Peter Farley

Recently, I’ve come into possession of a decent quantity of several microcontrollers.

Well, it’s been over two years from the last post, but I guess better late than never.

A while back I installed a GPS-disciplined PTP (Precision Time Protocol) time server at home.

Finally I’ve come to the most complex part of the Sigfox (ignoring the standard PC motherboard) - the SDR (Software Defined Radio).

As I’ve been working on reverse-engineering the SDR module from the Sigfox base station, I also wanted to dump any ROMs from the device.

Before moving on to the more complex SDR module, I decided to take a look at the external LNA (low noise amplifier) first.

Now that I’ve given an overview of the Sigfox base station, I’ll start diving deeper into the individual components.

Over a year ago I obtained a Sigfox base station, or TAP (Transfox Access Point), from a company that was moving and wanted to get rid of some of their old equipment.

GitHub repo containing the PCBs and 3D models in this post: https://git.pfarley.dev/pfarley/tek-tla-probes

Back in 2015, Linux deprecated the /sys/class/gpio interface in favor of using other methods to access GPIO pins.

This is a project that I started a bit over a year ago, though which is still in progress at the time of writing.

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