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I have a used Dell Inspiron 8200 laptop that is old enough to have a serial
port. I’m trying to use a serial port IR tower to program an RCX and am having
problems. When I plug in the tower the green light turns on immediately, which
AFAIK is not normal, and any NQC command I try comes back with “No reply from
RCX.” Here is some output from the command-line NQC’s verbose option, in case it
helps:
Tx: 55 ff 00 10 ef 10 ef
Rx: 55 ff 00 10 ef 10 ef
Retrying...
Tx: 55 ff 00 10 ef 10 ef
Rx: 55 ff 00 10 ef 10 ef
Retrying...
Tx: 55 ff 00 10 ef 10 ef
Rx: 55 ff 00 10 ef 10 ef
Retrying...
Tx: 55 ff 00 10 ef 10 ef
Rx: 55 ff 00 10 ef 10 ef
Retrying...
Tx: 55 ff 00 18 e7 18 e7
Rx: 55 ff 00 18 e7 18 e7
Retrying...
Tx: 55 ff 00 18 e7 18 e7
Rx: 55 ff 00 18 e7 18 e7
Retrying...
Tx: 55 ff 00 18 e7 18 e7
Rx: 55 ff 00 18 e7 18 e7
Retrying...
Tx: 55 ff 00 18 e7 18 e7
Rx: 55 ff 00 18 e7 18 e7
Retrying...
No reply from RCX
I used this command, specifically:
C:\nqc>nqc -SCOM3 -v -d -pgm 2 test.nqc > output.txt
I’ve also tried this in BrixcCC and it can’t get a response from the brick,
either. Meanwhile, on another machine the IR tower and RCX work fine.
I believe that COM1 and COM2 on this machine are the PCMCIA slots which are
currently unused. To make sure I wrote a quick C# console app to get a list of
all the COM ports:
using System;
using System.Collections.Generic;
using System.Text;
using System.IO.Ports;
namespace ConsoleApplication1
{
class Program
{
static void Main(string[] args)
{
string[] lPorts = SerialPort.GetPortNames();
foreach(string port in lPorts)
Console.WriteLine(port);
}
}
}
It simply reports “COM3,” and this is also the only port BricxCC can find when I
try its automatic discovery option. I have a USB tower I can use (but haven’t
tried yet), but because I also want to use this laptop with the old Dacta
Control Lab, I need to make sure the serial port works.
Does anyone have an idea of what’s wrong?
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Message has 2 Replies:
 | | Re: IR tower problems on a laptop with NQC
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| The light goes on as soon as you plug in the tower? Sounds like someone is already using COM3. I was looking around DELL technical support and you may have a bit of work ahead of you. First off your serial port on the inspiron 8200 should be COM1. I (...) (17 years ago, 9-Mar-07, to lugnet.robotics.rcx, FTX)
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