A blog in 2023?

Photo by Cristian Siallagan on Unsplash

I have written a couple of times about why correntedebole.com still exists.

It costs me a few hundred bucks every year. I could find some cheaper hosting, but I am comfortable with who I am right now, and I can also run some personal things over there that are not profoundly exposed. 

From time to time, I have to argue about this approach. These are the most common comments I get:

  • It is a waste of money.
  • There are dozens of spaces where you can write for free.
  • Having a personal blog does not make any sense in 2021, 2022, or 2023…

Yes, it costs me money to run the blog. I need hosting space and an SLL certificate. The point here is that it is my own space. I administer it, and I can run the software I like the most on it. 

Yes, there are dozens of spaces where I can write for free. LinkedIn, Facebook, Medium, and Twitter, just to name a few, where I republish what I write on Corrente Debole. 

There are big disadvantages to doing so:

  • Not in every place what I write is going to be mine. 
  • If they are free, they probably monetize my writings somehow. I am still fine with the current terms, but these terms may change over time.
  • I have to comply with the Terms and Conditions of the site where I write. I have never had issues with those, but again, those terms may change, and I want to be free to publish whatever I want.
  • Those free space may change their attitude towards users, and it is their absolute right to do so. Again, I want to be free. Look at what happened on Twitter in recent times.
  • Does it make sense to have a blog in 2023? The answer is definitely yes.

So, as far as I will have the money to keep Corrente Debole alive, it will continue to exist.

On being laid off

Photo by David Clode on Unsplash

Being laid off sucks. I have gone through it, and it definitely sucks.

You are being laid off even if you have successfully reached your goals.

I still remember every minute of that day as if it were today.

I remember the people around me not being able to look into my eyes as I walked away. The removal process had already begun in their minds.

I remember driving home with my card boxes, trying to figure out how to tell my significant one I no longer had a job. 

At least it was a human being telling me I was fired. If you consider a General Counsel a human being, he was a human.

I did not sleep that night, but I remember that I got out of bed thinking: “Well, your loss. I know what I am worth. Fuck you.” 

It was tough.

The news spread fast. After a couple of days, I started receiving offers from other companies. I decided to take six months off before thinking about my next move.

I understand how thousands of people feel when they are fired from big tech companies. The numbers are impressive. It is estimated that more than 107.000 people lost their job between 2022 and 2023. 12000 by Alphabet, 18.000 by Amazon, 3740 by Twitter, 9090 by Salesforce, 4100 by Cisco, 11000 by Meta, 10000 by Microsoft, and 3900 by IBM, to name a few. If you are strong enough, you can read the numbers here.

It is interesting to look at how these big tech companies laid off people. Some of them disabled physical access to the workplace, others just fired an e-mail, others held an all-hands meeting, and others locked out people from their work accounts or locked their company’s personal computer.

If you are going to fire thousands of people, is there a “correct” and “fair” way to do it? Every company I cited before has critical assets they need to protect when an employee is fired. Think about it multiplied by thousands.

No, there is no good way to do it.

It is also interesting to notice that while you are firing thousands of people, you are running an event with a concert from a celebrity, or you just announced a 10 billion dollar investment in another company.

Corporate inconsistency.

So, do companies have to have a soul? That is not the case. The distance between how companies represent themselves and how they really are is still abysmal. This is true for every company size.

There must be hundreds of managers that had to make a decision on who and when. Did it hurt? I don’t know. I have been there, and it is the most challenging thing I have ever managed. As I remember the day I was fired, I remember the day I fired someone. 

Being laid off sucks. 

What I can say to those people is to look ahead. I went through it, and it was not easy, but it was the only way.

If I can help any contacts, even with a friendly chat, do not hesitate to get in touch. 

WiFi is looking at you

Photo by Misha Feshchak on Unsplash

You can detect people’s location in an area with WiFi coverage since years ago. Retailers were looking at it to understand customers’ behavior in their stores. Triangulation over airwaves is not new.

I came across a research paper: Dense Pose From WiFi.

An interesting read.

The basic idea is to determine human pose using inexpensive hardware like WiFi routers.

Here’s what you can do:

Given three WiFi transmitters and three aligned receivers, we can detect and recover dense human pose correspondence in cluttered scenarios with multiple people.

The researcher states that they can do this with a couple of WiFi routers at around 60 US dollars. Interesting.

You can easily detect and monitor people’s behavior using video cameras. It is as cheap as the solution documented by Carnegie Mellon University researchers. The main difference is those video cameras come with more significant privacy problems. People can be identified and tracked over time. Something, I guess, is intended.

The WiFi solution can be considered much more privacy aware than video cameras.

While I was reading the paper, I was impressed by the result. Just look at the pictures in the document to understand the potentiality.

I am impressed by what you can achieve using inexpensive hardware and open-source software. If you have the knowledge, you can build advanced systems that, a few years ago, were available only to big companies and government agencies. 

This is really exciting to me. 

Here’s the link to the original document: Dense Pose From WiFi

Debugging Streamlit with PyCharm

Photo by path digital on Unsplash

Streamlit is a Python package that allows you to build beautiful dashboards from Python without the need for a deep knowledge of front-end development. This is my case. I have never been interested that much in front-end development. I was, and I am a backend developer type.
Since I am playing with different data coming from our systems, I found Streamlit incredibly useful for organizing and visualizing the data I collect. You can run your dashboard locally and deploy it in the cloud when you need to share it with others in your organization.
I love PyCharm, which I use for my Python development.
As for every application, you need some debugging to ensure you are doing the right thing.
When you develop locally, you run a local Streamlit, dedicated web server. How can you debug my script in PyCharm?
I spent some time thinking about it and found a solution that may be helpful to other people out there. This will work in Visual Studio Code as well, but I didn’t try it since I don’t love Visual Studio Code so much.
You can add a Run/Debug configuration to PyCharm like the one you see below:

PyCharm – Add Run/Debug Configuration

Now you can set your breakpoints in the script and debug it as you usually do in PyCharm.

Home Assistant and NFC Tags

Source: Wikimedia Commons

I am experimenting with NFC Tags and automation on Home Assistant. I have bought a few writeable NFC tags for these experiments. They are cheap, but I wouldn’t say I like wasting them while testing.

Since Flipper Zero can simulate NFC tags, I decided to use it for my tests.

If you want to do the same, here is what you need to do.

Flipper Zero stores NFC Tag data in a plain text file with a .nfc extension. There is a simple command line python script that allows you to write an NFC tag in the Flipper Zero format. Thank you to evilpete for making this available.

