[Ovmsdev] Brake light control (was Re: Prototyping expansion board)

Tamás Kovács kommykt at gmail.com
Sat Jun 1 12:15:03 HKT 2019 

Michael, the following wiring is ok if if i want to use the egpio8 port to
switch the brake lamp?


Inside OVMS Box:

   -

   Connect JP1 Pin10 (GEP7) to Pin12 (EGPIO_8) with jumper


In DA26 connector:

pin 24(+3.3) ----- [ 680 Ohms ] ---+--- [ Relay board IN ]


        |

                                pin 21 (EGPIO_8)

pin 9 ----- [Relay board DC+]

pin 8 ----- [Relay board DC-]

[Relay board COM] ----- Brake pedal switch one side

[Relay board NO] ----- Brake pedal switch other side

[image: IMG_0583.jpeg]


Tamás Kovács <kommykt at gmail.com> ezt írta (időpont: 2019. máj. 1., Sze,
16:06):

> Not now, I waiting for parts to finish it. I want to use a relay shield.
>
>
> Michael Balzer <dexter at expeedo.de> ezt írta (időpont: 2019. máj. 1., Sze,
> 15:37):
>
>> I've added the Twizy modification documentation to the user guide:
>>
>>
>> https://docs.google.com/document/d/16JrXR7rybp-18DrEoeh1rg6GqQT_jVBvhaXh2oEWRHw/edit#heading=h.xc9d76fq2q79
>>
>> Tamás, have you done the modification for the i-MiEV yet?
>>
>> Regards,
>> Michael
>>
>>
>> Am 27.04.19 um 17:25 schrieb Michael Balzer:
>>
>> Tamás,
>>
>> I've pushed an optimization for the speed processing, please note you now
>> need to call CalculateAcceleration() after your regular speed update. This
>> is necessary as the speed needs to be fed into the acceleration calculation
>> on every update, not just changes.
>>
>> I've also just added the relay to my Twizy as planned, it works nicely.
>> Just a little caveat: as Julien foretold, the SERV light turns on while the
>> regen brake light is active. So somehow the Twizy in fact does monitor the
>> brake light current and thus recognizes the hack. Doesn't matter too much
>> to me, I'll use the SERV light as my regen braking indicator ;-)
>>
>> Regards,
>> Michael
>>
>>
>> Am 22.04.19 um 21:41 schrieb Michael Balzer:
>>
>> Here's a simple web plugin to monitor acceleration levels and regen brake
>> signal generation:
>>
>>
>> https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/blob/master/vehicle/OVMS.V3/components/ovms_webserver/dev/regenmon.htm
>>
>>
>> Am 22.04.19 um 19:24 schrieb Tamás Kovács:
>>
>> Now I tested a little bit. Works fine, bright the led when recuperating.
>> But I look at the code and I not understand:
>>
>> accel = (speed - m_accel_refspeed) / (now - m_accel_reftime) * 1000;  //
>> smooth out road bumps & gear box backlash: accel =
>> (StdMetrics.ms_v_pos_acceleration->AsFloat() * m_accel_smoothing + accel) /
>> (m_accel_smoothing + 1);
>>
>> Use same variable, I think the first is unnecessary now.
>>
>>
>> Beg your pardon…?
>>
>> The first line calculates the momentary acceleration, the second sends
>> that value through a standard lowpass filter.
>>
>> If you mean it could be written in one line, you're right, but I prefer
>> readability.
>>
>> Regards,
>> Michael
>>
>>
>>
>>
>> Michael Balzer <dexter at expeedo.de> ezt írta (időpont: 2019. ápr. 22., H,
>> 11:13):
>>
>>> Pushed:
>>>
>>>
>>> https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/commit/b44d466580b6961ada5ae42500c3fea68cab0f8a
>>>
>>> - Vehicle framework: regenerative braking signal generation
>>>
>>>   New config:
>>>     vehicle [accel.smoothing] = 2.0     Acceleration smoothing factor
>>> (samples, 0 = none)
>>>     vehicle [brakelight.enable] = no    Regen brake light enable
>>>     vehicle [brakelight.port] = 1       … MAX7317 output port number (1,
>>> 3…9, default 1 = SW_12V)
>>>     vehicle [brakelight.on] = 1.3       … activation threshold
>>> (deceleration in m/s²)
>>>     vehicle [brakelight.off] = 0.7      … deactivation threshold
>>> (deceleration in m/s²)
>>>
>>>   New metrics:
>>>     v.p.acceleration    = acceleration/deceleration in m/s² derived from
>>> v.p.speed
>>>     v.e.regenbrake      = regenerative brake light state
>>>
>>> - Twizy web UI: regenerative braking signal configuration
>>>
>>>
>>> I've tested this using an LED on EGPIO_8, I'll do & document the Twizy
>>> hardware modification next weekend (if I receive my order in time…).
>>>
>>> @Tamás: to add the UI to the Mitsubishi code:
>>>
>>>
