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2005-11-10 by fredrikssonjohan
Hi! Sorry if this is a stupid question, but I haven't found any good info about the UART levels so I better ask! Need to connect a LPC2138 to a Maxim (Dallas) DS2480B which is on 5V. Can they talk as it is or do I need a 3.3 to 5V buffer between? Thanks for any help! Cheers /Johan
2005-11-10 by seangra
Short answer, NO. For any electrical part you can look in the schematics, find the "DC ELECTRICAL CHARACTERISTICS" section, and check the "INPUT HIGH VOLTAGE". In your case it's minimum 3.4V, so the 3.3V output from the LPC2138 won't work. Odd, because most 5V parts have an input high voltage around 2.5V, as it is with most of my parts on my design. --- In lpc2000@yahoogroups.com, "fredrikssonjohan" <johan@s...> wrote:
> > Hi! > > Sorry if this is a stupid question, but I haven't found any good info > about the UART levels so I better ask! > > Need to connect a LPC2138 to a Maxim (Dallas) DS2480B which is on 5V. > Can they talk as it is or do I need a 3.3 to 5V buffer between? > > Thanks for any help! > > Cheers > /Johan >
2005-11-10 by Karl Olsen
---- Original Message ---- From: "seangra" <sgraham@...> To: <lpc2000@yahoogroups.com> Sent: Thursday, November 10, 2005 9:11 PM Subject: [lpc2000] Re: Is LPC2138 UART levels OK for a 5V part? > Short answer, NO. > > For any electrical part you can look in the schematics, find the "DC > ELECTRICAL CHARACTERISTICS" section, and check the "INPUT HIGH > VOLTAGE". In your case it's minimum 3.4V, so the 3.3V output from > the LPC2138 won't work. Odd, because most 5V parts have an input > high voltage around 2.5V, as it is with most of my parts on my > design. That Vih,min of 3.4V is for the 1-wire pin. I guess Johan wants to connect the LPC2138 to the RXD and TXD pins which have Vih,min=2.7V, and he should be okay without buffers. Karl Olsen
> --- In lpc2000@yahoogroups.com, "fredrikssonjohan" <johan@s...> > wrote: >> >> Sorry if this is a stupid question, but I haven't found any good >> info about the UART levels so I better ask! >> >> Need to connect a LPC2138 to a Maxim (Dallas) DS2480B which is on >> 5V. Can they talk as it is or do I need a 3.3 to 5V buffer between?
2005-11-10 by derbaier
The 3.4V logic high minimum seems to be on the 1-wire side of the interface. The UART side looks like it has the usual 2.7V minimum logic high. In that case, it should interface with a CMOS 3.3 volt part with no difficulty. -- Dave --- In lpc2000@yahoogroups.com, "seangra" <sgraham@o...> wrote:
> > Short answer, NO. > > For any electrical part you can look in the schematics, find the "DC > ELECTRICAL CHARACTERISTICS" section, and check the "INPUT HIGH > VOLTAGE". In your case it's minimum 3.4V, so the 3.3V output from the > LPC2138 won't work. Odd, because most 5V parts have an input high > voltage around 2.5V, as it is with most of my parts on my design. > > --- In lpc2000@yahoogroups.com, "fredrikssonjohan" <johan@s...> wrote: > > > > Hi! > > > > Sorry if this is a stupid question, but I haven't found any good info > > about the UART levels so I better ask! > > > > Need to connect a LPC2138 to a Maxim (Dallas) DS2480B which is on 5V. > > Can they talk as it is or do I need a 3.3 to 5V buffer between? > > > > Thanks for any help! > > > > Cheers > > /Johan > > >
2005-11-10 by seangra
Sorry, my bad! 2.7V seems a lot more reasonable for input level. So yes, it should work without a buffer! --- In lpc2000@yahoogroups.com, "derbaier" <dershu@s...> wrote: > > > The 3.4V logic high minimum seems to be on the 1-wire side of the > interface. The UART side looks like it has the usual 2.7V minimum > logic high. In that case, it should interface with a CMOS 3.3 volt > part with no difficulty. > > -- Dave > > > --- In lpc2000@yahoogroups.com, "seangra" <sgraham@o...> wrote: > > > > Short answer, NO. > > > > For any electrical part you can look in the schematics, find the "DC > > ELECTRICAL CHARACTERISTICS" section, and check the "INPUT HIGH > > VOLTAGE". In your case it's minimum 3.4V, so the 3.3V output from the > > LPC2138 won't work. Odd, because most 5V parts have an input high > > voltage around 2.5V, as it is with most of my parts on my design. > > > > --- In lpc2000@yahoogroups.com, "fredrikssonjohan" <johan@s...> wrote: > > > > > > Hi! > > > > > > Sorry if this is a stupid question, but I haven't found any good info > > > about the UART levels so I better ask! > > > > > > Need to connect a LPC2138 to a Maxim (Dallas) DS2480B which is on 5V.
