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#1
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APC UPS won't talk to me
[Re-posted with new subject and more appropriate NG's)
Using a USB-to-Serial adapter to connect a laptop to APC UPS' RS232 serial port. No signs of communication from the UPS. The laptop's OS has an auto-recognition feature that enables built-in power-down options if/when the UPS communicates its presence. Loop-back test of the serial adapter confirms data is going out and coming back, being displayed in a terminal program. (Local echo turned off.) Serial cable (between adapter & UPS) is the correct APC p/n (with unique pin assignments) for this application and model of UPS. Confirmed this with APC tech support. Tried power-cycling the UPS, and connecting the serial cable before & after. No joy. What options are left? This is a new (well, New, Old Stock) UPS and has not seen any use before I powered it up last week. Ideas? Mac PowerBook; OS X 10.4.11 APC Backup-Pro 650 (model BP650S); APC serial cable #940-0095B No-name USB-Serial adapter w/1.2.1r2 Prolific OS X driver Thanks. |
#2
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APC UPS won't talk to me
notme wrote:
[Re-posted with new subject and more appropriate NG's) Using a USB-to-Serial adapter to connect a laptop to APC UPS' RS232 serial port. No signs of communication from the UPS. The laptop's OS has an auto-recognition feature that enables built-in power-down options if/when the UPS communicates its presence. Loop-back test of the serial adapter confirms data is going out and coming back, being displayed in a terminal program. (Local echo turned off.) Serial cable (between adapter & UPS) is the correct APC p/n (with unique pin assignments) for this application and model of UPS. Confirmed this with APC tech support. Tried power-cycling the UPS, and connecting the serial cable before & after. No joy. What options are left? This is a new (well, New, Old Stock) UPS and has not seen any use before I powered it up last week. Ideas? Mac PowerBook; OS X 10.4.11 APC Backup-Pro 650 (model BP650S); APC serial cable #940-0095B No-name USB-Serial adapter w/1.2.1r2 Prolific OS X driver Thanks. So you know the cable is OK via APC support .AND. that loopback works OK. Loopback working OK also indicates that at least that part of the converter is working properly. So, take a small step of faith and assume the whole converter can work OK (ie: nothing wrong with it). Therefore, it is the softwa either the USB driver (most likely) or the application. |
#3
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
http://www.apc.com/resource/include/..._sku=BP650S&CF
ID=20442563&CFTOKEN=64258989 says this product is discontinued. Yes, I know. "Discontinued" does not mean obsolete. New models are introduced every month so as to keep that cash rollin' in. The "old" models still provide a service. (In my case for $0.) APC makes a version of Powerchute for MacOS X: http://www.apcmedia.com/salestools/J...SRLT_R0_EN.pdf According to e-mail correspondence with APC tech support, there is no Powerchute version compatible with the BP650S UPS model. They recommend using the built-in UPS monitoring features in Mac OS X. If you're up to "rolling your own", then that leaves you to reverse engineer the interface, then write a program that, when installed, runs on bootup (rather than just when someone logs in) and listens to the USB-Serial adapter for a signal that the power has gone out, then runs a graceful shutdown script. Not worth it, if that's the answer. I hope someone chimes in this discussion that they experienced this issue and found a way to make it work with the built-in OS's UPS monitoring features... Thanks. |
#4
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
So you know the cable is OK via APC support .AND. that loopback works OK.