>>> https://github.com/openvehicles/Open-Vehicle-Monitoring-System-3/blob/master/vehicle/OVMS.V3/components/ovms_webserver/src/web_displays.cpp#L1127
>>>
>>> Regards,
>>> Michael
>>>
>>>
>>> Am 22.04.19 um 04:12 schrieb Mark Webb-Johnson:
>>>
>>> Yes, EGPIO1 had to be used for SN65 control so is not available for
>>> general use.
>>>
>>> Max7317 has 10 outputs (P0 .. P9):
>>>
>>>
>>>    - P0 MDM EN (controls modem power)
>>>    - P1 SW CTL (to BTS452 for EXT 12v power control)
>>>    - P2 EGPIO1 (SN65 transceiver power saving control)
>>>    - P3 EGPIO2 available for general use
>>>    - P4 EGPIO3 available for general use
>>>    - P5 EGPIO4 available for general use
>>>    - P6 EGPIO5 available for general use
>>>    - P7 EGPIO6 available for general use
>>>    - P8 EGPIO*7* available for general use
>>>    - P9 EGPIO*8* available for general use
>>>
>>>
>>> Regards, Mark
>>>
>>> On 22 Apr 2019, at 3:36 AM, Michael Balzer <dexter at expeedo.de> wrote:
>>>
>>> Mark,
>>>
>>> btw: is EGPIO_1 not free for general use? The esp32can SN65 seems to be
>>> controlled by that line.
>>>
>>> Regards,
>>> Michael
>>>
>>>
>>> Am 21.04.19 um 15:01 schrieb Mark Webb-Johnson:
>>>
>>> If changing vehicle.{h, cpp} framework, I suggest leaving a hook in to
>>> allow the vehicle module to override / supplement this. In particular, the
>>> brake light may be controllable via can message on some vehicles.
>>>
>>> You can look at the ext12v circuit to see how to control this.
>>>
>>> The ext12v system is a switchable 12v line already wired up and
>>> available on DA26 expansion. Would be trivial to put an external relay on
>>> that to switch brake lights.
>>>
>>> Regards, Mark.
>>>
>>> On 21 Apr 2019, at 1:32 AM, Tamás Kovács <kommykt at gmail.com> wrote:
>>>
>>> JP1 pin 1 (+3.3) ----- [ 680 Ohms ] ---+--- [ LED ] ----- pin 28 (GND)
>>>                                        |
>>>                                     pin 12 (EGPIO_8)
>>>
>>> I can connect a 680Ohm resistor first end to pin1, a second end to
>>> pin12, and the led positive side to pin12 and negative to pin28(gnd). Now I
>>> have only 470ohm resistor at home, I tested now with a 4V li-ion battery
>>> and my red led power is 4mA. I can use this (470Ohm) resistor or buy a
>>> 680Ohm.
>>> Tomorrow I remove the OVMS module from my car, and create some test, if
>>> the resistor (470Ohm) is OK.
>>> I used this calculator for led series resistor calculation (I used a red
>>> Led): http://ledcalc.com
>>>
>>> Michael Balzer <dexter at expeedo.de> ezt írta (időpont: 2019. ápr. 20.,
>>> Szo, 11:16):
>>>
>>>> Be aware the MAX71317 outputs are open drain, so you need a pull up
>>>> resistor to e.g. +3.3. According to the data sheet, the current should stay
>>>> below 6 mA.
>>>>
>>>> I've just done a quick test wiring like this:
>>>>
>>>> JP1 pin 1 (+3.3) ----- [ 680 Ohms ] ---+--- [ LED ] ----- pin 28 (GND)
>>>>                                        |
>>>>                                     pin 12 (EGPIO_8)
>>>>
>>>> Works as expected.
>>>>
>>>> Regards,
>>>> Michael
>>>>
>>>>
>>>> Am 19.04.19 um 09:59 schrieb Michael Balzer:
>>>>
>>>> Sure.
>>>>
>>>> You need to route an EGPIO line to the DA26 port. For a first test you
>>>> can add a simple jumper on expansion port pins 10/12 to route EGPIO_8 to
>>>> GEP_7 (= pin 21 on DA26).
>>>>
>>>> You should then be able to use the "egpio" command to test your LED.
>>>> EGPIO_1 … _8 labels correspond to MAX7317 ports 2 … 9, so to control
>>>> EGPIO_8, do:
>>>>
>>>> OVMS# egpio output 9 1  # EGPIO_8 on
>>>> OVMS# egpio output 9 0  # EGPIO_8 off
>>>>
>>>> (correct me if I'm wrong, Mark)
>>>>
>>>> I wasn't aware there are other cars in need of something like this.
>>>> I'll think about adding the logic as an option to the vehicle framework,
>>>> but I can send you some patch to test this on your i-MiEV/clone first.
>>>>
>>>> Regards,
>>>> Michael
>>>>
>>>>
>>>> Am 19.04.19 um 09:24 schrieb Tamás Kovács:
>>>>
>>>> I can add for testing a simple led (with resistor) , same as
>>>> SimpleConsole (twizy OVMS V2), to show car is recuperating, connected to
>>>> DA26 external expansion port?
>>>>
>>>> Michael Balzer <dexter at expeedo.de> ezt írta (időpont: 2019. ápr. 19.,
>>>> P, 9:17):
>>>>
>>>>> As the Mitsubishi code also reads battery current/power level from
