Making Nexus 7 2013 into a satnav

User209342

New member
Jan 31, 2016
2
0
0
Visit site
I made and old Nexus 7 tablet into a satnav for my parents car (they are not very tech savvy so everything should be as automatic as possible).
It is plugged in an in car charger which outputs 2.4A. I am using tasker to turn it on when the car is turned on and put it to sleep and in battery saving mode when the car is off (detected as no charging).

All in all it works well, but there are two issues for which I would appreciate suggestions.

1. Battery runs out after 2-3 days because while in use it is barely charging since it uses a lot of power and it is not charging when car is off. This would be solved if the device had quick charge but unfortunately it does not. I thought of using a powerbank with quick charge capacity, but then I lose capability of detecting that the car is on or off. Any suggestions would be welcome.

Ideally being able to fully power off when car turns off and to power on when it starts would probably solve the issue, something like wake on LAN for android, but this would also make 2. even worse...

2. It takes about 5 minutes after starting the ride for it to start seeing GPS satellites and giving location, not a big deal but if it could somehow retain connection to satellites this would be nice.

Any advice or tips would be much appreciated
 

User209342

New member
Jan 31, 2016
2
0
0
Visit site
I made and old Nexus 7 tablet into a satnav for my parents car (they are not very tech savvy so everything should be as automatic as possible).
It is plugged in an in car charger which outputs 2.4A. I am using tasker to turn it on when the car is turned on and put it to sleep and in battery saving mode when the car is off (detected as no charging).

All in all it works well, but there are two issues for which I would appreciate suggestions.

1. Battery runs out after 2-3 days because while in use it is barely charging since it uses a lot of power and it is not charging when car is off. This would be solved if the device had quick charge but unfortunately it does not. I thought of using a powerbank with quick charge capacity, but then I lose capability of detecting that the car is on or off. Any suggestions would be welcome.

Ideally being able to fully power off when car turns off and to power on when it starts would probably solve the issue, something like wake on LAN for android, but this would also make 2. even worse...

2. It takes about 5 minutes after starting the ride for it to start seeing GPS satellites and giving location, not a big deal but if it could somehow retain connection to satellites this would be nice.

Any advice or tips would be much appreciated

Here is a bit of a crazy potential solution.

Get a quick charge car charger (2-3$ from China) and an external battery (10000mAh should do, about 15$ from China) supporting quick charge recharge of the battery itself. Also get a wireless charger (2-3$).

Now the car has usb port plug nexus 7 into it. Plug the external battery into the car charger and connect the wireless charger to the battery and stick it to the back of the nexus.

Now when the car is on, nexus will use USB to charge/not lose charge from the car, and your battery is going to recharge itself, fast because of quick charge. When the car is off the wireless charger is going to charge the nexus from external battery and keep it from going dry for quite some time.


Will test if this works in a couple of days, I have all the ingredients laying around.
 
Last edited: