http://forums.leaflabs.com/topic.php?id=1925 A place to share, learn, and grow... en-US Fri, 22 Jan 2016 00:13:55 +0000 http://bbpress.org/?v=1.0.2 q http://forums.leaflabs.com/search.php http://forums.leaflabs.com/topic.php?id=1925#post-11625 Sun, 08 Jul 2012 11:32:18 +0000 gbulmer 11625@http://forums.leaflabs.com/ <p>okie - I had skimmed that manual initially, but had only noticed remote DTR, but reading it again, it looks like both are available. Cheers! </p> <p>I have a C program to exercise the serial ports ioctl's.<br /> It would be handy if Python worked. A friend has found an ioclt bug which might be in Node.js. So this level of signal can be very frustrating, and almost impossible to debug without a storage scope or USB sniffer. DTrace on the Mac is very useful for debugging too. </p> http://forums.leaflabs.com/topic.php?id=1925#post-11611 Fri, 06 Jul 2012 11:54:43 +0000 okie 11611@http://forums.leaflabs.com/ <p>gbulmer, I just noticed that this other RN-41 breakout board from Sparkfun looks like it has DTR broken out:<br /> <a href="http://www.sparkfun.com/products/10559" rel="nofollow">http://www.sparkfun.com/products/10559</a></p> <p>I once did the thing I think you're trying to do (communicate with, reset, and program a microcontroller through a UART over Bluetooth). As a side note, I recall that, at the time, the Python Bluetooth packages didn't include support to toggle DTR and Bluez support was buggy. Do you know if this has changed? I ended up using the RN-41/RN-42 GPIOs.</p> <p>In the first 60 seconds after powering up or reseting the RN-41/RN-42, you can enter "Command Mode" by connecting to it over a Bluetooth serial connection (or any time through hard-wired UART) and sending it the character string "$$$". Once in command mode, you can change the 60 second window to be infinite so that you can enter Command Mode any time over a Bluetooth serial connection. If your "regular data" might include "$$$", from Command Mode, you can make the special "$$$" string something else. You can do all sorts of things from Command Mode, including toggling GPIOs. For example, the following commands do these things:</p> <p>"S@,8080" sets GPIO-7 to an output<br /> "S&amp;,8080" drives GPIO-7 high<br /> "S&amp;,8000" drives GPIO-7 low</p> <p>To exit Command Mode, you send the character string "---".</p> <p>This is all in the Advanced User Manual, and it's a recommended read (it's mind-opening to see all the things you can do):<br /> <a href="http://www.rovingnetworks.com/resources/download/47/Advanced_User_Manual" rel="nofollow">http://www.rovingnetworks.com/resources/download/47/Advanced_User_Manual</a> </p> http://forums.leaflabs.com/topic.php?id=1925#post-11490 Mon, 02 Jul 2012 08:25:18 +0000 gbulmer 11490@http://forums.leaflabs.com/ <p>okie "I think you may be able to toggle other GPIOs by sending the modules certain commands."</p> <p>Interesting idea! I had a look at the RN-41 page (<a href="http://www.rovingnetworks.com/products/RN_41)" rel="nofollow">http://www.rovingnetworks.com/products/RN_41)</a>, and poked through the manuals, but I couldn't see anything about that except in the HID manual. I *think* I want to use the bluetooth device as a serial device, yes? </p> http://forums.leaflabs.com/topic.php?id=1925#post-11424 Wed, 27 Jun 2012 15:31:29 +0000 okie 11424@http://forums.leaflabs.com/ <p>gbulmer, if it doesn't have to be triggered by a DTR signal, I think you may be able to toggle other GPIOs by sending the modules certain commands. </p> http://forums.leaflabs.com/topic.php?id=1925#post-11370 Mon, 25 Jun 2012 03:07:31 +0000 crenn 11370@http://forums.leaflabs.com/ <p>This isn't quite what you're looking for in terms of pin out, but may be of some use:<br /> <a href="http://www.seeedstudio.com/depot/bluetooth-bee-p-598.html?cPath=139_142" rel="nofollow">http://www.seeedstudio.com/depot/bluetooth-bee-p-598.html?cPath=139_142</a> </p> http://forums.leaflabs.com/topic.php?id=1925#post-11362 Sun, 24 Jun 2012 20:05:24 +0000 gbulmer 11362@http://forums.leaflabs.com/ <p>okie - thanks for looking, but I believe the RN-41 doesn't expose DTR. </p> <p>There is a pin which I think can trigger a remote DTR, the datasheet says:<br /> 33 - GPIO10 I/O (remote DTR signal) - Input to RN-41 with weak pulldown</p> <p>but I want an output which is activated by a remote DTR so that it can be tied to nRESET, and enable the host PC to do a remote reset to make uploading easier. </p> http://forums.leaflabs.com/topic.php?id=1925#post-11358 Sat, 23 Jun 2012 16:28:15 +0000 okie 11358@http://forums.leaflabs.com/ <p>Oops, you're correct, those boards don't break out DTR. This one does, and it has the same module, the RN-41:</p> <p><a href="http://www.sparkfun.com/products/10559" rel="nofollow">http://www.sparkfun.com/products/10559</a></p> <p>The Sparkfun breakout board is a little pricey. If you're needing more than a couple, I would buy the units raw straight from Roving Networks. I've contacted them before for quotes with good results.</p> <p>By the way, the main difference between the RN-41 and RN-42 is that the RN-41 is higher power and communicates over larger distances. They are pin compatible. </p> http://forums.leaflabs.com/topic.php?id=1925#post-11331 Wed, 20 Jun 2012 17:37:28 +0000 gbulmer 11331@http://forums.leaflabs.com/ <p>okie - I looked at those parts, and AFAICT they do not have DTR out. Is that correct?</p> <p>The data sheet says "33 GPIO10 I/O (remote DTR signal) <strong>Input</strong> to RN-41 with weak pulldown" </p> http://forums.leaflabs.com/topic.php?id=1925#post-11330 Wed, 20 Jun 2012 13:58:30 +0000 okie 11330@http://forums.leaflabs.com/ <p>I'd recommend the Bluetooth Modem - BlueSMiRF Gold or Silver from Sparkfun:<br /> <a href="http://www.sparkfun.com/products/10268" rel="nofollow">http://www.sparkfun.com/products/10268</a><br /> <a href="http://www.sparkfun.com/products/10269" rel="nofollow">http://www.sparkfun.com/products/10269</a></p> <p>I've used both of them. One uses the RN-41 module and the other uses the RN-42, which are both available from many distributors and Roving Networks. </p> http://forums.leaflabs.com/topic.php?id=1925#post-11318 Tue, 19 Jun 2012 07:44:58 +0000 gbulmer 11318@http://forums.leaflabs.com/ <p>I am looking to use bluetooth serial.<br /> I intend to use it as both a communication path, and also for program upload from my Mac.<br /> I'd eventually use it for comms to e.g. an Android phone, but that isn't important at this stage.</p> <p>I want a serial bluetooth module that 'just works'; plug it in to Rx/Tx and power, and it works (probably defaults to 9600 baud).<br /> I want one on a 'breakout board' so that I can just plug in a 0.1" pitch header, without having to make my own PCB.</p> <p>I'd prefer a bluetooth serial (USART) module which breaks out the DTR signal, which I'd tie to RESET to make remote upload a bit easier.<br /> I'd prefer a module which supports, at least 115200baud.</p> <p>I'd prefer one from a consistent source in case I want more in the future.<br /> I'd prefer one that uses an SMD module which is also available, in case I want to integrate it onto the PCB in the future.</p> <p>Can anyone recommend a bluetooth module that satisfies most of that list of requirements? </p>