>>>>> CAN, it would be trivial to add the same logic there.
>>>>>
>>>>>
>>>>> Am 19.04.19 um 06:52 schrieb Tamás Kovács:
>>>>>
>>>>> The Trio (Mitsubishi I-Miev and clones) does not activate the brake
>>>>> light on recuperation on 2105 and older models, if this is work is very
>>>>> impressive.
>>>>>
>>>>> Michael Balzer <dexter at expeedo.de> ezt írta (időpont: 2019. ápr. 18.,
>>>>> Cs, 23:08):
>>>>>
>>>>>> Mark,
>>>>>>
>>>>>> that looks very good. Not sure about general demand, but I think we
>>>>>> should have this to enable simple custom hardware I/O extensions.
>>>>>>
>>>>>> For the Twizy, I was thinking about adding logic to control the brake
>>>>>> light from the module. The Twizy does not activate the brake light on
>>>>>> recuperation, as that's normally (untuned) not very strong. But a tuned
>>>>>> Twizy allows one pedal driving, so needs this.
>>>>>>
>>>>>> Looking at our case I also think one custom extension board should
>>>>>> fit on top of the modem.
>>>>>>
>>>>>> Regards,
>>>>>> Michael
>>>>>>
>>>>>>
>>>>>> Am 18.04.19 um 02:36 schrieb Mark Webb-Johnson:
>>>>>>
>>>>>> It seems the attachments were messed up, so attaching again…
>>>>>>
>>>>>> Regards, Mark.
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> On 17 Apr 2019, at 10:07 PM, Mark Webb-Johnson <mark at webb-johnson.net>
>>>>>> wrote:
>>>>>>
>>>>>>
>>>>>> Design layout. Looks good to me, but open to suggestions...
>>>>>>
>>>>>>
>>>>>> We can make in sets of three PCBs, to keep prices down.
>>>>>>
>>>>>>
>>>>>> Regards, Mark
>>>>>>
>>>>>>
>>>>>> On 8 Apr 2019, at 12:05 PM, Mark Webb-Johnson <mark at webb-johnson.net>
>>>>>> wrote:
>>>>>>
>>>>>>
>>>>>> A kit of 5 PCBs + SIP edge connectors + mounting hardware,
>>>>>> unsoldered, would be about US$15 + shipping. About US$3/board set. With
>>>>>> shipping I don’t think this is worth doing with less than 3 or 5 boards per
>>>>>> kit.
>>>>>>
>>>>>> Would this be useful?
>>>>>>
>>>>>> Regards, Mark.
>>>>>>
>>>>>> On 7 Apr 2019, at 9:08 PM, Mark Webb-Johnson <mark at webb-johnson.net>
>>>>>> wrote:
>>>>>>
>>>>>> This is the closest we have today:
>>>>>>
>>>>>> <image1.jpeg>
>>>>>>
>>>>>> That is a bare modem board, with just the sip connectors. The
>>>>>> prototype above is a K-line transceiver.
>>>>>>
>>>>>> I think it would be trivial, and cheap, to make up what you show.
>>>>>> Perhaps just solder ready pads at 0.1” pitch, then the side sip connectors
>>>>>> wired to the first row of pads at each edge. Perhaps 5 PCBs in a kit, with
>>>>>> sip edge connectors, unsoldered, in a simple plastic bag.
>>>>>>
>>>>>> Does that sound like something useful? If so, I can ask the China
>>>>>> guys for some idea of pricing. If it is just the unsoldered pcbs + parts, I
>>>>>> don’t think it will be expensive.
>>>>>>
>>>>>> Regards, Mark
>>>>>>
>>>>>> On 7 Apr 2019, at 4:38 PM, Michael Balzer <dexter at expeedo.de> wrote:
>>>>>>
>>>>>> Mark,
>>>>>>
>>>>>> do you know of some kind of prototyping board available that fits to
>>>>>> our piggy back expansion layout?
>>>>>>
>>>>>> Something like this:
>>>>>> https://www.robotshop.com/de/de/cytron-arduino-proto-schild.html
>>>>>>
>>>>>> Regards,
>>>>>> Michael
>>>>>>
>>>>>>
>>>>>> Am 03.04.19 um 06:48 schrieb Mark Webb-Johnson:
>>>>>>
>>>>>>
>>>>>> If you have work to do on this DA26 expansion ports, this is pretty
>>>>>> cool and well built:
>>>>>>
>>>>>>
>>>>>> https://www.aliexpress.com/item/26-Pin-D-SUB-DB26-3-Rows-Serial-Parallel-Port-Serial-Shellless-Male-And-Female-Connector/32886738786.html?spm=a2g0s.9042311.0.0.20924c4dg34EEU
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> OvmsDev mailing listOvmsDev at lists.openvehicles.comhttp://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>>>>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>>>>>
>>>>>> _______________________________________________
>>>>>> OvmsDev mailing list
>>>>>> OvmsDev at lists.openvehicles.com
>>>>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>>>
>>>>>> _______________________________________________
>>>>>> OvmsDev mailing list
>>>>>> OvmsDev at lists.openvehicles.com
>>>>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> OvmsDev mailing list
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>>>>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
