January 2016 - OvmsDev - Open Vehicles

OVMS logo
by Mark Webb-Johnson 06 Jun '17

06 Jun '17

We need to change the OVMS logo, to better reflect the vehicle independence. The existing logo is too much Tesla. Felix has kindly prepared a couple of options for us, attached below. My preference is for the one with the car outline (even though it retains a hint of Tesla), as it emphasizes the vehicle comms aspect. This is quite urgent, as the Teslive people are pushing for artwork. What do you guys/gals think? Regards, Mark

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OVMS v3
by Mastro Gippo 20 May '17

20 May '17

Hi all, I'd like to resurrect an old conversation. As we know, the current PIC is quickly running out of resources and maybe it's time to switch to a better platform. Two CAN buses are now desirable too. A microSD slot and direct USB connectivity wouldn't hurt either. I will probably have to design a similar hardware for myself, so I'd like to contribute to the OVMS by sharing the HW platform if you want; no strings attached of course, if you decide that there's no need for the upgrade, I'll keep on working on my project by myself! :) That said, I'd like to throw a few ideas to the table. - MCU: I'd like to use an STM32 micro. They seem to be emerging as the standard choice for diy ARM projects, and this offers a few interesting opportunities: -Programming it in c/c++ with the manufacturer CMSIS standard libraries (boring) -Programming it with the mbed.org SDK. Unfortunately no dev boards are available with dual CAN bus, but it will be easy to move to the correct micro of the same series once most of the software is ironed out on a dev board like the https://mbed.org/platforms/ST-Nucleo-F302R8/ -Programming it with an RTOS. NuttX would be my choice, as it's the one used in the Ardupilot Pixhawk platform, and I'd like to learn it. This would mean a steeper starting curve, but a lot of flexibility later as a lot of stuff is handled on the OS level (network stacks, SD card & filesystems, multitasking...). FreeRTOS is a nice option too. I'd like to use the STM32F405RG as it's the most similar to the one found on the Pixhawk, but of course I'm biased because of that, and that micro is quite overkill for the task. We can of course use a lower specced part and lose some RTOS fuctionality as long as it has 2 CAN buses. - MODEM: I have no experience in this field; is the SIM908 still a good choice or does anyone think that we should try new platforms? I like this, but I don't know if the price puts it out of budget: http://www.telit.com/telit/Pulsar/en_US.Store.display.1001./ge864-gps On the bright side, it can be programmed in python, so we can offload some of the work to the modem. This *could* allow us to free some space on the PIC, and keep that platform without changing MCU.. - Enclosure: I think that, even with the new MCU, we can still fit the old enclosure. Is that ok, or should we think about a more automotive-friendly one? Maybe waterproof for the twizy? And that's it. I think that the core SW developers should voice their opinion, as there is a lot of work to be done on that front. A huge problem will be keeping backwards compatibility to add features for the v2 users, so we should discuss about this too. Regards MG

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OVMS v2 stock / OVMS v3
by Mark Webb-Johnson 23 Feb '16

23 Feb '16

At the current rate, the batch we have of OVMS v2 modules will run out sometime in the next two months. Given the imminent shutdown of AT&T’s 2G network in USA, global re-allocation of 2G frequency bands, and the difficulties we are having obtaining the discontinued SIM908, it is decision time. Option #1: Re-order a large batch now, enough to last us into the new year, but with the risk that I’ll be personally stuck with them. Option #2: Just let the v2 modules run out, and move on with the plans for v3. Development on v2 is stagnating. Partly because the platform already does what we need it to do, and partly because we’re hitting the limits (no external connectivity other than GPRS, single CAN bus, no storage, limited RAM, flash, etc). The v3 plans have been on hold for some time, pending MBED OS release (first beta due this month) and the imminent release of hybrid processors such as that used in the UDOO Neo (due in September). We know what we want, but it is just too hard to pick a long-term platform when everything is on the cusp of changing. I really want a v3 module. Something with lots of RAM and Flash, wifi, bluetooth and cellular connectivity, multiple CAN bus support, and a rich development platform. Something we can all use as a platform for reverse engineering as well as end-user connectivity. I’ll do everything I can to make this a reality. Just not today. Too much is changing and we need to wait for things to stabilise. So, my gut feeling is to choose option #2. 2G GPRS is slowing dying, and building more on that platform just seems to be the wrong decision. This may leave us with several months of no platform stock, but I would rather people waited than spend $100 on something that is going to be obsolete/outdated. Kind of like buying an iPhone in August ;-) I don’t want to be stuck with the stock, and I don’t want people to buy a v2, only to have v3 come out a week later. Even if we started now, which we can’t, an optimistic schedule for the first end-user v3 units would be early 2016. So, tough decisions, but I really think option #2 is best. Bottom line is if you need v2 modules, order them now. If you are likely to need a large quantity for any upcoming projects, let me know. The SIM908 modules will be unavailable within the next month or so, and changing to another module is a PITA I don’t want to deal with (especially given the tight RAM and FLASH we have now). Regards, Mark.

