"Peter" <peter@greatnowhere.com> wrote in message
news:2t4648F1rrgtkU1@uni-berlin.de...
>> > consider this: it's going to be a
>> > standalone unit, and connected to servers only via Internet
>> > (Ethernet or serial PPP + GPRS modem). It will need to send off
>> > data periodically to the server. Can a microcontroller handle
>> > this?
>>
>> thats exactly what microcontrolers are for !
>
> OK, point me towards a cheapo MC that has 2 serial ports + 1-wire
> interface.
> Basic Stamp could work, but it's awfully expensive for it's
> functionality -
> Maxim's TINI sells for ~80$ (2 serials + 1wire + ethernet + Java + ssh
> access + ftp access + godknowswhatelse)
>
> Peter
Reply by Michael Schnell●October 13, 20042004-10-13
> OK, point me towards a cheapo MC that has 2 serial ports + 1-wire interface.
> Basic Stamp could work, but it's awfully expensive for it's functionality -
> Maxim's TINI sells for ~80$ (2 serials + 1wire + ethernet + Java + ssh
> access + ftp access + godknowswhatelse)
>
You might want to take a look at the Ubicom 2022. I think it can do all
this (with exception of the interpreters for JAVA / PERL) with it's
internal flash and RAM for some $7. You only need to add a crystal. It
does have a power save mode that slows down or stops the CPU while a
timer can wake it.
They offer an upgrade path to the 3023 that is much more powerful but
needs more external components.
See www.ubicom.com
-Michael
Reply by RusH●October 13, 20042004-10-13
"Peter" <peter@greatnowhere.com> wrote :
> OK, point me towards a cheapo MC that has 2 serial ports + 1-wire
> interface.
> > consider this: it's going to be a
> > standalone unit, and connected to servers only via Internet
> > (Ethernet or serial PPP + GPRS modem). It will need to send off
> > data periodically to the server. Can a microcontroller handle
> > this?
>
> thats exactly what microcontrolers are for !
OK, point me towards a cheapo MC that has 2 serial ports + 1-wire interface.
Basic Stamp could work, but it's awfully expensive for it's functionality -
Maxim's TINI sells for ~80$ (2 serials + 1wire + ethernet + Java + ssh
access + ftp access + godknowswhatelse)
Peter
Reply by RusH●October 13, 20042004-10-13
"Peter" <peter@greatnowhere.com> wrote :
> consider this: it's going to be a
> standalone unit, and connected to servers only via Internet
> (Ethernet or serial PPP + GPRS modem). It will need to send off
> data periodically to the server. Can a microcontroller handle
> this?
thats exactly what microcontrolers are for !
Pozdrawiam.
--
RusH //
http://randki.o2.pl/profil.php?id_r=352019
Like ninjas, true hackers are shrouded in secrecy and mystery.
You may never know -- UNTIL IT'S TOO LATE.
Reply by Peter●October 13, 20042004-10-13
> >Also, it takes regulated 5V while all solar
> > panels/batteries I've been able to find are 12V.
> >
> >
>
> If you don't know about switching voltage regulators, please stop
> thinking about building solar driven intelligent devices.
Hey, we all gotta start somewhere! ;) Will have to learn this stuph about
voltage regulators I guess... this is a learning experience for me.
Peter
Reply by Michael Schnell●October 13, 20042004-10-13
>Also, it takes regulated 5V while all solar
> panels/batteries I've been able to find are 12V.
>
>
If you don't know about switching voltage regulators, please stop
thinking about building solar driven intelligent devices.
-Michael
Reply by T Marchini●October 12, 20042004-10-12
Peter wrote:
>>>Definitely cheap, $59.95.
>>
>><*Spits coffee all over keyboard*>
>>
>>(In comp.os.linux.embedded, $60.00 is cheap, but
>>in comp.arch.embedded, $1.00 to $0.10 is cheap.)
>
>
> Geez man, TS 7200 is 160$... definitely more expensive than Linksys unit!
>
>
The TS-7200 will have more capabilities and expandability.
The Linksys will be more fun for hacking.
Its really up to you.
T.
Reply by Klaus Vestergaard Kragelund●October 12, 20042004-10-12
"moocowmoo" <meltyb@hotmail.com> wrote in message
news:ckgcv1$v1$1$8302bc10@news.demon.co.uk...
> > anyway), Java runtime, PPP support, cheap (70$ or so + development
> interface
> > 100-150$). My only reservation about this board is that it plugs into
SIMM
> > connector which means I'll have to connect all physical connectors
(serial
> > etc) to it somehow. Also, it takes regulated 5V while all solar
> > panels/batteries I've been able to find are 12V.
> >
> >
>
> You will need to regulate the solar cell output. If you want the thing to
> work at night you will also need battery power. Look at a shunt regulator
> for the charging the battery and a DC/DC converter to go down from 12V to
> 5V.
>
Be sure to put in a switchmode converter with MPPT to optimize the power
from the panel. A shunt converter set at a fixed voltage will be very
in-efficiant
/Klaus
Reply by moocowmoo●October 12, 20042004-10-12
"Peter" <peter@greatnowhere.com> wrote in message
news:2t1nnbF1q4b45U1@uni-berlin.de...
> > PPP dialup? Any MCs capable of doing this?
>
> Never mind, I found the answer... TINIm400
> (http://www.ibutton.com/TINI/index.html) fits the bill perfectly: dual
> serial ports, ethernet, 1-wire interface (which I need for weather station
> anyway), Java runtime, PPP support, cheap (70$ or so + development
interface
> 100-150$). My only reservation about this board is that it plugs into SIMM
> connector which means I'll have to connect all physical connectors (serial
> etc) to it somehow. Also, it takes regulated 5V while all solar
> panels/batteries I've been able to find are 12V.
>
>
You will need to regulate the solar cell output. If you want the thing to
work at night you will also need battery power. Look at a shunt regulator
for the charging the battery and a DC/DC converter to go down from 12V to
5V.
Peter
---
Outgoing mail is certified Virus Free.
Checked by AVG anti-virus system (http://www.grisoft.com).
Version: 6.0.745 / Virus Database: 497 - Release Date: 27/08/04