When making IoT development, you need to debug on the Field. I’ve been using some serial logger to store information and analyze them after (I’ll post something about it once a day). But sometime you want to watch it in real time. So you need a small terminal you can easily transport with you. Smartphone could be cool and I’m sure we can hack something fun with a BLE connectivity. By the way, what I had in stock for doing a such thing was a Wio Terminal from Seeed.
This device is an Arduino compatible solution including a LCD screen 320×200, some interesting embedded sensors and a lot of IO to play with. The only bad point for me and the design I want to do is the absence of internal battery so you need to power it a different way.
What I need is just a Serial line to print on the LCD screen all what my IoT device want to share. Let see how I did make it.
I wanted to play with my Balena Fin and make the famous Bird-Watcher but unfortunately, the documentation is a bit light to be able to reproduce it simply. So finally, I’ve decided to make a post about this project and the different steps to make it working.
The project is now deployed on a tree at home and waiting for some birds to be photographed.
In a previous post, I’ve been introduce my home made LoRaWan solar powered outdoor gateway. I’ve been investigating on the minimal hardware to make it running and reach some interesting result in my garden ;). Now it’s time to deploy the gateway on the field (basically on a roof top) and this means I’ll not be able to continue to learn what how it evolves over time.
For this reason, I’ve made a small project to monitor the main elements I want to track about this gateway:
Battery in & out power
5V powering availability
For this I’ve selected a simple and LoRaWan all-included Arduino platform I already detailed in a previous post: the LoRa Radio Node. Let’s detail this project now available on github.
The TD1204 modem firmware is a easy to use solution for sending message to Sigfox network. It starts to be complex when you want to create your own message including the GPS position. The standard firmware returns the satellite NMEA frames in text mode and you have to process it.
To make it simple I built a modification of the standard modem firmware to add an extra command to enrich a message with a GPS coordinate automatically.
The TD1204 / TD1208 Raspberry PI shield is following HAT standard. Is can be use with a RaspberryPI B+ or Raspberry PI 2. It includes 3 programmable leds plus the TelecomDesign Led. Some and the GPIO of the TD chip can be read/write from the RaspberryPi, Some can be cabled on the small customization area to add you own components.
The shield can be delivered with an external antenna of use with an SMT antenna.
Telecom Design chip can be flashed with an FTDI cable or directly with the RaspberryPi
This shield is not SigFox certified so it can only be used for prototyping usage.
Not really a news, but an interesting update on two new devices sold since march 4th, Atom family have, at least, two new Core, the first one is the N2650, the second one the N2850, they are two dual core, 4 thread CPU for netbook with a really low TDP.
The N2850 offers a 2GHz system with a 10W TDP, the N2650 offers a 1.7GHz system with a 3.6W TDP.
This has to be compared with my current reference (making no sens for you … but …) the D525 offering 1.8GHz for 13W. More over the IGP has been push from 400MHz to 640MHz on the N2850.
This configuration sound really interesting to build small and fanless machine… now we need to see the first box including these chips.
See Atom family on wikipedia : http://fr.wikipedia.org/wiki/Intel_Atom
Intel aurait en prévision de fournir des quad-core Atom en 2013
Une très bonne nouvelle pour des machines silencieuses, toujours plus performantes même si la multiplication des cores pour une machine de bureau n’est pas forcement une nécessité absolue, une solution quadcore trouvera toujours sa place pour les activités multimédia.
Espérons que ces processeurs apporteront surtout un fréquence plus élevée, toujours par refroidissement passif, en bénéficiant par exemple d’une fonction boost désactivant les core superflus… rêvons.
Comme promis, voici les résultats du test comparatif de mon Zotac mini PC (ZBOX ID41) à base de D525, comme d’habitude, c’est lmbench3 qui me permet de faire les tests, ceux-ci étant mono-threadés, il faut prendre en considération que la machine offre un double coeur à 4 threads.
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