Search for serial port in Topics

Serial Port Prototypes

Has anyone made a serial port interface? I would like to build a rpm meter using a serial port of my laptop. The schematic should be easy but I can not find any information on it. Any ideas? Thanks, Brian

Topic by bsamc2000    |  last reply

Serial port not found?

I tried to use my arduino today but COM3 couldn't be found. I tried it with older versions and other USB ports but it still didn't work. Anybody knows how to fix it?

Question by yonch    |  last reply

using serial port switch on and of An LED

Hi friends i need to using serial port switch on and of An LED. and also i want to know about how db9 connector is sending and receiving the bits or bytes. I am Electrical & Electronics Engineering Student.... I need Some Tutorial To know about the Serial port.....

Topic by uvaraj6    |  last reply

I cant seem to find my board on serial port on arduino?

I am using an arduino mega2560, earlier this year I have programmed the board to blink and it worked, but then after I start  trying more sketches now, the board no longer shows on the serial port, both the power led and pin 13 led work(i programmed it before and it works) now I've tried it on several computers and my laptop but it still doesn't work please help

Question by JennyL10    |  last reply

Phototransistors interfacing with a serial port

So I really don't have too much experience with interfacing stuff and PCs (read: none) and I have a question. If I was to wire up about 5 phototransistors in series, all with a laser aimed at all of them, with the anode hooked up to TxD, and the cathode hooked up to RxD, and I had a program sending 500 bits to it per second, and checking for response.. will it basically be able to detect if one of the lasers are broken? Thanks!

Topic by cvxdes  

Attiny 2313 & Serial Port

Is it possible, using just an Attiny 2313, to exchange data with a computer via serial -- or do I need one of those RS232 chips?Theoretically, I think I can, using the digital IOs, dispite its lack of efficiency, but there may be some problem with that...Sending is the main part that I'm not quite confident about ;-)

Topic by zachninme    |  last reply

Is there any way for the Serial port to detect continuity?

Like if i have 3 switches how could i detect weather they are on of off? Keep it simple,thanks. Edit:its the 9 pin serial port

Question by ReCreate    |  last reply

Serial to USB cable?

I have a serial cable for my Garmin Etrex, one side a serial plug the other goes to my GPSR. I am about to get rid of my desktop and only use my laptops but I don't have a serial port on either. Knowing this the serial cable is useless unless I spend another $40 - $50 on a "Serial to USB Converter". So, I cut it to see what and how many wires are inside of it and found only three. I was thinking of making my own cable but I don't understand the difference between the two ports. I saw the GPS 'ible here and it's no help unless you don't have the serial cable already... Here are my questions:1. As long as I connect the proper data in, data out and ground to the USB cable shouldn't it work?2. Are serial ports and USB ports that much different?I read a lot on the pfrancs website and i noticed a few of the connectors looked like they may have had USB cables hooked to them. I've searched and searched but came up with squat! If you have a really good understanding about USB and serial ports can you please help me or direct me to someone who can? Thanks in advance!

Topic by martymunch    |  last reply

PIC Programmer Com Port?

Hello, yesterday, I bought a PIC16F877A Microcontroller and This programmer. I also installed PicPro USB. I am using the serial to usb cable that came with it. The programmer has a location of  Port_#0001.Hub_#0009 in device manager. Now when I open PicPro USB and set it to  port 1, It gives me an error saying: There appears to be a problem accessing the COM port. I cant seem to find whats wrong. [Edit] I think that It is connected to port 24 (hence its name: Prolific USB-to-Serial Comm Port (COM24) ) and the problem with PicPro USB is that it can only have 1 digit port numbers, how do I fix that? Thanks.

Question by Seifpic    |  last reply

Arduino code Porting Please Help? Answered

Hi please can someone port this code from lcd - to serial output to pc thanks :) /*Arduino Controlled Voltage Monitor Code by Will Lyon 12/5/2010 Code for project Power House on TBCS*/ #include //Initialize the library with the numbers of the interface pins LiquidCrystal lcd(7, 8, 9, 10, 11, 12); void setup() {   lcd.begin(16, 2);                      //Set up the LCD's number of columns and rows   lcd.print("  POWER  HOUSE");           //First line opening message   lcd.setCursor(0, 1);   lcd.print("Desktop Pwr Unit");         //Second line opening message   delay(5000);   lcd.setCursor(0, 1);                   //Clear bottom line   lcd.print("                ");   lcd.setCursor(0,0);   lcd.print(" 3v    5v   12v");          //Update top line readout } void loop() {   lcd.setCursor(0, 1);   float f = analogRead(0) * 4.88 / 1023;   // 3.3 => 9.9   lcd.print(f, 2);                        // print float with two decimals   lcd.setCursor(6, 1);   float g = analogRead(1) * 8.5 / 1023;   // 5.0 => 9.9   lcd.print(g, 2);     lcd.setCursor(11, 1);   float h = analogRead(2) * 17.25 / 1023;  // 12.0 => 25.0   lcd.print(h, 2);   delay(1000); }