> > > Can they talk as it is or do I need a 3.3 to 5V buffer between? > > > > > > Thanks for any help! > > > > > > Cheers > > > /Johan > > > > > >
2005-11-10 by Ake Hedman, eurosource
Not my business but why use the DS-2480? Its code available for 1-Wire/LPC that works perfectly with the use of one pin and a pull up resistor. Send you a copy if you like. /Ake fredrikssonjohan wrote: > Hi! > > Sorry if this is a stupid question, but I haven't found any good info > about the UART levels so I better ask! > > Need to connect a LPC2138 to a Maxim (Dallas) DS2480B which is on 5V. > Can they talk as it is or do I need a 3.3 to 5V buffer between? > > Thanks for any help! > > Cheers > /Johan > > > > > ------------------------------------------------------------------------ > YAHOO! GROUPS LINKS > > * Visit your group "lpc2000 > <http://groups.yahoo.com/group/lpc2000>" on the web. > > * To unsubscribe from this group, send an email to: > lpc2000-unsubscribe@yahoogroups.com > <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > Service <http://docs.yahoo.com/info/terms/>. > > > ------------------------------------------------------------------------ > -- --- Ake Hedman (YAP - Yet Another Programmer) eurosource, Brattbergavägen 17, 820 50 LOS, Sweden Phone: (46) 657 413430 Cellular: (46) 73 84 84 102 Company home: http://www.eurosource.se Kryddor/Te/Kaffe: http://www.brattberg.com Personal homepage: http://www.eurosource.se/akhe Automated home: http://www.vscp.org [Non-text portions of this message have been removed]
2005-11-11 by Martin Maurer
Can you upload the code ? Thanks !
Regards,
Martin----- Original Message ----- From: "Ake Hedman, eurosource" <akhe@...> To: <lpc2000@yahoogroups.com> Sent: Thursday, November 10, 2005 10:25 PM Subject: Re: [lpc2000] Is LPC2138 UART levels OK for a 5V part? Not my business but why use the DS-2480? Its code available for 1-Wire/LPC that works perfectly with the use of one pin and a pull up resistor. Send you a copy if you like. /Ake fredrikssonjohan wrote: > Hi! > > Sorry if this is a stupid question, but I haven't found any good info > about the UART levels so I better ask! > > Need to connect a LPC2138 to a Maxim (Dallas) DS2480B which is on 5V. > Can they talk as it is or do I need a 3.3 to 5V buffer between? > > Thanks for any help! > > Cheers > /Johan > > > > > ------------------------------------------------------------------------ > YAHOO! GROUPS LINKS > > * Visit your group "lpc2000 > <http://groups.yahoo.com/group/lpc2000>" on the web. > > * To unsubscribe from this group, send an email to: > lpc2000-unsubscribe@yahoogroups.com > <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > Service <http://docs.yahoo.com/info/terms/>. > > > ------------------------------------------------------------------------ > -- --- Ake Hedman (YAP - Yet Another Programmer) eurosource, Brattbergavägen 17, 820 50 LOS, Sweden Phone: (46) 657 413430 Cellular: (46) 73 84 84 102 Company home: http://www.eurosource.se Kryddor/Te/Kaffe: http://www.brattberg.com Personal homepage: http://www.eurosource.se/akhe Automated home: http://www.vscp.org [Non-text portions of this message have been removed] Yahoo! Groups Links
2005-11-11 by fredrikssonjohan
Hi! The main reason for using it was because it takes care of timings and adjust depending on the load of the 1-wire bus. I use it with a mux and collects data from 8 channels. A normal load is 32pcs of DS1822 on 180 meter cable. Another example is 1200 sensors spread over a 3600 meter of cables muxed to 80 channels. How reliable would you say the bit banged one is when you have bigger loads and longer lines? As said in a later reply, please upload to file area if possible! /Johan PS. Roligt att träffa på fler från Svedala här. :-) --- In lpc2000@yahoogroups.com, "Ake Hedman, eurosource" <akhe@b...> wrote:
> > Not my business but why use the DS-2480? Its code available for > 1-Wire/LPC that works perfectly with the use of one pin and a pull up > resistor. Send you a copy if you like. > > /Ake
2005-11-11 by Ake Hedman, eurosource