#!/usr/bin/env python """     Generates NFC with URL address data and outputs Flipper NFC "save" file     this is a 5 min hack, No Guarantees      ./nfc_gen_url.py https://youtu.be/dQw4w9WgXcQ "Rick Roll" > rickroll.nfc      requires ndeflib      Written By: Peter Shipley github.com/evilpete      From pkg https://github.com/evilpete/flipper_toolbox """  import sys  try:     import ndef except ImportError as e:     print("Failed to import ndef")     print("https://github.com/nfcpy/ndeflib")     sys.exit(0)  # make sure output is utf-8 sys.stdout.reconfigure(encoding='utf-8')  # for debuging verbose = 0  nfc_header = """Filetype: Flipper NFC device Version: 2 # generated with flipper_toolbox Device type: NTAG215 # UID, ATQA and SAK are common for all formats UID: 04 10 56 01 74 48 03 ATQA: 44 00 SAK: 00 # Mifare Ultralight specific data Signature: A5 80 A4 CC A0 C3 A1 F6 8B BE 6F EE 83 A6 B9 EE 36 F8 FB C8 14 5A 23 AA 29 DB 78 56 07 B9 6B 92 Mifare version: 00 04 04 02 01 00 11 03 Counter 0: 0 Tearing 0: 00 Counter 1: 0 Tearing 1: 00 Counter 2: 0 Tearing 2: 00 Pages total: 135 """  data_static = [     0x04, 0x10, 0x56, 0xCA,     # 01 serial number     0x01, 0x74, 0x48, 0x03,     # 02 serial number     0x3E, 0x48, 0x00, 0x00,     # 03 serial number, internal, lock bytes, lock bytes     0xE1, 0x10, 0x3E, 0x00,     # 04 Capability Container ]  conf_pages = [     0x00, 0x00, 0x00, 0xBD,      # 130     0x04, 0x00, 0x00, 0xFF,      # 131     0x00, 0x05, 0x00, 0x00,      # 132     0x00, 0x00, 0x00, 0x00,      # 133     0x00, 0x00, 0x00, 0x00,      # 134 ]   def print_nfc_sub(t_data, file=sys.stdout):      print(nfc_header, end='', file=file)      p = 0     for x in range(0, 540, 4):         print(f"Page {p}: {t_data[x]:02X} {t_data[x + 1]:02X} "               f"{t_data[x + 2]:02X} {t_data[x + 3]:02X}", file=file)         p = p + 1   def gen_nfc_sub(tag_data):      tag_message = []     data_list = []      for x in tag_data:         if x[0] == 'txt':             tag_message.append(ndef.TextRecord(x[1], "en"))         elif x[0] == 'url':             tag_message.append(ndef.UriRecord(x[1]))          if verbose:             print(x, file=sys.stderr)             print(tag_message[-1:], file=sys.stderr)      buf = b"".join((ndef.message_encoder(tag_message)))      m_len = len(buf)      if verbose:         print("buf", m_len, hex(m_len), buf, file=sys.stderr)      data_list.extend(data_static)     data_list.append(3)         # Message Flags     if m_len < 255:         data_list.append(m_len)         # Type Length     else:         data_list.append(0xFF)         lenStr = hex(m_len)[2:].rjust(4, "0")         data_list.append(int(lenStr[0:2], 16))         data_list.append(int(lenStr[2:4], 16))     data_list.extend(list(buf))      data_list.append(0xFE)      # end of Data      data_len = len(data_list)      if verbose:         print("data_list", data_len, data_list, file=sys.stderr)      x = 520 - data_len     data_list.extend([0] * x)     data_list.extend(conf_pages)      return data_list   # url_str = "https://youtu.be/dQw4w9WgXcQ" # title_str = "Rick Roll"  if __name__ == '__main__':      arg_data = []      for a in sys.argv[1:]:         if a.startswith("http"):             arg_data.append(("url", a))         else:             arg_data.append(("txt", a))      if not arg_data:         print("requires at least one URL argument\n"               "Please provide URL and optional Title\n\n"               f"{sys.argv[0]} : https://some.url  'Title'")         sys.exit()      nfc_data = gen_nfc_sub(arg_data)      print_nfc_sub(nfc_data)      sys.exit()  

Copy the script on your computer (e.g. nfcdata.py) and run it:

python3 nfcdata.py "Test data" 

This will create a file that you can upload to your Flipper Zero using the qFlipper desktop application.

You will now be able to emulate the tag on the Flipper Zero.


Photo by John Barkiple on Unsplash

I am working on a personal project that uses python as the primary programming language. I am definitely in love with Python. Coming from an extensive experience with C, I am very comfortable using it, allowing me to dig into OOP when doing it.

I can use dozen of libraries that make my life easier. Salesforce, Harvest, and Google are easily accessible from any application. For this specific project, I have to deal with Pandas, Numpy and Plotly. I had never used them before.

I confess that everything is new and, sometimes, confusing. 

The documentation for these libraries is humongous, and I thought I could not read it all before starting to write my code. 

The feeling that everything is much more complex than before is overwhelming. Thirty years ago, there was little around programming languages and libraries. Better said, there was a lot, but much less than nowadays. 

You had to be careful about scarce resources. Today the computer I am using to write this post is hugely more powerful than any server I used to work on. I can easily waste resources without running out of them. My programming life is more straightforward.

On the other side, the complexity is increased. You have dozen of options to solve any problem you are facing. I always try to understand what I am doing, but I confess sometimes I Copy and Paste the snippet I need to solve a specific problem. 