Question by Daniel Deacon    |  last reply

Palm serial port software suggestions?

Does anyone have any sugegstions/links for good, free software for a Palm V which can send/receive over the Palm's serial port? Logging a session of incoming data would be a major bonus. Thanks! Alex

Topic by trialex    |  last reply


..guys, how could i add usb port to my old ibm thinkpad and anyone here can teach me how to convert a serial port to a usb port in a laptop. can i make that adapter at home? ..pls. help guys ..any instructables?, thanks

Topic by mij    |  last reply

Question about linux and serial port? Answered

The instructable all the code is done in and im using linux nw and i need someway to set this up in linux i don't mind if it is flash for not i just need it to work

Question by wee_man    |  last reply

How to make xy plotter controlled via computer serial port

Is it possible to make a XY plotter which would be controlled by a computer serial port instead of a dedicated processor as everybody someway or the other just do that no matter what version it is

Topic by Unumunu    |  last reply

How to get data from serial port to USB on android tablet?

Hi friends, I'm new in android. I have one tablet,usb-serial port data cable and GPRS device. Now my doubt is i want to get the data from gprs device using that cable.Because the gprs device will connect using the serial port.So it gives the data on serial port. I tried in many ways.But it's not working. Please let me know.

Question by Lavanya S    |  last reply

Does anyone know if it would be possible to use a serial port as a USB port? Like with some hack?

I own a bluetooth serial port adapter that I have no idea how to use.  I had the idea that perhaps it could be used as a standard USB port.  Would this be possible with any combination of hardware and/or software?  If not, would it be possible to create a bluetooth USB port by some other method, such as, with a standard bluetooth dongle?  I believe that this would open a great many  possibilities.  Oh, and let's just assume that I know nothing about soldering, programing, bathing, etc...

Question by chuzzle44    |  last reply

arduino USB keyboard with the serial port NO HARDWARE CHANGES?

I want to have the arduino(uno or duemilanove) to emulate a US keyboard with no hardware changes just printing in word on the serial port a URL will be great please be nice 

Question by act casual    |  last reply

driver for usb to serial converter ?

Hello , I want burn some hex code into the memory of microcontroller so recently I bought usb rs232 serial cable with driver cd. after installing driver I can't find com port in device manger  I see only two option window 7 PORT (COM&PORT;) ZTE Diaagnostics Interface (com 4) ZTE NMEA Device (COM 5) when cd (overfly ) load it come with following files BF-1284 CH341SER direct and net link driver guiter cable driver HL-340 UEPA15C USB RS232 PL driver USb -RS232 I have installed USB RS232 PL driver and USb -RS232  . but I can't find com port in device manger for serial cable ?        

Question by vead    |  last reply

CP2101 USB to serial IC

Sparkfun makes an excellent breakout board for Silicon Laboratories' CP2101 IC. It looks like this board could be used to connect a PC to your microprocessor through a USB port without having to use a MAX232 IC to convert the TTL voltage levels to the serial port voltage levels and then a USB to serial converter. Drivers are available so the PC sees the CP2101 as a COM port so hyper-terminal could be used to communicate with the microP. The 'S' in USB stands for serial, it should would be nice to connect a PC to a microP using only one piece of hardware. Am I right about the CP2101 providing this ability?Any opinions would be appreciated.

Topic by nolte919    |  last reply

Bluetooth speaker serial port communication hack?

Hello everyone, Recently I bought BT speaker (chinese to be specific) it is great, and I tried connecting it to my Win7 PC. It is interesting, because instead of audio device it installed two serial ports on my computer. I am wondering if this can be somehow useful. Maybe i can turn off voice notifications in the speaker or other settings. But the problem is I do not know any serial port commands that I can use.  If you know what can be done using this bluetooth serial port please message me or reply in this topic. here is photo of the speaker if it is somehow helpful. Later I can add some photos of thew chips inside if needed.