Loopback working OK also indicates that at least that part of the converter is working properly. So, take a small step of faith and assume the whole converter can work OK (ie: nothing wrong with it). Therefore, it is the softwa either the USB driver (most likely) If data is going out and coming in, that means the USB driver works. Yes? or the application. It's not a stand-alone app. It's part of the System Preferences of Mac OS X. And Googling a bit, I've seen no evidence that the UPS monitoring feature has been an issue with other models of UPS. So, I suspect it's a non-standard spec of the APC UPS communication spec for this model. Worst case. N. |
#5
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
On Wed, 22 Jul 2009 23:17:52 -0700, notme wrote:
[Re-posted with new subject and more appropriate NG's) Using a USB-to-Serial adapter to connect a laptop to APC UPS' RS232 serial port. No signs of communication from the UPS. The laptop's OS has an auto-recognition feature that enables built-in power-down options if/when the UPS communicates its presence. Ideas? UPSes don't normally speak serial. More often, they simply connect two pins together, treating the serial port as a general-purpose I/O port. This won't work with a USB-to-serial converter, as there is no serial data to convert. |
#6
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
"notme" schreef in bericht ... [Re-posted with new subject and more appropriate NG's) Using a USB-to-Serial adapter to connect a laptop to APC UPS' RS232 serial port. No signs of communication from the UPS. The laptop's OS has an auto-recognition feature that enables built-in power-down options if/when the UPS communicates its presence. Loop-back test of the serial adapter confirms data is going out and coming back, being displayed in a terminal program. (Local echo turned off.) Serial cable (between adapter & UPS) is the correct APC p/n (with unique pin assignments) for this application and model of UPS. Confirmed this with APC tech support. Tried power-cycling the UPS, and connecting the serial cable before & after. No joy. What options are left? This is a new (well, New, Old Stock) UPS and has not seen any use before I powered it up last week. Ideas? Mac PowerBook; OS X 10.4.11 APC Backup-Pro 650 (model BP650S); APC serial cable #940-0095B No-name USB-Serial adapter w/1.2.1r2 Prolific OS X driver Thanks. FAIK APC UPS communication should be started by sending a question mark to it. petrus bitbyter |
#7
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
APC used to have an adapter cable. My guess is that a "standard"
USB-to-RS-232 cable is not likely to work. As another person said, I don't see the point for a notebook, even a desktop replacement. I assume the Mac has some system for automatic shutdown as the batteries are drained. (Windows does.) So, simply set it and the computer will shut down gracefully is power is lost. |
#8
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
In article l, "petrus bitbyter" writes:
"notme" schreef in bericht al-september.org... [Re-posted with new subject and more appropriate NG's) Using a USB-to-Serial adapter to connect a laptop to APC UPS' RS232 serial port. No signs of communication from the UPS. The laptop's OS has an auto-recognition feature that enables built-in power-down options if/when the UPS communicates its presence. Loop-back test of the serial adapter confirms data is going out and coming back, being displayed in a terminal program. (Local echo turned off.) Serial cable (between adapter & UPS) is the correct APC p/n (with unique pin assignments) for this application and model of UPS. Confirmed this with APC tech support. Tried power-cycling the UPS, and connecting the serial cable before & after. No joy. What options are left? This is a new (well, New, Old Stock) UPS and has not seen any use before I powered it up last week. Ideas? Mac PowerBook; OS X 10.4.11 APC Backup-Pro 650 (model BP650S); APC serial cable #940-0095B No-name USB-Serial adapter w/1.2.1r2 Prolific OS X driver Thanks. FAIK APC UPS communication should be started by sending a question mark to it. try: Y But the BackUPS don't use APC's Smart protocol. -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG http://www.quirkfactory.com/popart/asskey/eqn2.png "Well my son, life is like a beanstalk, isn't it?" |
#9
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
On Thu, 23 Jul 2009 04:12:01 -0700, William Sommerwerck wrote
(in article ): APC used to have an adapter cable. My guess is that a "standard" USB-to-RS-232 cable is not likely to work. I hope that's not so. In my communications with APC tech support they have not yet mentioned this requirement in my setup. Not that they're infallible, but I'd think that they would point out this obvious mistake in reply to my first e-mail describing my setup. As another person said, I don't see the point for a notebook, even a desktop replacement. I assume the Mac has some system for automatic shutdown as the batteries are drained. (Windows does.) So, simply set it and the computer will shut down gracefully is power is lost. The laptop is just a convenient test mule. The system that will benefit from the UPS' communication (hopefully) is a desktop system.. |
#10
