#RS232

[commodorez]

Comparing various 3rd party RS232 adapters for Commodore computers. From left to right:

Commodore S232 Adapter by Jameco for VIC-20/C64/C128

Link232 v1.2 by Brain Innovations for C64/C128

Dual Serial Cart Mk I by me for VIC-20

[icgoodfind]

Analog Devices #ADE7758ARWZ #IS62C256AL-45ULI-TR #ISSI DRAM #MAX232CSE+T #MAXIM #RS232 #chip #integrated circuit #ICGOODFIND Email and Skype: sales@icgoodfind.com www.icgoodfind.com

[lolsexonthebeach]

[bitstream24]

ESP32 Serial Ports - UART0, UART1, UART2 Access Using the Arduino IDE

The ESP32 has three UART interfaces: UART0, UART1, and UART2. They provide asynchronous, bidirectional communication at up to five Mbps. You can establish serial protocols using the appropriate breakout boards, such as RS232, RS422, RS485, USB, and more.

[assignedcatboyatcheckout]

I decided to take a look at that adapter.

Now despite how much I would have liked to insert a wiring diagram, I don't know much about circuitry despite tinkering with it as a child. So images are all you're getting.

A Nexperia 74HC132D Quad 2-input NAND Schmitt trigger chip.

A Texas Instruments LM2937 500-mA Low Dropout Regulator.

And a Maxim Instruments MAX3232 Multichannel RS-232 Line Driver and Receiver, along with a Maxim MAX3491E RS-485/RS-422 Transceivers.

Just based off the chips' positions alone all this adapter seems to be doing is converting RS485 into RS232 and vice versa.

So I have a few electronic marquee signs laying around, I know more now that I did then, lets see if I can get it working

[casecomms]

Transforming Legacy Connectivity: The Power of RS232 to Ethernet Converters

In a rapidly evolving digital landscape, legacy systems need a modern touch. Case Communications' RS232 to Ethernet Converters breathe new life into outdated RS232 connections, enabling seamless integration with contemporary networks. These converters transform traditional serial data into Ethernet signals, ensuring reliable and fast communication across diverse applications. Whether it's industrial automation or point-of-sale systems, this innovative solution bridges the gap between old and new technologies, enhancing efficiency and performance. Embrace the future while preserving the past with Case Communications' cutting-edge RS232 to Ethernet Converter. Visit at https://factofit.com/transforming-legacy-connectivity-the-power-of-rs232-to-ethernet-converters/

[stumblngrumbl]

yeah it's fun to say "they're bricked" but a bricked computer is as responsive as a brick - like, nothing happens. no BSOD. just. nothing.

a crowdstruck computer still tries to boot (note: a brick does not try to boot. it just sits there utterly nonresponsive), it just fails to. you can interrupt the booting process, go to safe mode (how to get to safe mode varies by windows version and idk how to do a modern windows without looking it up because i don't do windows no mo)...

but to go to safe mode, you have to physically be at the computer. the notion is that physical access is the last bastion of security; the only way to seriously mess with a computer that's not otherwise compromised is via direct contact.

this means you can't do it over the network...

idk if people on tumblr know about this but a cybersecurity software called crowdstrike just did what is probably the single biggest fuck up in any sector in the past 10 years. it's monumentally bad. literally the most horror-inducing nightmare scenario for a tech company.

some info, crowdstrike is essentially an antivirus software for enterprises. which means normal laypeople cant really get it, they're for businesses and organisations and important stuff.

so, on a friday evening (it of course wasnt friday everywhere but it was friday evening in oceania which is where it first started causing damage due to europe and na being asleep), crowdstrike pushed out an update to their windows users that caused a bug.

before i get into what the bug is, know that friday evening is the worst possible time to do this because people are going home. the weekend is starting. offices dont have people in them. this is just one of many perfectly placed failures in the rube goldburg machine of crowdstrike. there's a reason friday is called 'dont push to live friday' or more to the point 'dont fuck it up friday'

so, at 3pm at friday, an update comes rolling into crowdstrike users which is automatically implemented. this update immediately causes the computer to blue screen of death. very very bad. but it's not simply a 'you need to restart' crash, because the computer then gets stuck into a boot loop.

this is the worst possible thing because, in a boot loop state, a computer is never really able to get to a point where it can do anything. like download a fix. so there is nothing crowdstrike can do to remedy this death update anymore. it is now left to the end users.

it was pretty quickly identified what the problem was. you had to boot it in safe mode, and a very small file needed to be deleted. or you could just rename crowdstrike to something else so windows never attempts to use it.

it's a fairly easy fix in the grand scheme of things, but the issue is that it is effecting enterprises. which can have a looooot of computers. in many different locations. so an IT person would need to manually fix hundreds of computers, sometimes in whole other cities and perhaps even other countries if theyre big enough.

another fuck up crowdstrike did was they did not stagger the update, so they could catch any mistakes before they wrecked havoc. (and also how how HOW do you not catch this before deploying it. this isn't a code oopsie this is a complete failure of quality ensurance that probably permeates the whole company to not realise their update was an instant kill). they rolled it out to everyone of their clients in the world at the same time.

and this seems pretty hilarious on the surface. i was havin a good chuckle as eftpos went down in the store i was working at, chaos was definitely ensuring lmao. im in aus, and banking was literally down nationwide.

but then you start hearing about the entire country's planes being grounded because the airport's computers are bricked. and hospitals having no computers anymore. emergency call centres crashing. and you realised that, wow. crowdstrike just killed people probably. this is literally the worst thing possible for a company like this to do.

crowdstrike was kinda on the come up too, they were starting to become a big name in the tech world as a new face. but that has definitely vanished now. to fuck up at this many places, is almost extremely impressive. its hard to even think of a comparable fuckup.

a friday evening simultaneous rollout boot loop is a phrase that haunts IT people in their darkest hours. it's the monster that drags people down into the swamp. it's the big bag in the horror movie. it's the end of the road. and for crowdstrike, that reaper of souls just knocked on their doorstep.

[electrical-electronicsworld]

Siemens S7 400 RS232 Communication card.

[icgoodfind]

Texas Instruments NXP #74HC4053D #NXP #MAX232ESE #MAXIM RS485 RS232 #LM324DR #chip #ICGOODFIND #electronic components #circuit design Email or Skype: sales@icgoodfind.com www.icgoodfind.com

[smallercommand]

Some of the cloud-requiring devices can be cloudcut/flashed, but that is by necessity, a moving target very similar to the ongoing ublock/youtube action. For the rest, yes, a standardized communication port would be nice, but oh god please make it USB and not rs-232. The genderfuckery and literal crossed wires make me cry, and it's going into a USB adapter anyway.

[rbrtw2ritz]

https://www.futureelectronics.com/p/semiconductors--signal-interface--rs-232/icl3221eivz-t-renesas-9034756

RS 232 cable, RS 232 voltage, Wireless USB, rs232 cable types

ICL3221 Series 250 kbps 15 kV RS232 5.5V Transmitter/Receiver - TSSOP-16

[bigmagazineengineer]

Enhance Connectivity with RS232 Gateway.

Unlock seamless data communication and control with HashStudioz’s RS232 gateway. Connect legacy devices to modern systems effortlessly. Explore now!

[guangyaw]

透過 PuTTY 進行嵌入式系統除錯

之前介紹過使用 minicom 作為嵌入式系統的除錯工具， 這套軟體通常是在 Ubuntu 系統中來使用， 今天則是要介紹一套在 Windows也能使用 透過 PuTTY 進行嵌入式系統除錯 嵌入式系統運用的範圍很廣泛， 舉凡從監視器、數位電視、車用電子等， 都有參一腳， 開發過程中使用除錯板協助找出問題， 應該是軟體開發中重要的一個環節。 PuTTY 是一套開源的工具軟體， 支援多種網路協定，包括SCP，SSH，Telnet等， 此次就透過 PuTTY 來進行除錯 安裝完畢並開啟 PuTTY 就能看到如上圖的畫面， 由於嵌入式系統通常以 USB to RS232 連接除錯板， 此處在連線的類型 (connection type) 選擇 Serial ， 並選擇連接埠的埠號 (可從系統的裝置管理員看到)， 連接的速率通常為 9600 或者 115200…

[jrvis2levyy]

What is a rs-232, RS232 to rs422 converter, rs232 to ethernet, serial communications connecting devices

ICL3221 Series 250 kbps 15 kV RS232 5.5V Transmitter/Receiver - TSSOP-16

[gelecekbt1]

CAN BUS Haberleşme Çözümleri - GelecekBT