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>>>>>> _______________________________________________
>>>>>> OvmsDev mailing list
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>>>>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>>>
>>>>>>
>>>>>>
>>>>>> _______________________________________________
>>>>>> OvmsDev mailing listOvmsDev at lists.openvehicles.comhttp://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>>>
>>>>>>
>>>>>> --
>>>>>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>>>>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>>>>>
>>>>>> _______________________________________________
>>>>>> OvmsDev mailing list
>>>>>> OvmsDev at lists.openvehicles.com
>>>>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>>>
>>>>>
>>>>>
>>>>> --
>>>>> Üdvözlettel:
>>>>> Kovács Tamás
>>>>>
>>>>> _______________________________________________
>>>>> OvmsDev mailing listOvmsDev at lists.openvehicles.comhttp://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>>
>>>>>
>>>>> --
>>>>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>>>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>>>>
>>>>> _______________________________________________
>>>>> OvmsDev mailing list
>>>>> OvmsDev at lists.openvehicles.com
>>>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>>
>>>>
>>>>
>>>> --
>>>> Üdvözlettel:
>>>> Kovács Tamás
>>>>
>>>> _______________________________________________
>>>> OvmsDev mailing listOvmsDev at lists.openvehicles.comhttp://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>
>>>>
>>>> --
>>>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>>>
>>>>
>>>> _______________________________________________
>>>> OvmsDev mailing listOvmsDev at lists.openvehicles.comhttp://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>
>>>>
>>>> --
>>>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>>>
>>>> _______________________________________________
>>>> OvmsDev mailing list
>>>> OvmsDev at lists.openvehicles.com
>>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>>
>>>
>>>
>>> --
>>> Üdvözlettel:
>>> Kovács Tamás
>>> _______________________________________________
>>> OvmsDev mailing list
>>> OvmsDev at lists.openvehicles.com
>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>
>>>
>>>
>>> _______________________________________________
>>> OvmsDev mailing listOvmsDev at lists.openvehicles.comhttp://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>
>>>
>>> --
>>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>>
>>> _______________________________________________
>>> OvmsDev mailing list
>>> OvmsDev at lists.openvehicles.com
>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>
>>>
>>>
>>> _______________________________________________
>>> OvmsDev mailing listOvmsDev at lists.openvehicles.comhttp://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>
>>>
>>> --
>>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>>
>>> _______________________________________________
>>> OvmsDev mailing list
>>> OvmsDev at lists.openvehicles.com
>>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>>
>>
>>
>> --
>> Üdvözlettel:
>> Kovács Tamás
>>
>> _______________________________________________
>> OvmsDev mailing listOvmsDev at lists.openvehicles.comhttp://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>
>>
>> --
>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>
>>
>> _______________________________________________
>> OvmsDev mailing listOvmsDev at lists.openvehicles.comhttp://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>
>>
>> --
>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>
>>
>> _______________________________________________
>> OvmsDev mailing listOvmsDev at lists.openvehicles.comhttp://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>
>>
>> --
>> Michael Balzer * Helkenberger Weg 9 * D-58256 Ennepetal
>> Fon 02333 / 833 5735 * Handy 0176 / 206 989 26
>>
>> _______________________________________________
>> OvmsDev mailing list
>> OvmsDev at lists.openvehicles.com
>> http://lists.openvehicles.com/mailman/listinfo/ovmsdev
>>
>
>
> --
> Üdvözlettel:
> Kovács Tamás
>


-- 
Üdvözlettel:
Kovács Tamás
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