I’m about to buy the VIM4. Intended use is in my car as the main “headunit”.
For this I need:
- working navigation (Google Maps and Waze) → Play Store Services needed.
- 5G / LTE
- GPS
- Wifi
- Bluetooth
- Audio output
- Microphone input
- FM Tuner (good to have)
- Backup camera support
- Display with touch input (which do you recommend for 16:9 6.55inch? → exact requirement)
What I wish to reach is a very fast bootup from 0 (few seconds), OR very low consumption sleep/hibernation mode. Is any of these available with the VIM4?
What do you think am I on the right track with VIM4 for my project? Please note I have built more than one carpcs in the past. I wouldn’t call myselft newbie in the project, but I’m new to Khadas.
@danergo ，
Your project sounds very interesting.
（1）working navigation (Google Maps and Waze) → Play Store Services needed.
（2）5G / LTE
（3）GPS
（4）Wifi
（5）Bluetooth
（6）Audio output
（7）Microphone input
（8）FM Tuner (good to have)
（9）Backup camera support
（10）Display with touch input
We can meet these requirements. However, VIM4 Android does not support quick startup.
If you apply VIM4 to your project, we will provide strong support.
Hi!
Thanks for confirming.
Regarding quick startup: I understand VIM4 is not supporting it. In my earlier setup I have used a smartphone (with battery and its thermal shutdown circuit removed - car can experience hot temperatures especially in summer), which also does not provide quick startup. I defeated this behavior by implementing 2 ‘startup modes’:
1.) Cold start: from 0. It takes minutes on the old phone (at least 3mins).
2.) Standby: same as when you turn your phone’s display off: when you ‘wake’ it up, its done instantly. During standby this old phone consumed very low current (few mA max).
Can I do this with VIM4? What are the current consumption values of the VIM4 with Android in active, idle and standby (if you have) mode?
Regarding 2,3,6,7,8,9,10: which interfaces would you recommend for these functions to utilize the VIM4 the most?
Important: I need standby mode with low consumption every hardware (2-10) should go down in this mode. Either by cutton their power or somehow else. Do you maybe have any idea for this?
Thank you!
@danergo ，
In order to better answer your questions and provide services. We hope to communicate through email.
Umderstood. Will mail you soon. Thank you!
Which email shall I write to?
@danergo ，
Sorry for the late reply. Due to the weekend, please send your requirements to the email address .
support@khadas.com
Thanks
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I sent email to this address 6 days ago without ANY reply. Im wondering why is it better communicating via email if you are not answering in a week’s time.
Forum topics are public so many people could use it for learning purposes. Email is private. It doesn’t bother me, but not getting replied does.
Please see that email box, I have resent it again now.
Thank you.
Hi @danergo ,
We couldn’t see it because it was identified as spam.I will support you on the forum later, so that more people can also learn。
1.) Cold start: from 0. It takes minutes on the old phone (at least 3mins).
===VIM4 cold start takes approximately 35 seconds
2.) Standby: same as when you turn your phone’s display off: when you ‘wake’ it up, its done instantly. During standby this old phone consumed very low current (few mA max).
===Just like our phones. Standby will turn off the peripheral power and enter low-power mode.
Can I do this with VIM4? What are the current consumption values of the VIM4 with Android in active, idle and standby (if you have) mode?
===VIM4 shutdown current 10.27mA, active state 806.33mA
Regarding 2,3,6,7,8,9,10: which interfaces would you recommend for these functions to utilize the VIM4 the most?
===please refer to the following link:
Important: I need standby mode with low consumption every hardware (2-10) should go down in this mode. Either by cutton their power or somehow else. Do you maybe have any idea for this?
===VIM4 has rich GPIO, which can be used to control the power supply of each hardware.
Nice, thank you!
With Android, correct?
Let’s start by adding display: I’m looking for FHD or 4K with touch sensing. I need quick response times (like on current phones’ touch input):
Would you recommend using hdmi out and usb (for touch sensing) or MIPI-DSI&TP?
Thank you!
@danergo ,
(1)With Android, correct?
YES
(2)We have official display accessories that support MIPI interface with 2K resolution and touch function.
We have official display accessories that support MIPI interface with 2K resolution and touch function.
Thank you!
(1) Thank you for confirming.
(2) Thank you. I have very strict requirement of display size: 6.55" with 16:9 aspect ratio. I believe your official screen is different from this requirement. In terms of response speed, would you recommend me finding vendors with HDMI & USB, or MIPI-DSI&TP?
Thank you!
@danergo ,
Sorry, we currently do not have any suppliers recommended to you.
If you find a suitable screen, it can also be used by modifying the SDK to adapt it.
Okay no worries. I dug myself into this topic and learnt MIPI is generally faster than HDMI.
However I wish placing VIM4 about 50-75cm far from the display.
I got some recommendations of using SerDes modules to put MIPI signals onto coax on VIM side and convert it back to MIPI on display side.
What do you think on this approach?
@danergo ,
Because VIM4 is approximately 50-75CM away from the display, I suggest using the HDMI interface directly.
1 Like
And USB for touch sensing?
@william.lin: in case I found a suitable (but bit bigger) display, is it possible to “shrink” the active screen size in your Android configuration? I.e I found a 7" display, but my frame is strictly manufactured to 6.44". In case Android is layed out on the full 7" display, I will not be able to see the navigation bar, and statusbar. Do you have configuration/solution for this?
Thank you!
@danergo ,
We have not implemented this aspect before. Our group evaluated that it is difficult to achieve this requirement.
Thank you! Is your Android open source? In that case I can modify it to support this screen trimming.
@danergo ,
Yes, our code is open source. Here is the download document.