End of week — pin planner

This week was quite busy to complete my assignments for the FPGA Course. I was running out of time because I did not estimate properly my available free time and things got crowded at the office, at this end of week. With a lot to do there, I barely found any time to focus on …


FPGA Course

I’ve been quite busy lately and neglected the blog. I enrolled on Coursera for a very interesting FPGA course, in what seems to be a FPGA specialization from University of Colorado Boulder. I have always had somewhat a reserved attitude towards FPGAs mainly because I believed that these are hard to understand and need a …


Error opening serial port

Encouraged by the latest developments, today I started building a new application that will  allow remote connection to Kenwood TH-D74, remote control and APRS data transfer. However, while building and running the app I got the following error: If you encounter this, be aware that it is generated by application sandboxing. You can think of using …


BLE or “Bluetooth Low Energy”

Struggling to understand how Universal Unique IDs work (see here) I was wrongly assuming that Core Bluetooth is a framework from Apple that covers all aspects of communication with devices via BT. I was WRONG ! scanForPeripheralsWithServices method and, in general, what I tried to do, for almost a week, is NOT good for my intended …


Using UUIDs and Bluetooth

I did some more steps towards accessing Kenwood TH-D74’s services via bluetooth. I struggled for some time understanding how discovery based on UUIDs work. I was not aware that, for each service profile, there is a standard Universally Unique Identifier (UUID) documented in Bluetooth SIG specs. Specifically for Serial Port Profile (SPP) service, the UUID …


Why unsupported central manager state ?

Several days ago I received a Kenwood TH D74 portable transceiver. Although I have a Yaesu FT60 and some other smaller and unimportant transceivers, I don’t have any transceiver that is APRS capable. What’s more important, this transceiver is BT and USB capable, providing serial communication, which opens some interesting opportunities. Today I opened XCode …


Kenwood TH-D74

We first met — I think — in the summer of 2015 during the Hamfest in Friedrichshafen. At that time I had a mobile Kenwood transceiver TM-D710 which was quite nice by its own. However, after several months using the TM-D710 I got increasingly annoyed by some of its shortcomings, most of them purely subjective (but I …


Shelter for stray cats

Winter is finally here and the weather is suddenly much colder. I bought two styrofoam boxes, the types used for carrying fish, and I made two shelters for the stray cats. Hope will be warm and cosy. It just struck me that this is the 100 post I published on this blog. Nice. I have …


Disable iPhone automatic backup

My new iPhone X is beautiful, a bit too expensive for what it offers but… what the heck. It’s a nice toy. Fancy one. Yet, something annoys me each time I sync my phone with the iTunes. I do this mostly for syncing music from my library. Each time I press the sync button, a …


Abandoned Posts

Over the past seven years (the age of this blog) I started writing several articles that I never  finished. It’s time to trash them completely or just add them to a list for future afterthoughts. Who knows ? So, from older to newer: “Weller WD 1000 M Review – Part III – Software”, January 18, 2013 — …