Smart Bus Stop Information System

System Overview

Smart bus stops improve public transport experience by providing real-time information and reducing perceived wait times.

Hardware Components

• Raspberry Pi 4: Main controller
• E-Ink Display (7.8"): Low-power display
• 4G/LTE Module: Internet connectivity
• PIR Sensor: Passenger detection
• Camera (optional): People counting
• Solar Panel: 50W with battery

Display System

# Display bus arrivals
from waveshare_epd import epd7in8_HD

epd = epd7in8_HD.EPD()
epd.init()

# Fetch arrival data
arrivals = get_bus_arrivals(stop_id="STOP_001")

# Render display
epd.display(epd.getbuffer(arrivals_image))

def get_bus_arrivals(stop_id):
    response = requests.get(
        f"https://api.transit.com/arrivals?stop={stop_id}"
    )
    return response.json()

Bus Tracking

Integration with transit APIs:

• GTFS-Realtime: Standard transit feed
• NextBus API: Common in North America
• TfL API: London transport
• Custom MQTT: Private fleet tracking

Passenger Counting

# People counting with PIR
import RPi.GPIO as GPIO

PIR_PIN = 17
passenger_count = 0

GPIO.setup(PIR_PIN, GPIO.IN)

def count_passengers():
    global passenger_count
    if GPIO.input(PIR_PIN):
        passenger_count += 1
        publish_count(passenger_count)

# Publish to cloud
def publish_count(count):
    mqtt_client.publish("busstop/passengers", count)

Mobile Integration

Mobile app features:

• Real-time arrivals at saved stops
• Service alerts & delays
• Crowding information
• Trip planning
• Report issues at stop