The TD1204 is the GPS & Accelerometer version of the sigfox Telecom Design chip. After a previous post about the use of the accelerometers (here) I’m describing how to use the GPS module.
The embedded GPS is based on a UBX G7020 chip. This chip will give you the date, time, longitude, latitude, altitude, speed and direction of the device when activated.
Read more for programming details
The Telecom Design TD 1204, used on Sigfox network have a builtin 3 axis accelerometer and a lack of documentation as usual… By the way, here is the result of my searches to make it work.
Basically, the provided libraries makes it easy to use, in the setup part you have to initialize the accelerometers and in the main loop you have to run a TD_ACCELERO_Process(); method to monitor the IRQ and call your callback function to read the data.
It means that the accelerometers is not automatically waking up the device but managed during the 32KHz wakeup look.
The next part is detailing how to use it.
This post is mostly a remember for myself … The formula to get the right antenna size is the following one.
Wavelengh = 300 / FmHz
As an example 300 / 868Mhz = 0,345 m
Then the antenna will be 1/2 wave = 17,28cm or 1/4 wave = 8,64cm
Square is a template you can find on themeforest for 19$ for a single site and for a non profit website. It contains angular, twitter bootstrap and other package already configured to make your project quickly operational.
This post is detailing some way to use it. You won’t find everything but the points I had to search longer before finding a solution. Hope it will help
I spent some time playing with angular.js directives and try to understand what option you should not forget to make it works, this is detailing the result of these search.
I just finished a program started a couple of month ago. When I stared to it, I had a hard work to find how to sample a group of 256 values at 32Khz with the EFM32 device embedded in the Telecom Design TD1204 / TD1208 used for my SigFox project. This post details how to do this task
I had to work a little bit on an audio solution to get sound samples using a micro-controler. I based my design on an Internet really known circuit but I had to optimize it a little bit to be more efficient in terms of energy. This post is giving the result of my hack.
To go angular.js on Mac Os X from scratch, you need to do a couple of installation task ; After spending a full afternoon I can tell you it is not as easy as on Linux but now it works. Hope these line will help you to fire it in less than 15 minutes.