The God of Coding, Becoming an IT Conglomerate

53. communication

RFID (Radio-Frequency Identification) refers to a technology that recognizes information at a distance using radio waves.

Among them, Hoyoung focused on NFC technology.

NFC is an abbreviation of Near Field Communication, which refers to short-distance wireless communication, and was one of the technologies derived from RFID.

“Let’s see, NFC was originally created around 2003… It’s a question of ideas, but I can make it with the current technology.”

NFC was created long after RFID technology was developed, because the need for this technology was not properly recognized before that.

Hoyoung smiled.

“If you make NFC first, then I can patent this too.”

Hoyoung wandered around the electronics store with a light heart.

In NFC technology, there is a peer-to-peer (P2P) mode.

This mode allows data to be transmitted and received between NFC devices.

Although data transmission and reception is possible only within a very small range within 20 cm, the speed is unimaginably slow.

However, Hoyoung thought that even that was a sense of virtue.

However, RFID-related items were not easily obtainable.

Ho-yeong visited telecommunication-related companies one by one to find out if there was a place that sold transmitters and receivers.

Fortunately, it was only possible to find one set.

Gaia had a built-in NFC transceiver.

All smartphones and smartwatches from the late 2010s came equipped with NFC as standard, so it was natural in a way.

‘Current laptops don’t have USB, of course. If so, eventually data must be transmitted through the serial port. Then, first, one program to transmit data from the computer to the serial port, and another program to transmit data from the serial port to the RFID transmitter through the cable.’

He was constantly thinking about ways he could use RFID technology while walking around the electronics store.

Fortunately, Hoyoung was no different from an expert on data transmission, so he decided that coding would not take too long if he set up an algorithm.

“Can’t find it here?”

No matter how many hours I searched, I couldn’t find an RFID transceiver.

Even if at least a transmitter and receiver in factory default state are not available, we tried to find a machine (transportation card receiver, or high pass) that applied RFID, but it was not easy to obtain because the technology was not yet widely used.

The employee asked the manager of the commercial building where he had taken the card and entered if there was a place where he could get an RFID card receiver, but the only answer he got back was that he didn’t know.

When you are about to give up today without being able to do it.

“uh···?”

At that time, Hoyoung was able to find a disparate store in a corner of the Akihabara Electric Town.

No special name on the sign

[Livestock equipment]

It was just written.

“Perhaps?”

Hoyoung suddenly remembered a story he had heard somewhere and entered a livestock equipment store.

Inside, which is wider than expected, various livestock-related machines were displayed.

From watering machines and livestock sprayers to excrement processing machines…

However, these were not the things Hoyoung was looking for.

Hoyoung, who was browsing every nook and cranny of the store, found something and burst into laughter with joy.

“haha! I was wondering if it really exists!”

The object Hoyoung found was a kind of tag attached to the cow’s ears to make it easier to manage beef cattle.

And this tag was a device using RFID.

“If you have this tag here, it means you have a receiver. Also!”

And I was able to find the receiver right next to it.

Hoyoung was happy and bought three sets of transceivers on the display stand.

I wanted to buy a few more just in case, but unfortunately there were no more in stock.

Hoyoung bought a serial port at an electronics store before returning to the hotel.

I stopped at hardware stores and radio stores to buy screwdrivers, copper wire, and other items I needed.

When they returned to the hotel, Kim Joo-jung did not return to the hotel room as if she was still doing errands.

Hoyoung took his laptop and went straight down to the lobby.

“Excuse me. Are there any rooms left?”

“yes. Let me check in a moment.”

“Please find a room with a desk among the available rooms.”

“All right. please wait for a moment.”

The hotel staff kindly welcomed Hoyeong.

Hoyoung wanted to work freely all night, so he reserved another room.

Somehow, I couldn’t work freely where Kim Joo-jung was.

Because Gaia couldn’t be shown.

“Currently, there are a lot of reserved guests, so there are only suites left. Would that be okay?”

“yes. It doesn’t matter.”

“All right. You can go in right now. Please pay when checking out.”

“thank you. And if someone comes into room 1803, could you tell me a word?”

“yes. What would you like me to tell you?”

“I don’t think I will be able to come in today because something else happened, and I will be back by tomorrow morning at the latest. Please tell me that Yun Ho-young left it.”

“All right.”

Hoyoung took the suite key and went up to the hotel.

The suite was large and luxurious like a suite.

As soon as Hoyoung entered, he found a desk and unpacked his laptop and the equipment he had bought at the electronics store.

“haha. I’m great too.”

Hoyoung suddenly burst into laughter as he found himself in such a nice room, thinking only of work.

But what? that this is the happiest day.

.

Hoyoung, who entered the law department in Seoul, naturally always received excellent grades in middle and high school.

It was always one of the best ranks in the entire school, regardless of whether it was a mock test or a GPA.

However, if Hoyoung had to point out one weakness, he would say without hesitation that it was the ‘technical’ practical subject.

It was the same even when I got older.

Even after starting programming, Hoyoung felt unlimited freedom in the world of software, but was not interested in mechanical engineering.

I could barely even solder the board using ‘Arduino’, which is said to be the most basic.

“after···.”

After finishing one of the tasks, Hoyoung let out a breath he had been holding back.

The work completed a while ago was to connect the serial cable to the receiver removed from the RFID tag receiver for livestock farming.

It was a task that I failed once by diligently looking for the pinout of the serial cable through Gaia, and only completed it the second time.

“If I succeed here, I must leave it to the experts in Korea.”

Hoyoung muttered while looking at the modules that were sloppily attached with insulating tape, and now started coding.

Complex coding felt easier than simply cutting the cable, stripping the sheath, and attaching and soldering it to the receiver’s data module.

