 | | Re: rcxhttpd?
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(...) Since the RCX has essentially a serial interface to the outside world, you would need to encode and decode the HTTP requests and responses into a serial-based protocol. If you actually wanted the RCX to be plug-and-play compatible with (...) (27 years ago, 19-Jul-99, to lugnet.robotics.rcx)
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| | Re: rcxhttpd?
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(...) Don't forget 'finger'. There's already provisions for vending machines, so it's not much of a stretch. :) (27 years ago, 17-Jul-99, to lugnet.robotics.rcx)
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| | rcxhttpd?
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(OK, I know this sounds perverse, but heck, some high-end printers these days are coming with built-in webservers for configuration, so it's not that perverse.) Has anyone written an HTTP daemon for the RCX? I mean a scaled-down version of httpd (...) (27 years ago, 17-Jul-99, to lugnet.robotics.rcx)
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| | Re: Help with 9738 LEGO Mindstorms Remote Control
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Thanks Dave. I hadn't downloaded the firmware yet. Originally, I was simply hoping to use the remote control and the rcx to drive my trains. So I didn't bother to install the software. Now I know. Again, Thank you. Ben In lugnet.robotics.rcx, Dave (...) (27 years ago, 16-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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(...) Partly, I can think of cases where that might be ugly. But more importantly, I often want to set up a scenario so that two robots will bump into each other in a certain place. (For making movies, showing off to friends, etc.) Can't do that as (...) (27 years ago, 15-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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(...) Huh? You mean, your robot doesn't work unless you point it in a certain direction before starting the program? That doesn't sound too robust. Okay, let's change the algorithm: (this is for a line tracker that follows "dark" lines and relies on (...) (27 years ago, 15-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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(...) going in a circle. (27 years ago, 15-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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(...) That's why I suggested a solution that works in all cases. It's not much harder than your solution either. (URL) Robert Munafo (27 years ago, 15-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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(...) This is my inspiration for adding on-the-fly init code, btw. RoboTag uses two seperate robots, and it turns out that my friend -- the source of the second mindstorms kit -- has a light sensor which reads about 10 "darker" than mine. (27 years ago, 15-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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(...) Wow. I feel I should point out that experimentally my method works 100% of the time. :) On the other hand, mine is a special-case application: the light sensor is used to read color values from a surface, which presumably will have very little (...) (27 years ago, 15-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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Matthew's program takes one reading at initialization time to determine a baseline value. Any reading that falls 7 units below this is assumed to be a dark line. I take a somewhat more conservative approach, taking 10 readings over one second and (...) (27 years ago, 15-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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(...) [snip] (...) Yes -- check out my RoboTag program at (URL) RoboTag, the sensor is pointing at the ground, which is probably grey/brown/white, with black border lines. My program reads the light level at start, and assumes that it isn't on a (...) (27 years ago, 14-Jul-99, to lugnet.robotics.rcx)
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| | Re: Light sensor initialization?
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I haven't done that yet. But if you're doing a line follower, I would suggest the following: 1. First, build the line follower in such a way that it can rotate in place and make the light sensor sweep out a circle on the ground as it rotates. 2. (...) (27 years ago, 13-Jul-99, to lugnet.robotics.rcx)
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| | Lots of new FAQ answers and some revisions
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I have just sumbitted a large number of answers to FAQ questions that hadn't been answered yet, and revisions to other answers. There is also just one answer that I did not change (-: The answers are in the lugnet.faq newsgroup. Here is an index to (...) (27 years ago, 13-Jul-99, to lugnet.robotics.rcx, lugnet.faq)
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| | Light sensor initialization?
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This should be an FAQ at this point, but I'm having trouble tracking down an answer in the LUGNET archives. I'd like my 'bot to measure ambient light levels, and make light/gray/dark decisions based on those levels. For instance, Dave Baum's line (...) (27 years ago, 13-Jul-99, to lugnet.robotics.rcx)
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| | Re: Help with 9738 LEGO Mindstorms Remote Control
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(...) Robolab uses the same firmware as Mindstorms RIS, so the remote should work fine. Same goes for NQC. (...) You can write programs in NQC (also in RCX Code or Robolab) that respond to IR Messages. These messages can be sent from another RCX, (...) (27 years ago, 13-Jul-99, to lugnet.robotics.rcx)
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| | Re: Help with 9738 LEGO Mindstorms Remote Control
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Dave's reply is right on the mark, but I also want to point out that if you have downloaded a non-MindStorms O.S. to the RCX (i.e. any firmware other than the standard LEGO MindStorms firmware) the remote might not work either. I haven't tried any (...) (27 years ago, 12-Jul-99, to lugnet.robotics.rcx)
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| | RE: VERY [OT] Feathers 'n Lead...
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(...) Sorry for the extra quoting here, but the thread was a bit old...and just for everyone's info, both bags have the SAME mass, so they have the same first moment of inertia....I think. The shape of the object generally affects the SECOND momemnt (...) (27 years ago, 12-Jul-99, to lugnet.robotics.rcx)
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| | Re: VERY [OT] Feathers 'n Lead...
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(...) I think the original poster was putting his tongue firmly in cheek there. BTW, the dropping of objects would be a second experimental proof that gravity affects all objects equally regardless of weight. Best test being in a vacuum where you (...) (27 years ago, 12-Jul-99, to lugnet.robotics.rcx)
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| | Re: [OT] Feathers 'n Lead...
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(...) being (...) as (...) MORE (...) the dropping of the objects on the moon was to prove that when 2 objects are dropped from the same height in an environment with little or no friction they will hit the ground at the same time. both bags weigh (...) (27 years ago, 12-Jul-99, to lugnet.robotics.rcx)
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