Topic by kondzio29    |  last reply

Can the CP2101 USB to serial IC be used to connect a microP directly to a PC without an RS232 port and a MAX232 IC?

Sparkfun makes an excellent breakout board for Silicon Laboratories' CP2101 IC. It looks like this board could be used to connect a PC to your microprocessor through a USB port without having to use a MAX232 IC to convert the TTL voltage levels to the serial port voltage levels and then a USB to serial converter. Drivers are available so the PC sees the CP2101 as a COM port so hyper-terminal could be used to communicate with the microP. The 'S' in USB stands for serial, it should would be nice to connect a PC to a microP using only one piece of hardware. Am I right about the CP2101 providing this ability?

Question by nolte919    |  last reply

How do you get 3D Studio Max's MaxScript to receive serial port signals?

Is anyone familiar enough with MaxScript to know how to receive a serial connection from a USB-Serial adapter? In particular, I want to send a series of analog values to the program from an Arduino when a button is pressed (either a MaxScript panel button, or actual, physical button, whatever is easier).

Question by victus_maestro  

can i program a pic microcontroller with my second monitor port? Answered

Im thinking of building a pic programer, will my laptops external display port work?, i would perfer usb, is there a small usb programer?

Question by pwnag3    |  last reply

Adding custom peripherals to your computer via the serial port

I built a switch for my serial port based on the lirc IR receiver design tested it with the program winLIRC. It is designed for recording IR signals, so all it does is measure the numbers of pulses and spaces. When I tap the switch I can see the according pulses and spaces on the screen, so I know it works.I'm wondering how I can add this switch as an extra key. Press when I press it a window minimizes, an icon flashes, it inserts the letter 'k', or just something.Are that programs that I can use to monitor all action on COM1?DCD = pin 1RTS = pin 7GND = pin 5resistor is 4k7diode is 1N4148

Topic by PR22  

TFDU4100 (PC infrared serial connection)?

I have this infrared transceiver module tfdu411 : data-sheet here the recommended circuit is here well, this circuit is for motherboard with built-in IRDA port , and sure mine does not have one so , can i built this connect this circuit and connect it directly to the serial 9 pins port ? if not , is there any way to connect this module the the PC and build an infrared transceiver ? thank in advance

Question by lu2a  

Help! First time using Arduino on Mac- Serial Port not showing up?!?

After installing the Driver that came with the install software...I still cant see the proper serial port still. What am I doing wrong?

Question by techiekat    |  last reply

Motherboard IDE to USB Device Adapter, Parallel to USB Device, or Serial to USB Device, Adapter Needed for Old Computer.

Hello, I have a Compaq Presario 220C. I know it is very old, but it has great sound, runs windows 95 great, and most importantly it has high sentimental value. The only thing holding me up from making use of it, is that It does not have an ethernet or USB port. It has the following ports available on the motherboard: ISA 8-Bit (Which has low clearance room to fit a card in and not clearance to the right or left either) Parallel Port Game Port IDE Floppy IDE Serial Port I am desperate and very determined to somehow be able to connect a USB Drive or an ethernet port on this computer. Any help would be greatly appreciated. Thanks so much, HandyAndy

Question by handyandyny    |  last reply

Can i make a serial cable for the 3com superstack3 switch?

I have gotten a lend of a 3com superstack 3 48 port gigabit switch, but i dont own a cable to connect the terminal RJ-45 port to my serial port. Is there any way to make my own cable, or set it up using a web browser.

Question by Ralim    |  last reply

USB hub only 1.1 compatible? Answered

Hi, After looking at this USB hub microcontroller page I saw a part where it said this "The TUSB2077A hub is a 3.3-V CMOS device that provides up to seven downstream ports in compliance with the USB version 1.1 specification"Does that mean it's only USB 1.1 compatible?

Question by thermoelectric    |  last reply

Cheap wireless between desktop PC in basement and RS232 device upstairs?