I send it directly to you. /Ake Martin Maurer wrote: > Can you upload the code ? Thanks ! > > Regards, > > Martin > > ----- Original Message ----- > From: "Ake Hedman, eurosource" <akhe@...> > To: <lpc2000@yahoogroups.com> > Sent: Thursday, November 10, 2005 10:25 PM > Subject: Re: [lpc2000] Is LPC2138 UART levels OK for a 5V part? > > > Not my business but why use the DS-2480? Its code available for > 1-Wire/LPC that works perfectly with the use of one pin and a pull up > resistor. Send you a copy if you like. > > /Ake > > > fredrikssonjohan wrote: > > > Hi! > > > > Sorry if this is a stupid question, but I haven't found any good info > > about the UART levels so I better ask! > > > > Need to connect a LPC2138 to a Maxim (Dallas) DS2480B which is on 5V. > > Can they talk as it is or do I need a 3.3 to 5V buffer between? > > > > Thanks for any help! > > > > Cheers > > /Johan > > > > > > > > > > ------------------------------------------------------------------------ > > YAHOO! GROUPS LINKS > > > > * Visit your group "lpc2000 > > <http://groups.yahoo.com/group/lpc2000>" on the web. > > > > * To unsubscribe from this group, send an email to: > > lpc2000-unsubscribe@yahoogroups.com > > <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> > > > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > > Service <http://docs.yahoo.com/info/terms/>. > > > > > > ------------------------------------------------------------------------ > > > > > -- > --- > Ake Hedman (YAP - Yet Another Programmer) > eurosource, Brattbergavägen 17, 820 50 LOS, Sweden > Phone: (46) 657 413430 Cellular: (46) 73 84 84 102 > Company home: http://www.eurosource.se > Kryddor/Te/Kaffe: http://www.brattberg.com > Personal homepage: http://www.eurosource.se/akhe > Automated home: http://www.vscp.org > > > > [Non-text portions of this message have been removed] > > > > > > Yahoo! Groups Links > > > > > > > > > > SPONSORED LINKS > Microprocessor > <http://groups.yahoo.com/gads?t=ms&k=Microprocessor&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=tsVC-J9hJ5qyXg0WPR0l6g> > Microcontrollers > <http://groups.yahoo.com/gads?t=ms&k=Microcontrollers&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=DvJVNqC_pqRTm8Xq01nxwg> > Pic microcontrollers > <http://groups.yahoo.com/gads?t=ms&k=Pic+microcontrollers&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=TpkoX4KofDJ7c6LyBvUqVQ> > > 8051 microprocessor > <http://groups.yahoo.com/gads?t=ms&k=8051+microprocessor&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=1Ipf1Fjfbd_HVIlekkDP-A> > > > > ------------------------------------------------------------------------ > YAHOO! GROUPS LINKS > > * Visit your group "lpc2000 > <http://groups.yahoo.com/group/lpc2000>" on the web. > > * To unsubscribe from this group, send an email to: > lpc2000-unsubscribe@yahoogroups.com > <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > Service <http://docs.yahoo.com/info/terms/>. > > > ------------------------------------------------------------------------ > -- --- Ake Hedman (YAP - Yet Another Programmer) eurosource, Brattbergavägen 17, 820 50 LOS, Sweden Phone: (46) 657 413430 Cellular: (46) 73 84 84 102 Company home: http://www.eurosource.se Kryddor/Te/Kaffe: http://www.brattberg.com Personal homepage: http://www.eurosource.se/akhe Automated home: http://www.vscp.org [Non-text portions of this message have been removed]
2005-11-11 by Ake Hedman, eurosource
Fredrik, >please upload to file area if possible! I will do that. >....1200 sensors... May I as what you do!? Cheers /Ake fredrikssonjohan wrote: > Hi! > > The main reason for using it was because it takes care of timings and > adjust depending on the load of the 1-wire bus. > > I use it with a mux and collects data from 8 channels. A normal load > is 32pcs of DS1822 on 180 meter cable. Another example is 1200 sensors > spread over a 3600 meter of cables muxed to 80 channels. > > How reliable would you say the bit banged one is when you have bigger > loads and longer lines? > > As said in a later reply, please upload to file area if possible! > > /Johan > > PS. Roligt att träffa på fler från Svedala här. :-) > > --- In lpc2000@yahoogroups.com, "Ake Hedman, eurosource" <akhe@b...> > wrote: > > > > Not my business but why use the DS-2480? Its code available for > > 1-Wire/LPC that works perfectly with the use of one pin and a pull up > > resistor. Send you a copy if you like. > > > > /Ake > > > > > > ------------------------------------------------------------------------ > YAHOO! GROUPS LINKS > > * Visit your group "lpc2000 > <http://groups.yahoo.com/group/lpc2000>" on the web. > > * To unsubscribe from this group, send an email to: > lpc2000-unsubscribe@yahoogroups.com > <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > Service <http://docs.yahoo.com/info/terms/>. > > > ------------------------------------------------------------------------ > -- --- Ake Hedman (YAP - Yet Another Programmer) eurosource, Brattbergavägen 17, 820 50 LOS, Sweden Phone: (46) 657 413430 Cellular: (46) 73 84 84 102 Company home: http://www.eurosource.se Kryddor/Te/Kaffe: http://www.brattberg.com Personal homepage: http://www.eurosource.se/akhe Automated home: http://www.vscp.org [Non-text portions of this message have been removed]
