BMS Shed Timer - Hotspot in Accessory Mode

[Cruachan]

Hello all,

I've been interested in testing out the performance of the Wifi hotspot and comparing it against my mobile phone. I've got the MMB Multimedia box too, and was thinking it may be nice to have it simply work with the Bronco and not my mobile phone. The problem is, the hotspot only seems to work when the car power is in the "on" position. I'd like it to work in the "accessory" position. I can change the accessory timeout, but I believe the ability to run the wifi hotspot in accessory mode is attached to the "BMS Shed Timer" setting. I found an F150 thread where the owner was able to do this. So far, I'm not sure there is any other way but would be happy to know.

So, according to the F150 thread, you need to adjust the 726-05-02 setting as follows:
xxx* xxxx xxxx BMS Shed Timer Enable Cfg: 0=Disable, 1=Enable

I've found another reference online that shows the following:
0=ACC, 1=BMS, 2=None

My FE shows the following value:
726-05-02: 01D4 C00C 0CE1 (xxx* showing a 4??)

I'm willing to do a backup and try it... but I'd love for someone with more experience shed some light before I try. According to the F150 thread here, it does exactly what I'm looking for: https://www.f150forum.com/f118/keep-wifi-hotspot-active-when-truck-off-410773/index5/

Basically, the point is that when you have the power on, many of the systems are online and you're going to be draining the battery much faster than normal... perhaps that's the same with the setting above changed... I'm not sure. With that said, if anyone knows of a way to enable hotspot in accessory mode, I'm all ears. Just to be clear, I'm not looking to power it with the car off.

Thanks for advice if you've got it

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[mini4mw]

Did you ever find anything here? I'm also looking at that timer, but to keep the electric brake boost active during flat towing behind RV. It also seems to shutdown after 45m:
https://www.bronco6g.com/forum/thre...-brake-bms-time-out-nthsa-claim.36496/page-15

I pulled 6 VINs on Broncos for sale and they all have 4 set for this value. I can't find a definition for 4 either.

 

[Cruachan]

Did you ever find anything here? I'm also looking at that timer, but to keep the electric brake boost active during flat towing behind RV. It also seems to shutdown after 45m:
https://www.bronco6g.com/forum/thre...-brake-bms-time-out-nthsa-claim.36496/page-15

I pulled 6 VINs on Broncos for sale and they all have 4 set for this value. I can't find a definition for 4 either.

Sadly, I'm behind on my testing for this... wanted to do it a few weeks ago. But I still plan on trying it. FWIW, the first thing I'll do is set the accessory power timeout (which is a known setting if I remember correctly), then I'll move onto the wifi hotspot enabled in accessory mode.

I will update the thread as soon as I test.

 

[grtharris]

Cruachan you are looking at the wrong spreadsheet. Should be 2021-22 F150. Tried to send the link and it posted the whole thing.

 

[mini4mw]

Here's the number/config you want. attached is the full sheet. It should work for any Sync4 Ford.

				Shed_Timer_Enable_Cfg (STEC)
726-07-02	xxxx	xxxx	**--	00 =	STEC DISABLE		01 =	STEC ENABLE

 

[grtharris]

Cruachan, are you saying the hot spot works is ACC mode until the power is shed?
If that is the issue do as mini4mw showed an disable the STEC.
We are working on a towing issue and I just did it and the radio played for over an hour in the ACC mode.

 

[mini4mw]

FYI, while the one above turns off the timer, you may not want to do that. There is another value that will save you from killing the battery, a low battery SOC (state of charge) that will/should engage before battery is dead:

				Shed_LowSOC_Enable_Cfg (SLSOCEC)
726-07-02	xxxx	xx**	xx--	00 =	SLSOCEC DISABLE		01 =	SLSOCEC ENABLE

This one should be the timer for the shed process. We haven't tested it, but in ACC mode power turns off in 30m, which is what the default value is and calculated value for these addresses. Increasing the time will get you over 30m, but still let you control it so battery power is preserved rather than wide open with the timer disabled.

726-08-01	xxxx	xxxx	**--	Time_LSoff_Cfg (TLSC) • Seconds = Hex2Dec(********) • Range: 0 - 36000
726-08-02	****	**xx	xx--	Time_LSoff_Cfg (TLSC) • Seconds = Hex2Dec(********) • Range: 0 - 36000

You should have the below by default:
726-08-01 XXXX XXXX 00--
726-08-02 0007 08XX XX--

This equals 1800 (HEX2DEC("00000708")=1800 in Excel) which is 1800 sec /60 sec =30 min which is the timer the radio and Nav turned off. Once you know the time you want, you'd want to run dec2hex in Excel to find the proper value to place in this location. You can also double check your Excel foo on a website like:
https://www.binaryhexconverter.com/hex-to-decimal-converter