I feel guilty when I do that.

Nevertheless, I wanted to complete the task I was working on and see it fast and dirty. I will make it elegant, concise, and unique later on. Truth said, it never happens.

If it works, it will stay the same forever.

Adventures in digital transformation

Photo by CHUTTERSNAP on Unsplash

My car insurance expires on the first of January. I always just remembered that I needed to renew it when I received an email from the insurance company telling me I was late.

My insurance company is one of the most prominent Italian companies. It is supposed to be among the most innovative in its specific field.

That’s not the case.

As soon as it was available, I installed the company mobile application guessing it would have made my life easier. I registered on the website, logged in on the application with my credentials, and completely forgot it (i.e., I never opened it after my first login.)

I thought the application would be smart enough to alert me that my insurance was about to expire. It wasn’t. I had to rely on the email message received from the insurance broker.

I thought I would have been able to renew my insurance from the application. No, I couldn’t. No online payment options were available in the application.

I phoned the insurance broker to ask him to send me the amount due and the payment details via email. They were kind to me, but I did not receive any email messages.

I sent an email asking for the same information. They have yet to reply.

End of the story: I drove to the insurance broker’s office and paid my renewal. Lucky me, they accept credit cards.

It’s 2023, and digital transformation is not happening. As we say in Italian: lo stai facendo male.


Photo by Markus Winkler on Unsplash

I wrote yesterday about my coding during these holidays. Everything is working as expected and pretty smoothly. There is a vast space for optimization, but I am okay with it for the time being.

Today, I looked at my code before committing it to my private repository. I was not happy. Parsing an Excel file row by row and validating every single column is a stupid exercise. At least, it is a silly exercise for me.

After ingesting the data, I played with my database using pandas and Numpy. Great tools, by the way.

And then I realized how bad I was when I was writing that code.

I realized I should have used pandas from the very beginning. 

Something like 500 hundred lines of code turned into 30 lines or so.

I’m getting too old for this, I guess.

Annus horribilis

Photo by Kelly Sikkema on Unsplash

I can’t tell you how happy I am 2022 is over.

Ok, this is my usual “end-of-year rant,” continue at your own risk. 

I look back at what it was meant to be, and I must admit it has been a complete failure. All of my plans went south as soon as February started.

No matter what I did to follow my designed path, external influences have taken me personally and professionally elsewhere.

The truth is that you can’t program everything, even though you want to. 

I will not fail into this mistake again.

Nevertheless, there are some lessons that I have learned along the journey:

  • Uncertainty is the new constant. The pandemic, the war, the rising inflation, and the energy crisis are something no one expected, and the result is that every decision taken may change the next day.
  • Everything became more complicated. Every single process out there has been designed by an insane bureaucrat. No matter what you do, you have to fight hard.
  • Many people find refuge in an Oz World and want you to think you are part of the same world. Trying to escape the uncertainty, they built their private world with their rules.
  • A lot of business decisions are made in a very conservative way. People tend to stay on the safe side or, even worse, decide the best way to please their boss.
  • I need to redesign my habits to be more consistent. Think more and act more—no impulse decisions.
  • Distance is a huge problem. I tend to stay away from people much more than before, and that’s wrong.
  • Nobody is listening, and everybody is talking. Me too.
  • In a more general way, there is less beauty out there than before. 
  • There is a dystonic approach to business planning. Everybody wants to grow without considering the impact on people, society, and the world. Not to talk about the strange idea of growing without considering the potential effect of all external factors.
  • I need to care for myself. This year has been terrible from a physical perspective. I am not young anymore, and I should consider that. 
  • From a business perspective, it has been an incredibly tough year. There is an incredible amount of things that need to be fixed to be able to continue our journey. This is the biggest challenge for the following year.

Those issues will remain in 2023. The good news is that I am aware of them and will act accordingly.