Device upstairs has -RS232 serial port on which is sends and receives data periodically.PC in basement has:-RS232 serial port-USB-and is connected to home WiFi RouterThe device and pc communicate at 115200 bps, currently via a long serial cable...which i'm trying to get rid of.Basically i need a wireless rs232 link  (between serial port of the device, and serial port of the PC)orsome sort of hybrid link (between serial port of device, and  PC  ..via wifi or bluetooth)Cheapest solution i know so far, costing less than  $30-$35, is for a hybrid scenario: -buying a used and cheap  Linksys WiFi Router WRT54G from Ebay, -hacking it to add changed firmware (it's Linux open source), -adding serial port to it ..this basically turns it into a Linux PC with built in Wifi and Serial Port. -write custom Linux program that runs on the Linksys router that sends the serial data to my PC...Might be cheap solution but very scary to me, because i'm only used to writing code for Win32 PC platform.  I know next to nothing about Linux !   Any other ideas?

Question by tintino    |  last reply

can i convert serial, parallel, mouse ports to usb so i can have a usb port on my laptop? Answered

My usb port on my laptop is busted, i tried to fix it but it didn't work so i am looking for something that can convert the ports that I have that still work into a usb female port! any help will be much appreciated!!!

Question by thecookiemonster    |  last reply

Program to read/write data on usb?

I am looking for a program or at least how it can be done on visual basic that: allows the user to read incoming serial information and produce outgoing serial information on windows. Example: Write is selected > Baud rate selected > binary data entered Result: serial data is transmitted through the usb port Thanks!

Question by seanroberts    |  last reply

If I use the serin command where is the serial data stored? Answered

 I am trying to get a GPS module outputting NMEA sentences in ASCII through a serial port to to store it's once per minute output in my picaxe 18X. From here i hope to read these sentences and using a look up table assign each letter or number that has been read a morse code form. This will then be sent to a 433mhz radio module and received on a scanner. I have programmed standard pics before but only using standard inputs and don't really understand where or in what form variables are stored on the picaxe chip so am therefore a bit confused as to how to go about using the serin command. Thanks for any help!

Question by harrier07    |  last reply

Cheap wireless between desktop PC in basement and RS232 device upstairs?

Device upstairs has -RS232 serial port on which is sends and receives data periodically.PC in basement has:-RS232 serial port-USB-connected to home WiFi RouterThe device and pc communicate at 115bps ... currently via a long serial cable.Basically i need a wireless rs232 link  (between serial port of the device, and serial port of the PC)orsome sort of hybrid link (between serial port of device, and  PC  ..via wifi or bluetooth)Cheapest solution i know so far, costing about $40, is for a hybrid scenario: buying a used and cheap  Linksys WiFi Router WRT54G, hacking it to add changed firmware (it's Linux open source), adding serial port to it and connect my device to it + write custom program that runs on the Linksys router that sends the serial data to my PC...Might be cheap solution but very scary to me, because i'm only used to writing code for Win32 PC platform. I know next to nothing about Linux.Any other ideas?

Question by tintino    |  last reply

Adafruits serial programmer help needed

For anyone that owns the serial port programmer, I need help. Where the plug is (cable plug to the micro circuit) What pins are what? the row thats o o-o-o-o- (1 alone, 4 connected) is the + - - - - - right? and whats miso and mosi then? Help! D:I don't under stand on the 10 pin clip, what the heck is what. The sites diagram says theres 9 circus, 1 square. well, theres 10 squares!! It also shows near the plus side, the other 4 pins are ground. well, that means the MOSI,(NC)RESET,SCK, and MISO are all connected. Dont think so.For people who have the circuit be nice if u can label the 10 pins for me, thanks

Topic by Killa-X    |  last reply

how xbee serial work?

Hello i read ultrasonic sensor serial connected to arduino but when i connect xbee between sensor and arduino and i configur my and dl matching and same id what i need to config else i work on 3,3v what i need to do to make it same as i read direct from sonar . this is my code reading from sonar and convert to distance ,i need same work on 2 xbee between sonar and arduino. #include SoftwareSerial mySerial(8, 9,true); // RX, TX int BW=4; char *buffer; byte x; char array[3]; int counter=0; void setup() {   // put your setup code here, to run once:   // set the data rate for the SoftwareSerial port   Serial.begin(9600);   mySerial.begin(9600);   pinMode(BW,OUTPUT);   digitalWrite(BW,LOW);   delay(250);   Serial.println("Calibrartion Cycle ");   delay(150); } void reading(){   mySerial.println(1); while (mySerial.available()) {    x= mySerial.readBytes(buffer,1);    if(*buffer==0x52){    x= mySerial.readBytes(buffer,1);    array[0]=*buffer;    x= mySerial.readBytes(buffer,1);    array[1]=*buffer;    x= mySerial.readBytes(buffer,1);    array[2]=*buffer;    } } delayMicroseconds(220); } void loop() {   // put your main code here, to run repeatedly:   reading();   int Final_inch=(array[0]-48)*100 + (array[1]-48)*10 +(array[2]-48) ;   float Final_cm=Final_inch*2.54;   Serial.print(Final_inch);   Serial.println(" Inch ");   Serial.print(Final_cm);   Serial.println(" cm ");   delay(200); }

