<html><head><meta http-equiv="Content-Type" content="text/html charset=us-ascii"></head><body style="word-wrap: break-word; -webkit-nbsp-mode: space; -webkit-line-break: after-white-space; ">I'll try . It'll depend on space in the housing. I've got a few I've been playing with.<div><br></div><div>I like the ones that direct solder:</div><div><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;"><div><a href="http://www.fasttech.com/products/0/10004051/1292002-ti-cc2540-bluetooth-40-ble-2540-transparent-serial">http://www.fasttech.com/products/0/10004051/1292002-ti-cc2540-bluetooth-40-ble-2540-transparent-serial</a></div><div><a href="http://www.fasttech.com/products/0/10003385/1251502-jy-mcu-hc-06-bluetooth-transceiver-serial-communic">http://www.fasttech.com/products/0/10003385/1251502-jy-mcu-hc-06-bluetooth-transceiver-serial-communic</a></div></blockquote></div><div><br></div><div>But the plug-in ones may be better suited as they can be entirely optional:</div><div><blockquote style="margin: 0 0 0 40px; border: none; padding: 0px;"><div><a href="http://www.fasttech.com/products/0/10001791/1129201-jy-mcu-hc-06-bluetooth-wireless-serial-port-module">http://www.fasttech.com/products/0/10001791/1129201-jy-mcu-hc-06-bluetooth-wireless-serial-port-module</a></div></blockquote></div><div><br></div><div>Regards, Mark.</div><div><br><div><div>On 6 Sep, 2013, at 3:52 PM, Mastro Gippo <<a href="mailto:gipmad@gmail.com">gipmad@gmail.com</a>> wrote:</div><br class="Apple-interchange-newline"><blockquote type="cite">Just a quick request: there should be enough space on the pcb to add a<br>bluetooth module. Please add at least the footprint for<br>[<a href="http://www.ebay.it/sch/i.html?_odkw=hc-05&_sop=15&_osacat=0&_from=R40&LH_PrefLoc=2&_trksid=p2045573.m570.l1313&_nkw=hc-05+-74hc05&_sacat=0">http://www.ebay.it/sch/i.html?_odkw=hc-05&_sop=15&_osacat=0&_from=R40&LH_PrefLoc=2&_trksid=p2045573.m570.l1313&_nkw=hc-05+-74hc05&_sacat=0</a>]<br>This would add the need for an independent power supply, but as I<br>recall you were already planning to place the footprints on the pcb.<br>I found myself in need for a wireless connection a lot of times,<br>usually to get a quick log with my phone. For example, this weekend<br>I'm doing a few tests with a tesla model s and I'd love a more stealth<br>method to get the data.<br>About being stealth, I found myself using ELM327 adapters to get CAN<br>data more than a few times, but I have to include a lot of filtering<br>due to the slowness of the adapter. That said, the STN1170 is an<br>"elm327 on steroids", and may have enough horsepower to log unfiltered<br>can data, while being a very good diagnostic tool to interface with<br>Torque. <a href="http://batman.homelinux.com/blog/stn1170-bluetooth-obdii-adapter/">http://batman.homelinux.com/blog/stn1170-bluetooth-obdii-adapter/</a><br>I still have not tested it, but maybe will soon. Single chips are<br>available for 10$ in single quantities.<br><br>Regards<br>MG<br><br><br>2013/9/5 HONDA S-2000 <<a href="mailto:s2000@sounds.wa.com">s2000@sounds.wa.com</a>>:<br><blockquote type="cite">I like the MCP2551, but I don't think it's guaranteed to work without a 5V<br>boost regulator. The USB specifications are clear that the 4.5V minimum<br>needed is not always guaranteed to be present.<br><br>As for the crystal, it's all about the accuracy of the internal oscillator.<br>USB calls out a precision in the specification, and as long as you meet that<br>you're fine. Older chips had an internal oscillator that was not precise<br>enough. This newer PIC32MX796 has a 0.9% oscillator, meaning that it's<br>plenty accurate enough for USB. I trust Microchip, in that they don't claim<br>their internal oscillator will work for chips that can't do it, but this one<br>can.<br><br>That said, there's nothing wrong with putting the traces on the board (other<br>than the space they take up). I'm partial to smaller SMD parts like the ECS<br>ECS-120-20-30B-DU, but those are more expensive than the large canned<br>crystals.<br><br>Does the CAN spec (ISO-11898) say what the required precision is for the<br>clock?<br><br>The SN65HVD235 has a bus listen-only feature that seems like a really safe<br>option for a project like this. I imagine that the device will mostly be<br>listening to CAN messages and not attempting to inject potentially dangerous<br>messages into an unknown vehicle. Supposedly, the listen feature also helps<br>with autobaud.<br><br>Brian<br><br><br><br>On Sep 4, 2013, at 19:22, Mark Webb-Johnson wrote:<br><blockquote type="cite"><br>Looking at the wholesale pricing, and given that we have 5V already and<br>lots of experience with MCP2551, I think I'll stick with that for the<br>initial design and then see what the factory says.<br><br>At the moment, I'm trying to make a rough design using<br>PIC32MX795F512H+MCP2551 - DB9 at one end, USB at the other. No final<br>decision on microcontroller yet, but I just want to get something to the<br>factory to firm up estimates on what this is going to cost. I'll tell the<br>factory that the SN65HVD233 is an option for them, if it is easier/cheaper.<br><br>The PIC32 is completely overkill for this, and will most likely be 50% of<br>the BOM cost. But, I really want lots of RAM on this thing. If we drop RAM<br>requirement to 64KB, we can save a few bucks, but it really doesn't seem<br>worthwhile.<br><br>Regarding the oscillator, every design I've ever done uses an external<br>oscillator. I know the PICs (and others now) have internal FSCs, but am<br>concerned about timing accuracies for CAN and USB. The data sheet says the<br>internal FSC can be used for USB (and incidentally is always used for 48MHz<br>USB when in suspend mode). Anyone have any experience with this? My gut<br>feeling is to wire the board for an 8MHz external crystal (and two caps),<br>and then see if we can get it working reliably with that disabled. If we end<br>up not needing it, we can leave it unpopulated at manufacture time (saving a<br>buck).<br><br>Regards, Mark.<br><br>On 5 Sep, 2013, at 4:01 AM, HONDA S-2000 <<a href="mailto:s2000@sounds.wa.com">s2000@sounds.wa.com</a>> wrote:<br><blockquote type="cite"><br>The MCP2551 requires a minimum Vdd of 4.5V to ensure ISO-11898<br>specifications, but USB Vbus is only guaranteed to be 4.01V under certain<br>conditions like at the end of a bus-powered hub.<br></blockquote><br><br></blockquote>_______________________________________________<br>OvmsDev mailing list<br><a href="mailto:OvmsDev@lists.teslaclub.hk">OvmsDev@lists.teslaclub.hk</a><br>http://lists.teslaclub.hk/mailman/listinfo/ovmsdev<br></blockquote>_______________________________________________<br>OvmsDev mailing list<br><a href="mailto:OvmsDev@lists.teslaclub.hk">OvmsDev@lists.teslaclub.hk</a><br>http://lists.teslaclub.hk/mailman/listinfo/ovmsdev<br></blockquote></div><br></div></body></html>