433MHz to LAN gateway or miniserver?

[Joerg]

Other domes aren't such a problem (though the new Dallas domed stadium is
another). Directional antennas don't help on the base (even on the ceiling
pointed down) and don't work very well attached to a human walking about. ;-)

Why don't they help at the base if you'd use helixes and the like? The
person can't have one of course and you'd need stage hands to follow
persons with the base antenna. And not smoke any "stuff" while doing
that job

I assume a motion to get the dome painted with RF absorbant coating on
the inside would get dismissed ...

That's what we're using for the base. The mobile unit has a patch built into
it (no protrusions). That's a problem below 2.4G.

There are ways to use heavily shortened non-protruding antennas down
there, or use any otherwise attached cables as antenna. But not knowing
the app it's hard to say.

 

[Joerg]

Nice project! I have a Linkstation (a NAS) and installed a custom firmware
and a regular Debian system some time ago (Apache works without problems).
Looks like a serial port can be added to this device, too:

http://buffalo.nas-central.org/index.php/Add_a_Serial_port_to_the_ARM9_Linkstation

A NAS with 500 GB hardddisk for 100 euro and the capability to add custom
hardware with a simple serial port protocol and control it from a Linux
system, sounds like some interesting ideas can be implemented with it
without much work. A long-term recording seismometer with high sample rate
would be cool

The firewall-router here in the office is a SMC Barricade. It has both a
serial port and a parallel port built in. The RS232 is meant to be used
as backup if the connection goes down and the other is for a printer. I
could imagine one could hack that (but I don't know, other than that
people have talked to the router via RS232) and then you wouldn't even
have to fire up the solder station

 

[Joerg]

Yes, sorry typo:
USofApes

You are one of the people from whom I would not have expected rude
remarks like that. Sad.

 

[[email protected]]

You are one of the people from whom I would not have expected rude
remarks like that. Sad.

I would. He's been a US hating Europeon for the decade or so I've known him
on the Usenet.

 

[[email protected]]

Why don't they help at the base if you'd use helixes and the like? The
person can't have one of course and you'd need stage hands to follow
persons with the base antenna. And not smoke any "stuff" while doing
that job

Well, the "stage hands" are the users so the unions would be happy to have a
stage hand per stage hand (per...) for full employment.

I assume a motion to get the dome painted with RF absorbant coating on
the inside would get dismissed ...

I'd think it would have to be pretty good stuff, if it were reasonable
financially. The distance off the roof isn't very different than a straight
line. 1/r^2 isn't going to help much so the material would have to do
everything.

There are ways to use heavily shortened non-protruding antennas down
there, or use any otherwise attached cables as antenna. But not knowing
the app it's hard to say.

Shortened antennas aren't as efficient, which is a big problem. We're fine
with the 2.4G antenna but it's a close call whether we'll find a suitable
antenna at 900MHz. 433 would be twice again the problem. As you alluded to
before, though, 900MHz is really only suitable for the US.

 

[Nico Coesel]

Nice project! I have a Linkstation (a NAS) and installed a custom firmware
and a regular Debian system some time ago (Apache works without problems).
Looks like a serial port can be added to this device, too:

http://buffalo.nas-central.org/index.php/Add_a_Serial_port_to_the_ARM9_Linkstation

A NAS with 500 GB hardddisk for 100 euro and the capability to add custom
hardware with a simple serial port protocol and control it from a Linux
system, sounds like some interesting ideas can be implemented with it
without much work. A long-term recording seismometer with high sample rate
would be cool

I know someone who turned the Linksys NSL2U into a remote doorbell
logging device for 100+ shops from a big franchise. Now they can see
exactly how many and when people went into their stores. Modifying the
NSL2U was the cheapest way to get the project done.

 

[Nico Coesel]

Nice project! I have a Linkstation (a NAS) and installed a custom firmware
and a regular Debian system some time ago (Apache works without problems).
Looks like a serial port can be added to this device, too:

http://buffalo.nas-central.org/index.php/Add_a_Serial_port_to_the_ARM9_Linkstation

A NAS with 500 GB hardddisk for 100 euro and the capability to add custom
hardware with a simple serial port protocol and control it from a Linux
system, sounds like some interesting ideas can be implemented with it
without much work. A long-term recording seismometer with high sample rate
would be cool

One of our designs is a switch plus a small microcontroller with
network connectivity and some I/O (including a serial port). If I'm
counting right that device has turned into 15 different products
already!