Question by adiga123    |  last reply

How to link a microcontroller with a pc using usb or serial port for sendng program from pc to microcontroller?

How can i connect microcontroller with a computer using usb or serial port for sending programs from pc to microcontroller.

Question by prosi09    |  last reply

Using arduino for Serial in/PWM control

Hello I am wondering if there is someone who can help out a super beginner.  I need to write a code that will allow me to type send a serial message to the micro (im using an arduino uno) to be able to set PWM port to a certain percentage thus changing the fade of an led. I would also like the program to echo back to me a text string indicating what has been done. Is there anyone who can help?

Topic by JonH23    |  last reply

How to program atmega16 from a dev board using serial port? Answered

I am a beginner with microcontrolllers. I have a dev board with serial interface but when I connect it to PC, I can't program it,  avrdude refuses to detect it. Am I missing something? It has an atmega16L 8PU, and a MAX232N but no crystal. Can't I directly program it using serial port with PC?

Question by ethanol47    |  last reply

Making a Computer program to output serial data to an arduino?

      I am making an underwater ROV, like a remote controlled submarine, and I am looking for a way to control it.  All of the commands are set up to run off of serial commands going to the on board arduino.  This is what I would like to know: Is there an easy way to send custom serial data over a computers USB port, controlled by some sort of virtual controller

Question by ConnorFD    |  last reply

Cheaper way to program PICAXE? Answered

The USB programming cable for a PICAXE is $25, which seems a bit high. The serial cable is only $5 but my computer doesn't have a serial port. So. This is what I propose to do. Use these the serial cable and a USB to serial cable and a cheap proto board like so: USB to serial + Serial to PICAXE + PICAXE Will this work? If it does, it can save about $12.

Question by cowmanpoke    |  last reply

MicroController Programming Question

So...I have a serial port....and a serial cable (monitor cable) and so....what do I need to program a microchip? What parts/connectors do i need?

Topic by Joe426    |  last reply

remote control for the computer

I'm wondering if there is a way to use the usb as a input port for IR remote control with the instead of using an IR through the serial port. maybe modify those cheapie keyboard/mouse combos?

Topic by roncon55  

How do I control DC & Stepper motors using my PC?

I need to control 4 DC motors (no speed control, only direction) and 1 stepper motor (again no speed control, only direction) for an engineering project of mine using a PC. I am not sure if I should use the serial or the parallel port. Also, I'm comfortable using VB. So it would be helpful if someone could help me with the interfacing circuits and the code or atleast point me to some resources! Please help!

Question by exchequer598    |  last reply

Help with MAX232 Serial Converter troubleshooting?

Ok..long story short.. built this Instructable: (minimal Arduino on poerfboard,.  w/ blank Atmel) I put this on a breaboard instead I then installed Arduino IDE, as well as WinAVR/avrdude I tried to build a parallel programmer: but it didnt work.. (not sure if it because of WinAVR?avrdue setting?  but command line AND flashing bootloader through Arduino IDE did NOT WORK.. AVRDUDE gives this response: avrdude: can't open device "giveio" avrdude: failed to open parallel port "lpt1" pinout for parallel programm was as follows: PP     ATMEL  (pinout) 1    -  19 2    -  17 11  -  18 16  -  1 18  -  GND on breadboard*** no clue even Ive asked and googled.. couldnt find a 'real' solution to this.. so I looked around..and I found a couple MAX232 chips laying around..figured Id use these to build a Serial Converter using this tut: I this all set-up on my breadboard: (pics to check what Im doing wrong) *******(the images shows the vRegulator moved over 1 has been corrected but after pic was taken) I have checked the vRegulator portion..  I have a cap BEFORE the regulator  *bridging GND & output* and I use my meter to check that there is, in fact, 5v coming from it..  and there is... HOWEVER...  the vRegulator gets SUPER HOT, SUPER FAST!... if I dis-connect the pin 16 form the  chip to the ++ then the vRegulator does NOT get hot... once I bridge it.. instant HEAT.. so is it something I have done wrong in my diagram? vRegulator not show in diagram here;; in this diagram.. as soon as I hook up the V++ to pin16 on the chip.. and the cap..etc  something is wrong?? I 'do' have some FTDI cables coming from China for a few bucks.. but this is ONLY for sketch uploading...correct? I also have a true Arduino Due coming as well... but hate waiting weeks when I want to play and get started now! Any help is appreciated..   Im new to all this, so be nice!  LOL thanks gang!