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
On Thu, 23 Jul 2009 04:52:56 -0700, VAXman- @SendSpamHere.ORG wrote
(in article ): try: Y But the BackUPS don't use APC's Smart protocol. If I had an APC Smart-UPS with both RS232 and a Smart Slot, the serial port on the Smart-UPS would have a better chance of working with my USB-serial adapter? Thanks. |
#11
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
APC used to have an adapter cable. My guess is that a "standard"
USB-to-RS-232 cable is not likely to work. In my communications with APC tech support they have not yet mentioned this requirement in my setup. Not that they're infallible, but I'd think that they would point out this obvious mistake in reply to my first e-mail describing my setup. Well, they did it to me. I was told I needed a special cable, but it didn't work. Turned out that when I directly connected the standard cable to the computer (running W2K), the machine immediately recognized the UPC. |
#12
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
On Thu, 23 Jul 2009 03:45:10 -0700, petrus bitbyter wrote
(in article l): FAIK APC UPS communication should be started by sending a question mark to it. petrus bitbyter For troubleshooting purposes, what settings should the terminal program use? - VT100 or PC-ANSI? - High bit stripped? - Drop DTR on exit? - Auto line-feed? Thanks. |
#13
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
In article ,
Nobody wrote: On Wed, 22 Jul 2009 23:17:52 -0700, notme wrote: [Re-posted with new subject and more appropriate NG's) Using a USB-to-Serial adapter to connect a laptop to APC UPS' RS232 serial port. No signs of communication from the UPS. The laptop's OS has an auto-recognition feature that enables built-in power-down options if/when the UPS communicates its presence. Ideas? UPSes don't normally speak serial. More often, they simply connect two pins together, treating the serial port as a general-purpose I/O port. This won't work with a USB-to-serial converter, as there is no serial data to convert. Depends on if the converter supports the handshake lines. Some of them do. -- It's times like these which make me glad my bank is Dial-a-Mattress |
#14
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
On Thu, 23 Jul 2009 08:07:40 -0700, William Sommerwerck wrote
(in article ): Well, they did it to me. I was told I needed a special cable, but it didn't work. Turned out that when I directly connected the standard cable to the computer (running W2K), the machine immediately recognized the UPC. I tried both (with & without special cable). No joy. Thanks. |
#15
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
On Thu, 23 Jul 2009 08:07:40 -0700, William Sommerwerck wrote
(in article ): Well, they did it to me. I was told I needed a special cable, but it didn't work. Turned out that when I directly connected the standard cable to the computer (running W2K), the machine immediately recognized the UPC. APC Tech Support's final solution: Plug the UPS into a PC and see if it recognizes it. Being a Mac guy, don't know much about the Win world. Is there UPS communication & recognition features built into Win XP? Or do I need to have APC management software installed? Thanks. |
#16
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
Being a Mac guy, don't know much about the Win world. Is there
UPS communication & recognition features built into Win XP? Or do I need to have APC management software installed? If it's in W2K, it should also be in XP. The supplied cable has a J connector on one end, USB on the other. A few seconds after both ends are plugged in, the OS recognizes that a UPS (strictly speaking, an SPS) is connected and opens the Power Options Properties tab. Couldn't be simpler. There is no need to use APC's PowerChute, unless it has a specific feature no in the Windows OS. |
#18
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
On Thu, 23 Jul 2009 13:50:27 -0700, Andrew Rossmann wrote
(in article ): To add in: Many of the basic APC UPS's don't use true serial communications. They just use some of the control lines to signify power out, low battery, and to signal the UPS to do a shutdown. I don't know if it will work correctly through a USB-to-serial adapter. This has been said a few times here. Until I get a breakout box and look at a few of the lines on that connector to see if it's actually data or just pulling lines high or low, I won't know. My work computer has a BP650M with a self-made cable. It's just a standard 9-pin serial cable, but the UPS end is slightly rewired, and I think there is also a resistor. It's just using the stock Win2K support. I know that APC says that a standard serial cable won't work. I'm using their p/n cable that came with the UPS. Thanks for your input. |
#19
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APC UPS won't talk to me
I recommend you check out:
http://www.apcupsd.com/ I tried to get APC:s software to run on a Solaris x86 system, but gave up. apcupsd works fine, even through a prolific based usb-serial adapter. I haven't tried it on MacOS though. I have an APC Smart UPS 700, which speaks serial, not some status port wiggle. It does require a APC specific cable though. The link above contains references to simple commands that can be issued through a terminal emulator to verify that the communication works. |