 

[Cruachan]

FYI, while the one above turns off the timer, you may not want to do that. There is another value that will save you from killing the battery, a low battery SOC (state of charge) that will/should engage before battery is dead:

				Shed_LowSOC_Enable_Cfg (SLSOCEC)
726-07-02	xxxx	xx**	xx--	00 =	SLSOCEC DISABLE		01 =	SLSOCEC ENABLE

This one should be the timer for the shed process. We haven't tested it, but in ACC mode power turns off in 30m, which is what the default value is and calculated value for these addresses. Increasing the time will get you over 30m, but still let you control it so battery power is preserved rather than wide open with the timer disabled.

726-08-01	xxxx	xxxx	**--	Time_LSoff_Cfg (TLSC) • Seconds = Hex2Dec(********) • Range: 0 - 36000
726-08-02	****	**xx	xx--	Time_LSoff_Cfg (TLSC) • Seconds = Hex2Dec(********) • Range: 0 - 36000

You should have the below by default:
726-08-01 XXXX XXXX 00--
726-08-02 0007 08XX XX--

This equals 1800 (HEX2DEC("00000708")=1800 in Excel) which is 1800 sec /60 sec =30 min which is the timer the radio and Nav turned off. Once you know the time you want, you'd want to run dec2hex in Excel to find the proper value to place in this location. You can also double check your Excel foo on a website like:
https://www.binaryhexconverter.com/hex-to-decimal-converter

Hey @mini4mw,

I finally jumped into the cockpit today and was going to tweak the above settings. You are right, my defaults were as you said:
726-08-01 XXXX XXXX 00-- (0000-1388-00D1)
726-08-02 0007 08XX XX-- (0007-0805-004B)

I was just about to make some changes, but paused when I wondered why there are only 2 programmable digits in 08-01, but 6 digits in 08-02. I totally get the decimal to hex, but in the default, 1800 dec is 708 hex (as you mention), but are we supposed to program 08-01 with 708 when it doesn't fit? Likely no.

So, when you check the F150 sheets (thanks for the updated attachment), it specifies the range for 08-01 as 0-36000, but I'm wondering if it is actually supposed to be a simple 00 for enabled, and 01 for disabled, rather than a dec to hex for the timer value. So, 08-01 for enable/disable and 08-02 for timer duration.

In summary, I decided to do a bit more searching for others that have toggled these settings. I know I could just try it and set the backup value if my engine explodes

To be honest, I could swear I saw a thread on 6G where someone had changed this setting, but I can't find it in a search.

Again, just to clarify, I've got two use cases:

1. Extend Accessory Mode: This is so I can enjoy music and such for a longer period of time. I've got the Multimedia box that allows me to watch Netflix on the screen... so, getting through a 30 minute episode of IT Crowd would be nice without toggling power. (https://www.carplaymmb.com/products/mmb-android-multimedia-video-box)
2. Use Ford's WiFi hotspot when in Accessory mode: by default, the Bronco's hotspot is only available when the car is powered on... when you turn the car off, it actually does keep working, but only for just a little while. I'd like to see if I could get the wifi hotspot to work by default in ACC mode. To be honest, I was just testing the hotspot, I'm not terribly happy with it so far.

Thanks to everyone's input... I'll hopefully get to testing it shortly after getting gun-shy today.

Cheers

Edit: I think I was thinking about this setting I had seen before... not quite the same:

Power Point Timeout Duration (in seconds converted to hex)

BdyCM

726-57-01

ABCD

xxxx

xx--

DeltaNu1142's power point timeout calculator

 

[BradKelly6]

Hey folks, I've been creeping the threads for a long time but finally joined (just for this thread!). Well, it's priority at the moment.

Anyway. I'm looking to run my dashcams 24/7. They'll pick up motion/impact etc and wake and record a minute before detection. What I really want access to is ability to log in anytime and get live view (and therefore, yell/communicate with a perp, etc).

Have a secondary battery, so that's not an issue. And this setup is currently working for me... albeit this: as you've mentioned, after 30 minutes or whatever, the vehicle sleeps. So I have onboard wifi, to make all of the above happen, but that shuts off when the vehicle sleeps.

Sorry, this is getting wordy. I'll leave it at this for now. I need a solution to have the onboard wifi stay on.
Currently - $10 plan with Bell via Ford (shares my current 300gig phone plan)
Probably need to: get Inseego mobile data device. Cons - TERRIBLE data plans. Pro - can have it run on secondary battery 24/7.
Option 2 - 2 simcards (front and rear camera) with mobile plans EACH. Also expensive.

I'm in Canada, our mobile options are the worst.
Appreciate any thoughts!

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