2005-11-11 by fredrikssonjohan
We are reading temperatures in silos (bins) mainly with grain but also animal food or other sensitive to heat products. It's 10-90 meter silos with 1-12 cables in each and 1-20 silos and 4-16 sensors per cable. Biggest system as per now is 20 silos, 240 cables and 2400 sensors. All connected with about 8.5km of wire. Just changing from PIC16 to LPC2138 as "heart" of the system. Spent some days just going thrue all data sheets and sometime you just loose focus, as with the UART, to find all specifications and values. Cheers /Johan --- In lpc2000@yahoogroups.com, "Ake Hedman, eurosource" <akhe@b...> wrote:
> > Fredrik, > > >please upload to file area if possible! > I will do that. > > >....1200 sensors... > May I as what you do!? > > Cheers > /Ake >
2005-11-11 by Ake Hedman, eurosource
Thats a lot of sensors!!! Impressive! Have you seen the "Snaku" at http://www.ibuttonlink.com/ /Ake* * fredrikssonjohan wrote: > We are reading temperatures in silos (bins) mainly with grain but also > animal food or other sensitive to heat products. > > It's 10-90 meter silos with 1-12 cables in each and 1-20 silos and > 4-16 sensors per cable. Biggest system as per now is 20 silos, 240 > cables and 2400 sensors. All connected with about 8.5km of wire. > > Just changing from PIC16 to LPC2138 as "heart" of the system. Spent > some days just going thrue all data sheets and sometime you just loose > focus, as with the UART, to find all specifications and values. > > Cheers > /Johan > > --- In lpc2000@yahoogroups.com, "Ake Hedman, eurosource" <akhe@b...> > wrote: > > > > Fredrik, > > > > >please upload to file area if possible! > > I will do that. > > > > >....1200 sensors... > > May I as what you do!? > > > > Cheers > > /Ake > > > > > > > ------------------------------------------------------------------------ > YAHOO! GROUPS LINKS > > * Visit your group "lpc2000 > <http://groups.yahoo.com/group/lpc2000>" on the web. > > * To unsubscribe from this group, send an email to: > lpc2000-unsubscribe@yahoogroups.com > <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > Service <http://docs.yahoo.com/info/terms/>. > > > ------------------------------------------------------------------------ > -- --- Ake Hedman (YAP - Yet Another Programmer) eurosource, Brattbergavägen 17, 820 50 LOS, Sweden Phone: (46) 657 413430 Cellular: (46) 73 84 84 102 Company home: http://www.eurosource.se Kryddor/Te/Kaffe: http://www.brattberg.com Personal homepage: http://www.eurosource.se/akhe Automated home: http://www.vscp.org [Non-text portions of this message have been removed]
2005-11-11 by fredrikssonjohan
Nice system for green houses or other "lighter" use. Our cables are heavy duty, taking a load of 4.5 tons each. As we are mainly in dusty environments we also face the need to meet the ATEX (explosive safe) regulations. We have from a handheld instrument (Windows CE) and a probe that you stick in to the grain to a central computer talking to distributed cards (LPC2138 + DS2480B) via a RS-485 network. 24/7 data collection with unlimited retension of data, alarm triggers individually per sensor / cable, alarm for raising or over temperature, reporting...you name it and it's in there :-) My next step is to add embedded webserver, radio modem, bluetooth and control panel as add-on cards to it. Cheers /Johan --- In lpc2000@yahoogroups.com, "Ake Hedman, eurosource" <akhe@b...> wrote:
> > Thats a lot of sensors!!! Impressive! Have you seen the "Snaku" at > http://www.ibuttonlink.com/ > > /Ake*
2005-11-11 by Jim Parziale
Have yuo considered wireless mesh network nodes as opposed to such long cables? I used to work with 802.15.4 and Zigbee, and that company had a good working solution. I could post the web page if anybody's interested... Jim On 11/11/05, fredrikssonjohan <johan@...> wrote: > > We are reading temperatures in silos (bins) mainly with grain but also > animal food or other sensitive to heat products. > > It's 10-90 meter silos with 1-12 cables in each and 1-20 silos and > 4-16 sensors per cable. Biggest system as per now is 20 silos, 240 > cables and 2400 sensors. All connected with about 8.5km of wire. > > Just changing from PIC16 to LPC2138 as "heart" of the system. Spent > some days just going thrue all data sheets and sometime you just loose > focus, as with the UART, to find all specifications and values. > > Cheers > /Johan > > --- In lpc2000@yahoogroups.com, "Ake Hedman, eurosource" <akhe@b...> > wrote: > > > > Fredrik, > > > > >please upload to file area if possible! > > I will do that. > > > > >....1200 sensors... > > May I as what you do!? > > > > Cheers > > /Ake > > > -- ---------------------------------------------------------- Jim Parziale Malden, MA ---------------------------------------------------------- [Non-text portions of this message have been removed]
