The first Kotibussi demo used the very basic ENC28J60 Ethernet controller based ethernet shield. That means the TCP/IP stack had to be run on the Arduino itself, taking up a lot of precious memory. I'm moving it now over to a WizNet W5200 based shield that takes care of the TCP/IP stack in hardware for me, makes a ton of difference in the amount of memory I now have to play with.
Some ideas are to have an integrated RTC and some way to configure the device without re-flashing, aka some control buttons and menu system, the added memory helps a ton in this.
And the backend. Luckily there is a standard for M2M transport data, Siri, unfortunately it is not well suited for low-bandwidth/low-speed/low-memory devices as it is XML based and extremely verbose. And it is also pull based so I would need to poll the data and that is just stupid.
So a Siri2MQTT gateway needs to be created, some minor progress in there, just a skeleton for now but getting there.
Then there is the minor issue that Turku does not provide any data yet (no timetable, they hope to get it open in 2015), luckily some cities in Finland aren't that behind in progress so I will use Tampere Public Transport SIRI service for now.
Showing posts with label Apps4Finland. Show all posts
Showing posts with label Apps4Finland. Show all posts
Wednesday, October 15, 2014
Tuesday, September 30, 2014
KotiBussi, 3 place and shared challenge price
Related to the previous post in Finnish. It is a description of my entry to the regional app4finland competition, a simple home Buss information display concept.
The idea is to have realtime display of buss(es) on a simple display so you know when to run to the buss-stop. The idea came when I started to think about what is the most annoying thing with using public transport here in my home city of Turku. I personally hate to stand at the buss-stop and wonder where the hell is it, or did it go already ? And at this time there are just a handfull of stops with information displays (that don't even display correct information, last time I needed to take a local buss).
Yes, you can get that from an app or web site. But not everyone has a smartphone. And how much time does it take to first dig the from somewhere, start the app, wait for it to load, then find the particular buss/buss-stop, etc (but the backend could be used for a mobile app, so that is not ruled out)
And this could be used not only at home, but for example at the work place, stores and hospitals. Well, you get the picture.
And instead of having the device polling the information, it uses MQTT to passively listen for changes and that means it does not need much of processing power, a basic arduino is just fine.
The backend part is still to be written, basically a SIRI to MQTT gateway.
Oh, the important part, I won! Third place in one category and shared winner of a specific challenge (transport).
The idea is to have realtime display of buss(es) on a simple display so you know when to run to the buss-stop. The idea came when I started to think about what is the most annoying thing with using public transport here in my home city of Turku. I personally hate to stand at the buss-stop and wonder where the hell is it, or did it go already ? And at this time there are just a handfull of stops with information displays (that don't even display correct information, last time I needed to take a local buss).
Yes, you can get that from an app or web site. But not everyone has a smartphone. And how much time does it take to first dig the from somewhere, start the app, wait for it to load, then find the particular buss/buss-stop, etc (but the backend could be used for a mobile app, so that is not ruled out)
And this could be used not only at home, but for example at the work place, stores and hospitals. Well, you get the picture.
And instead of having the device polling the information, it uses MQTT to passively listen for changes and that means it does not need much of processing power, a basic arduino is just fine.
The backend part is still to be written, basically a SIRI to MQTT gateway.
Oh, the important part, I won! Third place in one category and shared winner of a specific challenge (transport).
Thursday, September 25, 2014
Kotibussi, Apps4Finland demo konsepti
Kotibussi, Apps4Finland innosta sarjaan demokonseptilaite, josta näkee nopeasti seuraavan bussin tiedot kotoa, ilman tarvetta puhelimelle tai tietokoneelle.
Demolaitte on toteutettu Arduino, Ethernet shieldillä ja LCD näyttöllä.
Arduinossa pyörii MQTT client joka kuuntelee MQTT palvelimella olevia pysäkkitietoja ja päivittää realiajassa tiedot tulevasta bussista, sekä sitä seuraavasta.
Oikeassa toteutuksessa MQTT palvelimelle tiedot haettaisiin reaaliaikaisesta SIRI syötteestä, joka Turun seudulla on tulossa 2015.
Näin bussin käyttäjän ei tarvitse juosta pysäkille seisomaan turhan takia vaan voi rauhassa katsoa näytötä ehtiikö vaikka vielä juomaan aamukahvin loppuun vai ei.
BS: Pysäkin numero
L: Linjanumero
N: Nyt tuleva bussin arvioitu min:sec saapumisaika
S: Seuraavan bussin arvioitu min:sec saapumisaika
Demo ohjelman koodi löytyy github:sta.
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