Hi, Everyone.

I introduce my mbed project. I've making real-time bus arrival alarm device based on WIZnet WIZwiki-W7500 mbed IoT platform board. This device project for busy people in the morning. Perhaps, you could be more freely checking bus arrival without mobile phone by this device.

* This project made by korean. If you live in foreign country, you may need to be modified for Bus information system in yours.

Step 1: Concept

Step 2: Parts

For this instructables, you'll need next things.

WIZnet WIZwiki-W7500 IoT Platform board
- W7500 MCU embedded, 32-bit ARM® Cortex™-M0 core with Hardwired TCP/IP
- ARM mbed official platform board
- for more details, refer to the http://wizwiki.net/wiki/doku.php?id=products:wizwi...
Seeed Studio Grove Devices
- Grove OLED Display 96x96
- Grove 4-Digit Display
- Grove Buzzer
- Grove Base Shield v2 and Connectors
- for more details, refer to the http://www.seeedstudio.com/wiki/Grove_System
A Computer connecting to Internet
- ARM mbed platform provided Web compiler (IDE)

Step 3: Hardware Configuration

Step 4: Used Libraries

mbed / Ethernet
HTTP client
NTP client
Grove OLED display 96x96
Grove 4-digit display

Step 5: Get the Bus Arrival Informations

Note: These steps for using GBIS (Gyeonggi Bus Information System) in Korea.

Following next steps.

Check and get the Bus number and station(bus stop) number you need.
Get the Bus base information using openAPI (refer to below URL example)
Lookup the matched route ID and station ID in route / station database using bus number and station number.
Get the Bus arrival information using openAPI (refer to below URL example)
Done

Step #2 URL Example: Bus base information request (key)

http://openapi.gbis.go.kr/ws/rest/baseinfoservice?...

Step #4 URL Example: Bus arrival information request (key, routeID, stationID)

http://openapi.gbis.go.kr/ws/rest/busarrivalservic...