2005-11-11 by Ake Hedman, eurosource
Fredrik, I'm very interested in sensor networks. Also something I have been working with for many years now and also do at the moment on an open basis in the VSCP project (http://www.vscp.org) aside of my regular consulting work. Very impressing data for your system. You use RS-484. Never though of CAN instead? Nice with distributed control as it solves arbitration and is reliable to a great extent. /Ake Any reason you fredrikssonjohan wrote: > Nice system for green houses or other "lighter" use. Our cables are > heavy duty, taking a load of 4.5 tons each. As we are mainly in dusty > environments we also face the need to meet the ATEX (explosive safe) > regulations. > > We have from a handheld instrument (Windows CE) and a probe that you > stick in to the grain to a central computer talking to distributed > cards (LPC2138 + DS2480B) via a RS-485 network. 24/7 data collection > with unlimited retension of data, alarm triggers individually per > sensor / cable, alarm for raising or over temperature, reporting...you > name it and it's in there :-) > > My next step is to add embedded webserver, radio modem, bluetooth and > control panel as add-on cards to it. > > Cheers > /Johan > > --- In lpc2000@yahoogroups.com, "Ake Hedman, eurosource" <akhe@b...> > wrote: > > > > Thats a lot of sensors!!! Impressive! Have you seen the "Snaku" at > > http://www.ibuttonlink.com/ > > > > /Ake* > > > > > > > > SPONSORED LINKS > Microprocessor > <http://groups.yahoo.com/gads?t=ms&k=Microprocessor&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=tsVC-J9hJ5qyXg0WPR0l6g> > Microcontrollers > <http://groups.yahoo.com/gads?t=ms&k=Microcontrollers&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=DvJVNqC_pqRTm8Xq01nxwg> > Pic microcontrollers > <http://groups.yahoo.com/gads?t=ms&k=Pic+microcontrollers&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=TpkoX4KofDJ7c6LyBvUqVQ> > > 8051 microprocessor > <http://groups.yahoo.com/gads?t=ms&k=8051+microprocessor&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=1Ipf1Fjfbd_HVIlekkDP-A> > > > > ------------------------------------------------------------------------ > YAHOO! GROUPS LINKS > > * Visit your group "lpc2000 > <http://groups.yahoo.com/group/lpc2000>" on the web. > > * To unsubscribe from this group, send an email to: > lpc2000-unsubscribe@yahoogroups.com > <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > Service <http://docs.yahoo.com/info/terms/>. > > > ------------------------------------------------------------------------ > -- --- Ake Hedman (YAP - Yet Another Programmer) eurosource, Brattbergavägen 17, 820 50 LOS, Sweden Phone: (46) 657 413430 Cellular: (46) 73 84 84 102 Company home: http://www.eurosource.se Kryddor/Te/Kaffe: http://www.brattberg.com Personal homepage: http://www.eurosource.se/akhe Automated home: http://www.vscp.org [Non-text portions of this message have been removed]
2005-11-11 by fredrikssonjohan
CAN bus was thought of but as we needed to interface with an onther RS-485 system it was put in the drawer again. I do am tempted to switch to it as the main bus and in case of old system have a RS-485 doughter card the adopt to them. Will certenly put some time on CAN after this new card is done and maybe change later next year if possible. I'll have a look on the VSCP project also... All products will be on a web site about february next year. Cheers /Johan --- In lpc2000@yahoogroups.com, "Ake Hedman, eurosource" <akhe@b...> wrote: > > Fredrik, > > I'm very interested in sensor networks. Also something I have been > working with for many years now and also do at the moment on an open > basis in the VSCP project (http://www.vscp.org) aside of my regular > consulting work. > > Very impressing data for your system. You use RS-484. Never though of > CAN instead? Nice with distributed control as it solves arbitration and > is reliable to a great extent. > > /Ake > > Any reason you > > fredrikssonjohan wrote: > > > Nice system for green houses or other "lighter" use. Our cables are > > heavy duty, taking a load of 4.5 tons each. As we are mainly in dusty > > environments we also face the need to meet the ATEX (explosive safe) > > regulations. > > > > We have from a handheld instrument (Windows CE) and a probe that you > > stick in to the grain to a central computer talking to distributed > > cards (LPC2138 + DS2480B) via a RS-485 network. 