It looks like there has been a lot of negativity in 2022, but I have to admit I have to save something:

  • I have spent valuable time with incredibly talented people. I have learned a lot. 
  • I read a lot, much more than in my entire life.
  • I enjoyed my personal hobbies more than before. Coding, guitar, and magic have significantly improved and helped me understand what was happening around me.
  • I loved spending time with my significant one. Definitely a big change.
  • I have spent less money on things and have been able to manage my money more effectively.
  • I have learned to let things go. 

No, I do not have a new year’s resolution list. It never worked for me; it is just wishful thinking. 

The strange world of coding

Photo by Priscilla Du Preez on Unsplash

The good news is that I am still on holiday. These days I am playing with some python code to read data from some of our systems and perform some analysis before the new fiscal year officially starts.

It started as a small project and a relaxing activity. It was not strictly work; I was playing with data and python. I love coding, and I always do something when I have some free time.

I ended up with five thousand lines of code.

This specific exercise was an ETL (Extract, Transform, Load). Two main systems were involved: Salesforce and Google Drive. I wanted everything on a Sqlite database to wrangle data with pandas and NumPy. 

Extracting data was easy. Both Salesforce and Google Drive have very well-documented APIs. The transformation was tricky. Every system has its way of representing data. Specifically, date and time management is always a massive pain between different systems. The load was a breeze.

Finally, I made it. My database was loaded with data.

I ran the tests against data integrity, and something was wrong. After a SQL join, I expected 3036 rows and got 3108. It took me an hour to find the culprits: I forgot to disallow duplicates in a database field, and there was duplicated data in Google Drive.

I could have deleted the duplicated data in Google Drive, but I did not want to do it. I am not the only one accessing and using that data.

I modified my code to cope with duplicated data. Well, it almost doubled the size of my codebase. I could not simply discard the duplicate. I had to merge the data in a table with 32 different fields. Each field with specific requirements.

It was exciting and intriguing.

Sometimes you spend more time coding edge case management than the core application logic.

You need an account!

Photo by Gabriel Heinzer on Unsplash

As I said a few months ago, a lot of software is moving to subscription models. Many of these applications offer a free tier with more or less advanced functionality. If you want more, you need a subscription and have to pay for it. I’m not too fond of this, honestly.

Nevertheless, I am always in the mood to try new applications, especially if they are applications for developers or system administrators.

I am a long-time user of if they are applications for developers or system administrators.

I am a long-time user of iTerm2 on my Mac. The combination of iTerm, tmux, zsh, and powerlevel10k are the best for most of my use cases.

I always try new terminals, but I go back to iTerm.

Yesterday I was trying the last one I heard of. No, I will not name it because it does add much to what I am writing. I headed to the developer’s website, downloaded the application, and installed it.

When I opened it, it asked me to create an account on the developer website. There is no way to use the application without a user account on their system.


Come on, folks. It’s a terminal. Why should I need an account to use a terminal application?

We have gone a little bit too far.

In the last few years, I have limited my accounts around the web to what I need. It is a pain to see that the world out there is moving in another direction.

OK, back to iTerm, then.

My book is not mine

Photo by @felipepelaquim on Unsplash

If I walk into a bookstore and buy a book, I will leave the store with the book, which will be mine forever. I can read it, lend it to other people, resell it, or give it as a gift. 

It’s mine, forever.

I am a happy user of a Kindle Paperwhite. I love that device. I have purchased something like two thousand books over the years.

Well, non of those books is mine. I paid for them. Sometimes I pay less than for a physical book. Sometimes less. Nevertheless, I spent. 

If you read carefully (who does?), the Kindle Store Terms of Use you will read this:

Use of Kindle Content. Upon your download or access of Kindle Content and payment of any applicable fees (including applicable taxes), the Content Provider grants you a non-exclusive right to view, use, and display such Kindle Content (for Subscription Content, only as long as you remain an active member of the underlying membership or subscription program), solely through Kindle Software or as otherwise permitted as part of the Service, solely on the number of Supported Devices specified in the Kindle Store, and solely for your personal, non-commercial use. Kindle Content is licensed, not sold, to you by the Content Provider. The Content Provider may include additional terms for use within its Kindle Content. Those terms will also apply, but this Agreement will govern in the event of a conflict. Some Kindle Content, such as interactive or highly formatted content, may not be available to you on all Kindle Software.