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Open API
by Robert Sharpe 04 Feb '16

04 Feb '16

Hi, I am working on an EV route planning and navigation system that will need real time remote access to vehicle data. The most powerful approach would be to access all the different supported vehicles through a standard cloud base open api. My initial Googling has not shown an existing API but I know OVMS has a server. Can anyone tell me the location of a OVMS API definition? any other standard APIs (similar to Open Charge Point Protocol but for cars) Thanks in advance. Regards, Robert Sharpe (Managing Director) 07711 252971 Your Plugged-in Partner Evergreen Consulting is the trading name of Sharpe Consultants Ltd

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Alternative OVMS server
by Michael Balzer 23 Jan '16

23 Jan '16

FYI: I now operate an alternative OVMS server located in Europe (Strasbourg). The web frontend is a new development based on my own framework. It offers CSV download of historical records and a command shell (well, command line interface up to now, more to come). It also allows to subscribe to notifications by email. The server currently cannot send iOS notifications. => http://dexters-web.de/ Regards, Michael -- Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal Fon 02333 / 833 5735 * Handy 0176 / 206 989 26

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Possible Manufactoring fault last Batch
by Frank Demes 17 Jan '16

17 Jan '16

Hi Jérôme, could you check your OVMS for some missing soldering on the CAN chip? Gruß Frank > Am 06.12.2015 um 23:35 schrieb Jérôme Nicolle <jerome(a)ceriz.fr>: > > > > Le 06/12/2015 23:19, Michael Balzer a écrit : >> you need to switch on the Twizy to read >> registers. > > Just tried aboard my twizy, in INIT an ON state, couldn't get any reading. > > > -- > Jérôme Nicolle > 06 19 31 27 14 > _______________________________________________ > OvmsDev mailing list > OvmsDev(a)lists.teslaclub.hk > http://lists.teslaclub.hk/mailman/listinfo/ovmsdev

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Problem with sending CAN-message
by Geir Øyvind Vælidalo 12 Jan '16

12 Jan '16

Hi guys! I’m trying to send a can-messages. I copied the code from the Twizy-code, but it seems to fail for me. This is the code for sending: while (TXB0CONbits.TXREQ) {}; <— This one is ok TXB0CON = 0; TXB0SIDL = (ks_send_can.id & 0x07) << 5; TXB0SIDH = (ks_send_can.id >> 3); TXB0D0 = ks_send_can.byte[0]; TXB0D1 = ks_send_can.byte[1]; ... TXB0CON = 0b00001000; //Mark the message for sending while (TXB0CONbits.TXREQ) {}; <— Here it hangs TXREQ seems like it never gets cleared :-\ I have CAN Write enabled, so that is not the problem. Any ideas? Best regards, Geir

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Twizy beta 3.7.1
by Michael Balzer 05 Jan '16

05 Jan '16

Firmware: http://dexters-web.de/f/tw-beta/OVMS-Twizy-3.7.1.zip Note: this is still "beta" because I've got no info yet on the T45 SDO values missing and no results from a T45 current modification. Framework: - Fixed base64decode(), removed bug workarounds - base64encode(): return pointer to end of base64 string - New net_assert_caller(): check caller, fallback to REGPHONE - net_put RAM redirection now uses net_buf[] - Code cleanup, size and stack depth optimization - Fix: stack overflow/underflow flags cleared after crash - Perl diagmode clients: missing license info added Documentation: - Added developer hints on stack debugging and optimization Twizy 3.7.1: - New: CFG GET & SET: read/write complete profiles (base64 encoded) - CFG GET, SET, INFO & SAVE can be used "offline" (w/o SEVCON access) - CFG RESET n = reset EEPROM profile (w/o SEVCON access) - Code size and stack depth optimization - Frequent CFG errors reported human-readable - Button reset result notification now sent via IP/SMS - Client utility "cfgconv" to convert SEVCON profiles to/from base64 CFG GET/SET: CFG GET [n] get (download) profile base64 encoded CFG SET [n] [base64data] set (upload) profile from base64 encoded string with: n = 1..3: from EEPROM else: from current working set Hint: to avoid confusion with profile #0, don't use n=0 to address the working set. Better use "-" or "ws" (translates to 0), i.e. CFG GET - CFG SET - ... or CFG GET WS CFG SET WS ... Use the "cfgconv" utility to convert base64 to text or vice versa. "cfgconv" online: http://dexters-web.de/cfgconv Regards, Michael -- Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal Fon 02333 / 833 5735 * Handy 0176 / 206 989 26

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