24/7 data collection > > with unlimited retension of data, alarm triggers individually per > > sensor / cable, alarm for raising or over temperature, reporting...you > > name it and it's in there :-) > > > > My next step is to add embedded webserver, radio modem, bluetooth and > > control panel as add-on cards to it. > > > > Cheers > > /Johan > > > > --- In lpc2000@yahoogroups.com, "Ake Hedman, eurosource" <akhe@b...> > > wrote: > > > > > > Thats a lot of sensors!!! Impressive! Have you seen the "Snaku" at > > > http://www.ibuttonlink.com/ > > > > > > /Ake* > > > > > > > > > > > > > > > > SPONSORED LINKS > > Microprocessor > > <http://groups.yahoo.com/gads?t=ms&k=Microprocessor&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=tsVC-J9hJ5qyXg0WPR0l6g> > > Microcontrollers > > <http://groups.yahoo.com/gads?t=ms&k=Microcontrollers&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=DvJVNqC_pqRTm8Xq01nxwg> > > Pic microcontrollers > > <http://groups.yahoo.com/gads?t=ms&k=Pic+microcontrollers&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=TpkoX4KofDJ7c6LyBvUqVQ> > > > > 8051 microprocessor > > <http://groups.yahoo.com/gads?t=ms&k=8051+microprocessor&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=1Ipf1Fjfbd_HVIlekkDP-A> > > > > > > > > ------------------------------------------------------------------------ > > YAHOO! GROUPS LINKS > > > > * Visit your group "lpc2000 > > <http://groups.yahoo.com/group/lpc2000>" on the web. > > > > * To unsubscribe from this group, send an email to: > > lpc2000-unsubscribe@yahoogroups.com > > <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> > > > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > > Service <http://docs.yahoo.com/info/terms/>. > > > > > > ------------------------------------------------------------------------
> > > > > -- > --- > Ake Hedman (YAP - Yet Another Programmer) > eurosource, Brattbergavägen 17, 820 50 LOS, Sweden > Phone: (46) 657 413430 Cellular: (46) 73 84 84 102 > Company home: http://www.eurosource.se > Kryddor/Te/Kaffe: http://www.brattberg.com > Personal homepage: http://www.eurosource.se/akhe > Automated home: http://www.vscp.org > > > > [Non-text portions of this message have been removed] >
2005-11-11 by fredrikssonjohan
Yes, we talked about it in a early stage but as I don't have any knowledge in radio and some customers said that they dont want more radio interferance in their plants made us leave it at that time. The radio module I'm looking at now is for connecting the control room with the plant instead of using up to 500 meter of cable. And if the plant is divided up in two, three groups use radio to make it as one to the control room. But, that will take some study from my side. Seen some nice ready built ones for OEM use with a UART interface to them so maybe I don't need to learn it all myself! Please post the web page if you can. I do like to see it! Cheers /Johan --- In lpc2000@yahoogroups.com, Jim Parziale <nuncio.bitis@g...> wrote: > > Have yuo considered wireless mesh network nodes as opposed to such long > cables? I used to work with 802.15.4 and Zigbee, and that company had a good > working solution. I could post the web page if anybody's interested... > > Jim > > On 11/11/05, fredrikssonjohan <johan@s...> wrote: > > > > We are reading temperatures in silos (bins) mainly with grain but also
> > animal food or other sensitive to heat products. > > > > It's 10-90 meter silos with 1-12 cables in each and 1-20 silos and > > 4-16 sensors per cable. Biggest system as per now is 20 silos, 240 > > cables and 2400 sensors. All connected with about 8.5km of wire. > > > > Just changing from PIC16 to LPC2138 as "heart" of the system. Spent > > some days just going thrue all data sheets and sometime you just loose > > focus, as with the UART, to find all specifications and values. > > > > Cheers > > /Johan > > > > --- In lpc2000@yahoogroups.com, "Ake Hedman, eurosource" <akhe@b...> > > wrote: > > > > > > Fredrik, > > > > > > >please upload to file area if possible! > > > I will do that. > > > > > > >....1200 sensors... > > > May I as what you do!? > > > > > > Cheers > > > /Ake > > > > > > > > > -- > ---------------------------------------------------------- > Jim Parziale > Malden, MA > ---------------------------------------------------------- > > > [Non-text portions of this message have been removed] >
2005-11-11 by Ake Hedman, eurosource