Limitations. Unless specifically indicated otherwise, you may not sell, rent, lease, distribute, broadcast, sublicense, or otherwise assign any rights to the Kindle Content or any portion of it to any third party, and you may not remove or modify any proprietary notices or labels on the Kindle Content. In addition, you may not attempt to bypass, modify, defeat, or otherwise circumvent any digital rights management system or other content protection or features used as part of the Service.

I don’t own the book. I own the right to read it, as far as I am an Amazon customer and a Kindle user.

Bad days, a recipe.

Photo by Agê Barros on Unsplash

There are bad days, and they usually start early in the morning. You wake up and head to the shower, jump into it, and suddenly realize that your shower gel is over. You start brewing your morning coffee and spill it on your immaculate newspaper. You know the feeling.

You already know your day will be a complete mess from that moment. You know there’s nothing you can do to recover. You only have to go through it and try to limit damages.

Your call with a client doesn’t go as expected. You move to the next task and realize you are missing critical data to complete it.

Over the years, I have developed my personal solution for these days. 

I move to the room I like the most, my studio. I put on my preferred playlist and take a break from everything. I usually start doing something totally unrelated to the specific needs of the day. 

I shut down every notification from every device in the room.

My idea is to create a safe environment for my mind to survive a messy day. It is a sort of escape from the reality I am living in at that specific moment. Focusing on something I like lets all the problems fly away and reconcile me with the universe surrounding me.

After half an hour, I am ready to return to my duties with a clear and positive mind.

And then the phone rings.

No way, it will be one of those days, no matter what you do.

John Carmack is leaving Meta

Photo by Dima Solomin on Unsplash

John Carmack has left meta to focus on his AI startup.

You have missed something if you don’t know John Carmack and work in the software industry.

In an internal memo that leaked, John writes:

We have a ridiculous amount of people and resources, but we constantly self-sabotage and squander effort. There is no way to sugar coat this; I think our organization is operating at half the effectiveness that would make me happy.

This statement made me think. Isn’t this true for most organizations today?

Another interesting statement:

It has been a struggle for me. I have a voice at the highest levels here, so it feels like I should be able to move things, but I’m evidently not persuasive enough. A good fraction of the things I complain about eventually turn my way after a year or two passes and evidence piles up, but I have never been able to kill stupid things before they cause damage, or set a direction and have a team actually stick to it. I think my influence at the margins has been positive, but it has never been a prime mover.

This is extremely valuable.

The birth of a dictatorship

Photo by Pro Church Media on Unsplash

I have been a massive fan of Twitter from the very beginning. I joined the platform on December 2006 after I failed to ink a deal with Jaiku (who remembers that?) a few weeks before Google acquired them. Huge loss on H3G. Those were times.

Over the years, my interest in Twitter started to fade. The signal/noise became too low for my taste. I have a look at the streams a couple of times every month.

Nevertheless, the Twitter saga is quite intriguing these days. Musk is buying it; Musk is not buying it; Musk is firing people; Musk is re-hiring people; Musk is selling Twitter furniture and other paraphernalia… You know the story.

Looking at what’s happening, I ended up thinking that we are assisting the birth of a dictatorship, and that’s quite amusing. A dictatorship that was not born from a coupe but from a massive amount of dollars. Fascinating.

Honest? I wouldn’t say I like Musk much. I am aware I am killing my option to work for him by saying that, but the point is that I would never want to work for someone like Musk.

In Twitter’s rising dictatorship, he is the dictator. I have never worked for a dictator, but it will not be fun. Every morning you will wonder what mood the dictator woke up in, and depending on the mood you cannot control, your future could take a positive or a negative turn. No, not fun.

Every Twitter employee is at Musk’s mercy, as are all his users. You can be an employee today; ten minutes later, you can’t. At the same time, you can write on the platform as a user, even a paying one, but three minutes later, you could be thrown out the door without knowing why.

Dictatorship and dictator are appropriate words to use in this case.