To him, coding was as natural as breathing and talking.

“Once the data transfer to the serial port is complete.”

Glancing at the clock, it was almost 1:00 in the morning.

“I can complete moving to the module in three hours.”

I already gave up thinking well today.

I thought I could sleep on the plane to Korea tomorrow.

Three hours later indeed.

Hoyoung reviewed the program he made slowly.

A bit crude program to make early.

If I had put a little more effort, I could have written more efficient and better code, but I wanted to test it as quickly as possible, so I decided not to worry about it for now.

“Come on, let’s do it.”

Hoyoung put batteries in the transmitter, took off the smartwatch from his wrist, and brought it close to the transmitter.

“Gaia. Activate NFC receiving mode.”

“yes. All right.”

And I ran the program I made a while ago on my laptop.

To-to-

After a few beeps, letters finally appeared on the laptop’s screen.

[Connected.]

“Good! Gaia, is it connected to the laptop via NFC?”

“yes. Connected.”

Hoyoung nodded happily.

He pondered over what data to hand over to Gaia, and then copied the source code of the data transfer program he had just made to Gaia.

The speed was literally atrocious.

A speed of about 200 kbps per second is an unimaginable speed in the future.

“Since the theoretical maximum speed of NFC communication is 424 kbps, if you use a better module and have a good communication environment, it can be twice as fast as now.”

“Reception complete. I will analyze the C language code you sent.”

After about 3 minutes passed, Gaia spoke again.

“As a result of code analysis, there were no errors or errors, but improvements were found in a total of 126 lines of code. Can I make amends?”

“Yes, please.”

After a while, Gaia displayed the code on the screen, correcting all the parts that Hoyeong skipped while making it in a hurry.

It was a perfect code that Hoyoung didn’t even have to read.

“Gaia, are you still carrying out your order to find out what happened on the day you first returned to the past two years ago?”

“yes. We are still allocating 20% of the CPU at all times.”

“result?”

“I have no income.”

“right? after-“

When Gaia said that he had not found out anything, Hoyoung let out a deep sigh and continued.

“Then let’s stop doing that. It just seems to waste CPU.”

“All right.”

Hoyoung thought that if he hadn’t been able to find out anything so far, he would never be able to find out anything in the future.

“Later, when about 20 years have passed and the Internet is overflowing with information, let’s look for it again then.”

“All right. 20 years later. I will reserve the execution of the current situation assessment order.”

“okay.”

Hoyoung thought that there was a great harvest just by successfully transmitting data to Gaia.

If it wasn’t for today’s incident, until the wireless Internet era comes, Gaia would have no choice but to use only a small part of her abilities.

“Gaia. I need to transmit the data you have through RFID. To do so, we need to write a program that allows the receiver to receive data through RFID and save data to the hard drive through the serial port. I didn’t sleep well today.”

Hoyoung groaned and started tapping the laptop again.

But his face was smiling wide.

It was already past 5 in the morning, but Hoyoung didn’t know he was tired.

For him, the fact that the program he planned and produced worked as well as he thought was like a medicine to recover from fatigue.

.

.

.

As soon as Hoyoung came to Korea, he visited Cheonggyecheon.

At that time, many stores such as electronics stores and tool stores were lined up in Cheonggyecheon.

In particular, there were many skilled mechanics who made various machines as ordered.

“It must be around here?”

Hoyoung went to a store with a map written by Lee Chanjin, a mechanical engineering nerd and mechanical engineering student who was recognized at school.

‘The boss here is the best in Korea. It’s a bit expensive though.’

Recalling Jin-chan’s words, Ho-young went to the map and found the store Jin-chan mentioned in the section leading to Euljiro 3-ga.

[Master’s House]

Hoyoung looked at the signboard and smiled.

It seemed that he was not usually confident that he wrote himself as a master craftsman.

“hello?”

When I opened the door and entered the store, I saw a middle-aged man in overalls.

Gray hair could be seen under the tightly wrapped hood.

It was the image of a craftsman who would appear as a stereotype in a movie or drama.

“What did you come for?”

“I came to request the production of a simple device.”

“Device?”

Hoyoung handed over the machine he had tested in Japan and the blueprint he had drawn.

“Hmm···. It’s a device I’ve never built before.”

“I heard that the teacher is the best in Korea. Do you know that Lee Jin-chan is?”

“Jin-chan? Are you referring to Seoul National University student Lee Jin-chan?”

Hoyoung looked at the man with eyes of surprise.

For some reason, I thought that such a character would say, ‘I can’t make it right now!’, but he was more gentle than I thought.

“yes. He is my senior at school and a colleague at work. I was introduced to you.”

“Right.”

The man nodded his head and took a closer look at the blueprints and the device Hoyoung had made.

“I can make it, but it seems a bit expensive?”

“How much will it cost?”

“One big one, assuming you get all the materials I’m talking about.”

Hoyoung tilted her head slightly.

“How much are you talking about a large one?”

“One million won.”

the man said firmly.

Seeing such a man, Hoyeong suppressed a laugh and said,

“It’s smaller than I thought.”

“yes?”

“Then how long will it take?”

“Give me two weeks.”

Hoyoung smiled and said.

“Then I will give you almost ten times as much as the boss thinks. Can you get the material and finish it within a week?”

“You mean 10 million won?”

Hoyoung nodded at the man who asked with a surprised expression.

“this···. Come in at once. I think we need to hear more about it.”

The man put his work on the ground and took off his gloves to guide Hoyeong inside.

There was something that Hoyeong felt the most in this life.

‘Money is not omnipotent, but it is one of the easiest tools to move people’s hearts.’

Didn’t someone do that?

If money can’t move people’s hearts, it’s because the amount is small.