Keep us updated. Very interesting! /Ake fredrikssonjohan wrote: > CAN bus was thought of but as we needed to interface with an onther > RS-485 system it was put in the drawer again. > > I do am tempted to switch to it as the main bus and in case of old > system have a RS-485 doughter card the adopt to them. > > Will certenly put some time on CAN after this new card is done and > maybe change later next year if possible. > > I'll have a look on the VSCP project also... > > All products will be on a web site about february next year. > > Cheers > /Johan > > --- In lpc2000@yahoogroups.com, "Ake Hedman, eurosource" <akhe@b...> > wrote: > > > > Fredrik, > > > > I'm very interested in sensor networks. Also something I have been > > working with for many years now and also do at the moment on an open > > basis in the VSCP project (http://www.vscp.org) > <http://www.vscp.org%29> aside of my regular > > consulting work. > > > > Very impressing data for your system. You use RS-484. Never though of > > CAN instead? Nice with distributed control as it solves arbitration > and > > is reliable to a great extent. > > > > /Ake > > > > Any reason you > > > > fredrikssonjohan wrote: > > > > > Nice system for green houses or other "lighter" use. Our cables are > > > heavy duty, taking a load of 4.5 tons each. As we are mainly in dusty > > > environments we also face the need to meet the ATEX (explosive safe) > > > regulations. > > > > > > We have from a handheld instrument (Windows CE) and a probe that you > > > stick in to the grain to a central computer talking to distributed > > > cards (LPC2138 + DS2480B) via a RS-485 network. 24/7 data collection > > > with unlimited retension of data, alarm triggers individually per > > > sensor / cable, alarm for raising or over temperature, reporting...you > > > name it and it's in there :-) > > > > > > My next step is to add embedded webserver, radio modem, bluetooth and > > > control panel as add-on cards to it. > > > > > > Cheers > > > /Johan > > > > > > --- In lpc2000@yahoogroups.com, "Ake Hedman, eurosource" <akhe@b...> > > > wrote: > > > > > > > > Thats a lot of sensors!!! Impressive! Have you seen the > "Snaku" at > > > > http://www.ibuttonlink.com/ > > > > > > > > /Ake* > > > > > > > > > > > > > > > > > > > > > > > > SPONSORED LINKS > > > Microprocessor > > > > <http://groups.yahoo.com/gads?t=ms&k=Microprocessor&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=tsVC-J9hJ5qyXg0WPR0l6g > <http://groups.yahoo.com/gads?t=ms&k=Microprocessor&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=tsVC-J9hJ5qyXg0WPR0l6g>> > > > > Microcontrollers > > > > <http://groups.yahoo.com/gads?t=ms&k=Microcontrollers&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=DvJVNqC_pqRTm8Xq01nxwg > <http://groups.yahoo.com/gads?t=ms&k=Microcontrollers&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=DvJVNqC_pqRTm8Xq01nxwg>> > > > > Pic microcontrollers > > > > <http://groups.yahoo.com/gads?t=ms&k=Pic+microcontrollers&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=TpkoX4KofDJ7c6LyBvUqVQ > <http://groups.yahoo.com/gads?t=ms&k=Pic+microcontrollers&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=TpkoX4KofDJ7c6LyBvUqVQ>> > > > > > > > 8051 microprocessor > > > > <http://groups.yahoo.com/gads?t=ms&k=8051+microprocessor&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=1Ipf1Fjfbd_HVIlekkDP-A > <http://groups.yahoo.com/gads?t=ms&k=8051+microprocessor&w1=Microprocessor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=93&.sig=1Ipf1Fjfbd_HVIlekkDP-A>> > > > > > > > > > > > > > > ------------------------------------------------------------------------ > > > YAHOO! GROUPS LINKS > > > > > > * Visit your group "lpc2000 > > > <http://groups.yahoo.com/group/lpc2000>" on the web. > > > > > > * To unsubscribe from this group, send an email to: > > > lpc2000-unsubscribe@yahoogroups.com > > > <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> > > > > > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > > > Service <http://docs.yahoo.com/info/terms/>. > > > > > > > > > > ------------------------------------------------------------------------ > > > > > > > > > -- > > --- > > Ake Hedman (YAP - Yet Another Programmer) > > eurosource, Brattbergavägen 17, 820 50 LOS, Sweden > > Phone: (46) 657 413430 Cellular: (46) 73 84 84 102 > > Company home: http://www.eurosource.se > > Kryddor/Te/Kaffe: http://www.brattberg.com > > Personal homepage: http://www.eurosource.se/akhe > > Automated home: http://www.vscp.org > > > > > > > > [Non-text portions of this message have been removed] > > > > > > > > > ------------------------------------------------------------------------ > YAHOO! GROUPS LINKS > > * Visit your group "lpc2000 > <http://groups.yahoo.com/group/lpc2000>" on the web. > > * To unsubscribe from this group, send an email to: > lpc2000-unsubscribe@yahoogroups.com > <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> > > * Your use of Yahoo! Groups is subject to the Yahoo! Terms of > Service <http://docs.yahoo.com/info/terms/>. > > > ------------------------------------------------------------------------ > -- --- Ake Hedman (YAP - Yet Another Programmer) eurosource, Brattbergavägen 17, 820 50 LOS, Sweden Phone: (46) 657 413430 Cellular: (46) 73 84 84 102 Company home: http://www.eurosource.se Kryddor/Te/Kaffe: http://www.brattberg.com Personal homepage: http://www.eurosource.se/akhe Automated home: http://www.vscp.org [Non-text portions of this message have been removed]
