematics

Project schematics

Schematics 7snzveuhxp

Code

Project source-code

Python
import os
from datetime import datetime
import time
import RPi.GPIO as GPIO
import requests
import json

#Global variables:
number_of_times_button_has_been_pressed = 0

#Emergency button GPIO definition:
gpio_emergency_button = 18

#Function: prepare/setup emergency button GPIO
#Params: none
#Return: none
def setup_emergency_button_gpio():
    #setup emergency button gpio as input (using internal SOC pull-up)
    GPIO.setmode(GPIO.BCM) 
    GPIO.setup(gpio_emergency_button, GPIO.IN, pull_up_down=GPIO.PUD_UP)
    return

#Function: send Pushbullet notification
#Params: number of times emergency button has been pressed
#Return: none
def send_pushbullet_notification(number):
	now = datetime.now()
	StringDataHora = str(now.hour)+":"+str(now.minute)+":"+str(now.second)+" em "+str(now.day)+"/"+str(now.month)+"/"+str(now.year)

	StringMsg = "Emergency button pressing #"+str(number)+". Last date/time emergency button has been pressed: "+StringDataHora+"."
	data_send = {"type": "note", "title": "Notification - emergency button", "body": StringMsg}
 
    #ATTENTION: replace "tttttttttttttttttttttttttttttttttt" by your Pushbullet access token
    access_token = 'tttttttttttttttttttttttttttttttttt'
    result_notification_send = requests.post('https://api.pushbullet.com/v2/pushes', data=json.dumps(data_send), headers={'Authorization': 'Bearer ' + access_token, 'Content-Type': 'application/json'})

	return

#Function: verify if emergency button is pressed (and waits for its release)
#Params: none
#Return: none
def verify_emergency_button_is_pressed():
	global number_of_times_button_has_been_pressed

    #if emergency button is pressed, a Pushbullet notification is sent.
	if (GPIO.input(gpio_emergency_button) == 0):
        #Update emergency button pressing counter and send the Pushbullet notification
		number_of_times_button_has_been_pressed = number_of_times_button_has_been_pressed + 1
		send_pushbullet_notification(number_of_times_button_has_been_pressed)		

        #debouncing delay (50ms)
		time.sleep(0.050)

        #waits for emergency button release. 
        # This ensures no risk of sending multiple notifications in just one button press.
		while (GPIO.input(gpio_emergency_button) == 0):
			continue

	return

#------------------------
#   Main program
#-----------------------
time.sleep(30)
setup_emergency_button_gpio()

#Main loop
while True:
	verify_emergency_button_is_pressed()

Credits

Pedro Henrique Fonseca Bertoleti

Pedro Henrique Fonseca Bertoleti

7 projects • 28 followers
Hi there! My name is Pedro Bertoleti. I am aboslutely crazy about: - Electronics - Embedded software design - Technology

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