#20
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
"notme" schreef in bericht ... On Thu, 23 Jul 2009 03:45:10 -0700, petrus bitbyter wrote (in article l): FAIK APC UPS communication should be started by sending a question mark to it. petrus bitbyter For troubleshooting purposes, what settings should the terminal program use? - VT100 or PC-ANSI? - High bit stripped? - Drop DTR on exit? - Auto line-feed? Thanks. First: I was mistaken about the question mark. You should send a Y. You should use a normal ANSI terminal set to: 2400,n,8,1 APC is known for using non-standard cables. The one I saw had the next connections: PC(DE9F) UPS(DE9M) 2------------------2 3------------------1 5------------------9 1-4 7-8 But there sure are other ones depending on the UPS-type. This one is for the APC Smart UPSs. No need to say there's no hardware handshake in this one. But... Does your UPS talk RS232 anyway? I seem to remember that BackupPro types are rather dumb things that only do some signaling i.e. using pin 2 to tell the UPS is on battery. Guess on the PC side this should be considered a "break" and that's all. petrus bitbyter |
#21
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APC UPS won't talk to me
On Thu, 23 Jul 2009 14:24:01 -0700, Thomas Tornblom wrote
(in article ): http://www.apcupsd.com/ Thanks for that. A great resource for APC owners who want to hack the device. The commands you speak of are commands sent through the apcupsd daemon, not thorough a terminal program. Building the daemon for OS X and installing it is a (to me) monumental task. But I think joining the support mailing list could prove helpful. Thanks again. |
#22
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
On Thu, 23 Jul 2009 14:24:01 -0700, Thomas Tornblom wrote
(in article ): http://www.apcupsd.com/ This site has much information about communication with the APC UPS's. This is a diagram of the cable that came with my Backup-Pro UPS 650 (model BP650S): APC Part# - 940-0095B Signal Computer UPS DB9F DB9M DTR 4 ----* CTS 8 ----| DSR 6 ----| DCD 1 ----* GND 5 ---------------*---- 4 Ground | *---- 9 Common RI 9 ----* | RxD 2 ----*--------------- 2 On Battery TxD 3 ----------[####]---- 1 Kill UPS Power 4.7K ohm Apparently it uses voltage-level signaling not serial communication. But I see no reason this won't work via a USB-serial adapter. When the RxD or TxD line is brought low, a bit is set or cleared in the buffer in the USB-serial driver. It's a whole other story whether OS X will recognize such signals. Why wouldn't this work with the USB-serial adapter? Thanks. |
#23
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
notme wrote:
So you know the cable is OK via APC support .AND. that loopback works OK. Loopback working OK also indicates that at least that part of the converter is working properly. So, take a small step of faith and assume the whole converter can work OK (ie: nothing wrong with it). Therefore, it is the softwa either the USB driver (most likely) If data is going out and coming in, that means the USB driver works. Yes? ** Good point; YES would be the logical conclusion. or the application. It's not a stand-alone app. It's part of the System Preferences of Mac OS X. And Googling a bit, I've seen no evidence that the UPS monitoring feature has been an issue with other models of UPS. So, I suspect it's a non-standard spec of the APC UPS communication spec for this model. Worst case. ** Seems that is what is left, Mr. Occam. N. |
#24
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
In article , Andrew Rossmann writes:
In article , says... [Re-posted with new subject and more appropriate NG's) Using a USB-to-Serial adapter to connect a laptop to APC UPS' RS232 serial port. No signs of communication from the UPS. The laptop's OS has an auto-recognition feature that enables built-in power-down options if/when the UPS communicates its presence. To add in: Many of the basic APC UPS's don't use true serial communications. They just use some of the control lines to signify power out, low battery, and to signal the UPS to do a shutdown. I don't know if it will work correctly through a USB-to-serial adapter. My work computer has a BP650M with a self-made cable. It's just a standard 9-pin serial cable, but the UPS end is slightly rewired, and I think there is also a resistor. It's just using the stock Win2K support. That's correct. The basic model simply toggle the equivalent of DTR high or log to signal that the UPS is or is not providing power from battery. An AC UPS that speaks their (not so incredibly) "Smart" prototcol, namely the SmartUPS and more expensive APC UPS options, uses a serial cable that is wired: APC UPS 1 == 3 2 == 2 9 == 5 In fact, if you plug in a standard, full-signal, 9 pin cable to both the APC and CPU, you run the risk of powering down the APC real fast. FWIW, I sell an APC US solution in the OpenVMS space. I have seen this communications problem with APC UPSs all too many times. -- VAXman- A Bored Certified VMS Kernel Mode Hacker VAXman(at)TMESIS(dot)ORG http://www.quirkfactory.com/popart/asskey/eqn2.png "Well my son, life is like a beanstalk, isn't it?" |
#25
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