Topic by xl97  

Serial/Console Interface for Video Brochure?

Hello All!  I recently acquired one of those cheap video brochures (the kind that loops a video on full volume until you want to dash it against a wall)... Anyways, I couldn't resist the urge to hack with it, so I pulled the enclosure apart to expose the electronics. Inside I found a magnetic switch, a USB mini connector with all pins wired (two power/two data), a motherboard with three ICs and a scattering of other components, and a rechargeable battery (seems to be LiPo) all wired up to a 5.5" display. I plugged the usb to my computer and it mounted as a drive labeled "MediaPlayer". Inside was the original video file that I replaced with one of my own videos in the same format. It now plays my video with sound. Where I am stumped is with the circuit board. I have not found any markings on the board itself, however it has some pins around the edge to which the switch and speaker were connected to (I'm guessing these may be GPIOs.....). There is also an unpopulated four pin header (to the right of the display connector) that looks like it may possibly be for another USB port. There are also four solderable connections (on the bottom of the left side of the board) that are labeled GND, HRP, HRL, and DET... I wasn't able to find any meaning for those, but is it possible to establish communication through that? Last but not least, the three ICs on the board seem to be a CPU, and two flash chips. The markings on the center one (which I'm assuming is the CPU) are: F1 E200 F8148DA 19H1  The second IC, to the right of the "CPU" is marked: hynix 812A HY5DU121622CTP-D43 KOR N7EAX553Q2 - also engraved with the letters JHY The final IC, left of the "CPU" is marked: hynix KOR HY27UF082G2M TPCB 604A M8SD53321 According to Google, the E200 refers to the all winner E200 SoC that supports UART, SPI and TWI... It also says that it runs OS Melis 2.0... I would like to hack into this system if possible and/or find a way to interface the LCD through SPI for my Pi Zero... Any help is greatly appreciated! Thanks! I included a couple of High Res photos to show the PCB (the display ribbon cable has been removed to show the third IC). 

Question by JoeW79    |  last reply

FTDI VCOM port USB2.0 my head meeting the wall

OK  for real this has been going on for days n' days. I cant get my windows xp pro sp3   - to see any attached device other than the USB2.0-SERIAL  it sees when I hook up my UNO clone-ATMega 328 w/ arduino bootloader already "factory "installed   - Using the USB,  I keep getting  NEW DEVICE USB2.0-SERIAL , and YES, I've followed ALL+ the step by steps out there for doing's just I dont get an UNO nor anything but the USB2.0 message. The FTDI  bit and the virtual com port did capital N-othing. I uninstalled -reinstalled tried different USB ports. I just want to play with my UNO!!!   anyone?

Question by schel  

USB Infrared Receiver for PC

 I have been wanting to build a USB Infrared Receiver because I do not have a serial port, and I do not want to use a USB to serial. What do you all think of this idea?

Topic by colton.asu  

"HC Off-Line Occured" while Interface Sysmex Xp100 machine using serial cable

We are Interface Sysmex XP100 Hematology machine, but we got "HC Off-Line Occured" error. We are using Serial Port 9-pin female pins (2-->3, 3-->2, 5-->5) Our Code To Open Serial Port: SerialPort comport = new SerialPort(); comport.BaudRate = int.Parse(cmbBaudRate.Text); comport.DataBits = int.Parse(cmbDataBits.Text); comport.StopBits = (StopBits)Enum.Parse(typeof(StopBits), cmbStopBits.Text); comport.Parity = (Parity)Enum.Parse(typeof(Parity), cmbParity.Text); comport.PortName = cmbPortName.Text; comport.Open(); Port successfully open, but when XP100 machine send output, it shows "HC Off-Line Occured" error. Please provide possible solution.

Topic by vishal2    |  last reply