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Back to work

Ok, so let’s do a summary of the two last days of work.

I took a look at Wizzilab SDK, and Opentag, finally two libraries that we could use for using Dash7 in WaDeD. I did not succed to compile Opentag. Files are missing, or Makefiles. And the code haven’t been touch since February 2012. So I’ll be sceptical about the utilisation of Opentag.

Otherwise I succeeded in compiling Wizzilab, after many installations needed, but well explained in the SDK. Wizzilab gives with the SDK a Radio Test. We will be soon able to do the first tests after receiving the JTAG-USB interface for the CC430, and the wizzilab kit.

About the architecture, we are focusing on the stone, and putting aside the zombie. The stone will have a usb port, with which we are going to power the stone, and through this same port, we are going to communicate with a computer or an android to send and receive messages. I’m just curious about one point that could be crucial, the USB-port on android is used to has a slave to charge his batteries. Could it be used has master, and powering a device ?

In the case of fixed stone, the one that will only transfer messages, we will use accumulators, for their simplicity to be changed. and their will be connected to the usb port. We also need to think about waterproof solutions.

But we really need to specify our RF protocol.

Thursday we will have a meeting with wizzilab. I think it will clarify if we can use dash7 and wizzilab for our project. I fear that we are going to have problems with Wizzilab license, because we can only use the SDK on the wizzimote.

One of the best solution, could be to take the schemas of the wizzimote, and make our own PCB based on the wizzimote with using the remain pins of the CC430 to communicate with a FRAM and a USB port.

I took a look at other solutions like using transceivers, or other processors with wireless solutions, like the STM32W which is supported by Opentag like the CC430 (according to the files). I also took a look at the Bluetooth 4.0 but Dash7 is still my favourite for our project, because of the incredible range and low comsuption.

 

About practicals, today we started to make our first PCB on Expedition PCB.

 

 

Hubert Lefevre

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