On 2009-07-23, Nobody wrote:
On Wed, 22 Jul 2009 23:17:52 -0700, notme wrote: [Re-posted with new subject and more appropriate NG's) Using a USB-to-Serial adapter to connect a laptop to APC UPS' RS232 serial port. No signs of communication from the UPS. The laptop's OS has an auto-recognition feature that enables built-in power-down options if/when the UPS communicates its presence. Ideas? UPSes don't normally speak serial. More often, they simply connect two pins together, treating the serial port as a general-purpose I/O port. This won't work with a USB-to-serial converter, as there is no serial data to convert. yeah it will, usb-to-serial adaptors duplicate the same modem control pins and signals, applications that don't do direct IO port access will work just fine on usb-serial adaptors. I did that myself last month. |
#26
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
On 24 Jul, 05:09, notme wrote:
Apparently it uses voltage-level signaling not serial communication. But I see no reason this won't work via a USB-serial adapter. When the RxD or TxD line is brought low, a bit is set or cleared in the buffer in the USB-serial driver. It's a whole other story whether OS X will recognize such signals. Why wouldn't this work with the USB-serial adapter? These converters are known to cause trouble if used with anything other than standard terminal communication. They might be designed for data transfer only or they might add a delay in the signals that causes havoc. Anyway they were useless to use chip programmers on laptops without serial port. |
#27
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
On Thu, 23 Jul 2009 11:43:34 +0100, Nobody wrote:
On Wed, 22 Jul 2009 23:17:52 -0700, notme wrote: [Re-posted with new subject and more appropriate NG's) Using a USB-to-Serial adapter to connect a laptop to APC UPS' RS232 serial port. No signs of communication from the UPS. The laptop's OS has an auto-recognition feature that enables built-in power-down options if/when the UPS communicates its presence. Ideas? UPSes don't normally speak serial. More often, they simply connect two pins together, treating the serial port as a general-purpose I/O port. This won't work with a USB-to-serial converter, as there is no serial data to convert. I have seen UPSs that talk contact closures, EIA-232, EIA-485, and even Ethernet. It varies by make model and options. I have seen them in power ranges from 50 W to 500,000 W with appropriate VA and surge ratings. |
#28
Posted to sci.electronics.repair,comp.sys.mac.system,sci.electronics.design,sci.electronics.equipment
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APC UPS won't talk to me
On Thu, 23 Jul 2009 20:09:16 -0700, notme wrote:
Apparently it uses voltage-level signaling not serial communication. But I see no reason this won't work via a USB-serial adapter. When the RxD or TxD line is brought low, a bit is set or cleared in the buffer in the USB-serial driver. A USB-to-serial-adaptor is not a DAQ interface. It doesn't simply send a stream of pin states or state-change events directly to the host. A typical USB-to-serial adaptor[1] will expect a sequence consisting of a start bit, 8 data bits, an optional parity bit and 1 or 2 stop bits, all occurring at the configured (or auto-detected) baud rate. [1] CDC, ACM = Communication Device Class, Abstract Control Model. When it sees such a signal (IOW, when the UART says "a byte has been received"), it will queue the the received byte to be sent to the host. It may also inform the host if the control lines (DCD, DSR, RI) change, but this feature (SERIAL_STATE notification) is optional. Based upon your wiring diagram, if you can find a USB-to-serial adaptor which supports the Ring Indicator (RI) line, you should be okay. Or if you can find one which supports DSR or DCD, you can make your own cable which uses this line instead. You may have better luck with DSR or DCD. RI is the least useful signal, as you can just have the modem driver listen for a "RING" response from the modem. If the RS-232 driver is 4-in-4-out (e.g. MAX238), it's likely that RI is the one which will be ignored. Also, note that you can't directly query the state of CTS (the device just NAKs Tx packets if the Tx buffer is full), so if the RS-232 driver is 2-in-2-out (e.g. MAX232), you're out of luck, as none of DCD, DSR or RI will be monitored. FWIW, the USB CDC specification is at: http://www.usb.org/developers/devcla...s/usbcdc11.pdf |
#29
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APC UPS won't talk to me
do you have PowerChute installed??????
I had this problem on a windows system. I think it had to do with a setting in Powerchute OR in the UPS interface settings of windows. There was a place to set a rising or falling signal - either pos or neg logic. if the comm is working I suspect this is the issue. I think the OS just looks for a logic change and runs the shutdown from there. The UPS doesn't actually send code to the OS just a logic change. Windows shows an APC UPS attached in device manager. If MAC has a similar function it should show that to otherwise it won't know what to do with the signal. It was a long time ago and memory is foggy so take it as a hint. |
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