http://www.tibbo.com/kb/ 2010-09-06T14:06:02+04:00 http://www.tibbo.com/kb/ http://www.tibbo.com/kb/lib/images/favicon.ico text/html 2008-09-09T14:40:03+04:00 http://www.tibbo.com/kb/general/hardware/485_psu?rev=1220956803&do=diff Question: I tried to connect my device to your DS100B over RS485 (2m cable). I have strange results: * When connecting both devices to a single 12V adapter, communication over 485 does NOT work. * When connecting each device to its own adapter, communication over 485 starts working. * When connecting both devices to a single adapter, but using RS232 instead of RS485 it also works. text/html 2010-07-22T15:37:38+04:00 http://www.tibbo.com/kb/general/hardware/before_rma?rev=1279798658&do=diff Question: I think my hardware is malfunctioning. What should I do? Answer: About 50% of all “malfunctioning” devices returned to Tibbo actually have *no* hardware problems. Here is what to do when you suspect that your DS100/EM100 is defective. text/html 2010-05-10T12:13:49+04:00 http://www.tibbo.com/kb/general/hardware/coldupgrade?rev=1273479229&do=diff “Cold Upgrade” is a device feature which allows upgrading device firmware via the network even if incorrect firmware was previously loaded or if the firmware somehow became corrupted. This is easy to explain with an example: With a device not supporting Cold Upgrade: text/html 2010-02-22T15:29:25+04:00 http://www.tibbo.com/kb/general/hardware/con485?rev=1266841765&do=diff Question: How do I connect a DS100B to a GigaTMS Con485 device? Answer: The Con485 is a converter between RS232 and RS485 produced by GigaTMS. This article covers how to connect it to the DS100B for testing purposes. * First, set a baudrate on the Con485. For example, select 9600. * Make sure this baudrate is set also for the DS. This can be done in settings, or using on-the-fly commands when you open the connection. * Flow Control must be “Idle or Remote”, since there is no RTS/CTS in … text/html 2010-02-22T15:47:24+04:00 http://www.tibbo.com/kb/general/hardware/determining_point_of_failure?rev=1266842844&do=diff Question: My module / device server has been acting weird, is it broken? Answer: Frequently, the problems encountered are not caused by hardware failure of the module itself, it could be caused by firmware and setting related reasons (incorrect settings, incorrect connections, or corrupt firmwares) or power related reasons. Below are the suggested troubleshooting steps. text/html 2010-02-22T15:49:27+04:00 http://www.tibbo.com/kb/general/hardware/ds_dies?rev=1266842967&do=diff Question: I connect a DS to a power source and LAN, and configure it. All seems just fine, and things work properly. But then, after a few hours or days of work, suddenly the DS 'dies'. I can't see it in DS Manager, I can't ping it, and nothing seems to work all of a sudden. Or it works erratically -- sometimes works, sometimes doesn't. text/html 2010-02-22T15:51:59+04:00 http://www.tibbo.com/kb/general/hardware/hot_device?rev=1266843119&do=diff Question: When I connect the DS203 to a power source, it gets very very hot. Is it going to burn? Is it normal? Why is that? Answer: This is normal! DON'T PANIC. :) The only reason for this is that the DS203 is a 100BaseT device. 100BaseT Ethernet devices always get very hot -- and this is to be expected. text/html 2008-09-09T14:44:50+04:00 http://www.tibbo.com/kb/general/hardware/poe?rev=1220957090&do=diff Question: Are you planning to release any Ethernet modules that support power over Ethernet (POE), as defined by 802.1af specification? Answer: 802.1af is not a “communications” function, it is just a power supply. The only “link” between our EM modules and POE power supply is that they share the same RJ45 connector. If you want to build a device that supports POE you can use POE module supplied by Texas Instruments (or similar module from any other Manufacturer). text/html 2008-09-09T14:45:38+04:00 http://www.tibbo.com/kb/general/hardware/psu_non_regulated?rev=1220957138&do=diff Question: I got a Tibbo power supply which is rated for 12V. When I connected it and measure the voltage using a voltmeter, I get 17V! Is my PSU faulty? Will it burn the DS202 if I connect it? Answer: What you see is the PSU voltage when not under load. Once you connect the DS202 to the PSU, the voltage will decrease significantly and will reach around 12V. The PSU is not regulated because the DS202 contains an internal voltage regulator -- the DS202 can work in a wide voltage range, from ~9V t… text/html 2010-02-22T15:52:59+04:00 http://www.tibbo.com/kb/general/hardware/serial_upload?rev=1266843179&do=diff Question: How do I perform a serial upload of new (or old) firmware? Answer: Whenever you have a problem with either loading the wrong firmware or suspect that there are problems with the firmware which caused access problems, please try to upgrade the firmware through the serial port. This is our fail-safe port for dealing with firmware related problems. text/html 2008-09-09T14:48:24+04:00 http://www.tibbo.com/kb/general/hardware/switching_vs_linear?rev=1220957304&do=diff Question: Why is it important to specifically use a switching voltage regulator rather than a linear one? Using a switching regulator would add many components to my board and would increase cost by about $5. Answer: It is not ALWAYS important. Switching regulators save power in many cases. That is, they can transform one voltage into another much more efficiently. So-called linear regulators achieve the required output voltage by “slashing” the input one and literally dissipating excess into …