2005-11-11 by Dan Beadle
I am interested in ZigBee information - Do you have a url? _____
From: lpc2000@yahoogroups.com [mailto:lpc2000@yahoogroups.com] On Behalf Of Jim Parziale Sent: Friday, November 11, 2005 4:06 AM To: lpc2000@yahoogroups.com Subject: Re: [lpc2000] Re: Is LPC2138 UART levels OK for a 5V part? Have yuo considered wireless mesh network nodes as opposed to such long cables? I used to work with 802.15.4 and Zigbee, and that company had a good working solution. I could post the web page if anybody's interested... Jim On 11/11/05, fredrikssonjohan <johan@...> wrote: > > We are reading temperatures in silos (bins) mainly with grain but also > animal food or other sensitive to heat products. > > It's 10-90 meter silos with 1-12 cables in each and 1-20 silos and > 4-16 sensors per cable. Biggest system as per now is 20 silos, 240 > cables and 2400 sensors. All connected with about 8.5km of wire. > > Just changing from PIC16 to LPC2138 as "heart" of the system. Spent > some days just going thrue all data sheets and sometime you just loose > focus, as with the UART, to find all specifications and values. > > Cheers > /Johan > > --- In lpc2000@yahoogroups.com, "Ake Hedman, eurosource" <akhe@b...> > wrote: > > > > Fredrik, > > > > >please upload to file area if possible! > > I will do that. > > > > >....1200 sensors... > > May I as what you do!? > > > > Cheers > > /Ake > > > -- ---------------------------------------------------------- Jim Parziale Malden, MA ---------------------------------------------------------- [Non-text portions of this message have been removed] SPONSORED LINKS Microprocessor <http://groups.yahoo.com/gads?t=ms&k=Microprocessor&w1=Microprocessor&w2 =Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s=9 3&.sig=tsVC-J9hJ5qyXg0WPR0l6g> Microcontrollers <http://groups.yahoo.com/gads?t=ms&k=Microcontrollers&w1=Microprocessor& w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c=4&s =93&.sig=DvJVNqC_pqRTm8Xq01nxwg> Pic microcontrollers <http://groups.yahoo.com/gads?t=ms&k=Pic+microcontrollers&w1=Microproces sor&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c =4&s=93&.sig=TpkoX4KofDJ7c6LyBvUqVQ> 8051 microprocessor <http://groups.yahoo.com/gads?t=ms&k=8051+microprocessor&w1=Microprocess or&w2=Microcontrollers&w3=Pic+microcontrollers&w4=8051+microprocessor&c= 4&s=93&.sig=1Ipf1Fjfbd_HVIlekkDP-A> _____ YAHOO! GROUPS LINKS * Visit your group "lpc2000 <http://groups.yahoo.com/group/lpc2000> " on the web. * To unsubscribe from this group, send an email to: lpc2000-unsubscribe@yahoogroups.com <mailto:lpc2000-unsubscribe@yahoogroups.com?subject=Unsubscribe> * Your use of Yahoo! Groups is subject to the Yahoo! Terms of Service <http://docs.yahoo.com/info/terms/> . _____ [Non-text portions of this message have been removed]
2005-11-11 by Joel Winarske
> We are reading temperatures in silos (bins) mainly with grain but also > animal food or other sensitive to heat products. > > It's 10-90 meter silos with 1-12 cables in each and 1-20 silos and > 4-16 sensors per cable. Biggest system as per now is 20 silos, 240 > cables and 2400 sensors. All connected with about 8.5km of wire. > > Just changing from PIC16 to LPC2138 as "heart" of the system. Spent > some days just going thrue all data sheets and sometime you just loose > focus, as with the UART, to find all specifications and values. I'm sure you're aware of the LinkOEM module? It implements Chris Fox's design per his application note, in fact I believe it may incorporate his firmware. http://www.ibuttonlink.com/ Joel
2005-11-11 by Jim Parziale
The company's web site is: http://www.ember.com 802.15.4: http://www.ieee802.org/15/pub/TG4.html Zigbee: http://www.zigbee.org/ On 11/11/05, Dan Beadle <dan.beadle@...> wrote: > > I am interested in ZigBee information - Do you have a url? > -- ---------------------------------------------------------- Jim Parziale Email: nuncio.bitis@... Malden, MA ---------------------------------------------------------- [Non-text portions of this message have been removed]