@Kit-Bishop @Lazar-Demin Thanks for your help. The setup is working very well.
I created a small python script that i start on boot and which monitors low battery and input power status powers the onion off before an empty battery would kill the onion hard:
https://gist.github.com/benjaminrau/1f6585591dad469aee4e0520677e91ac
I made use of the gpio wrapper one of the onioneers contributed:
https://community.onion.io/topic/40/simple-python-wrapper-and-demo
Cheers Ben
Like i expected.. with external antenna, placed far away (> 60cm) from onion the gps signal is good. Below 60cm the gps signal becomes weak or completely unable to find a fix.
What is causing this on the onion? Honestly, but that would be a desaster that the onion causes such big interferences!
Cheers Ben
Hi @Alan-Smith, i had the same problem. If would be open for a Software Serial also, if one knows an approach i would give it a try also.
Meantime i used a USB-to-TTL-converter with CP2102 chip - that works out of the box with the Omega and costs less than 5 dollar (providing no link because there are lots and i dont want to make advertising).
Cheers Ben
Hej @Kit-Bishop, thanks for your reply.
YOu are right that was kind of a logical conundrum combined with bad english and misunderstadings 
I cleared the situation now out for me and i am one step ahead.
As usual another blocker:
When connecting the LowBattery (LBO) output of the Adafruid PowerBoost to any GPIO on my Omega the LB Led on the module (also if it was off before) starts shining and the GPIO is logical HIGH, even when the LED was off before.
When i remove the cable from GPIO to LBO the LED is off again.
Tonight i will test the LBO with an Arduino (others in the internet report that the LBO is worked very well for them) but maybe in the meantime one has an idea why the LBO is high always when the cable is connected.
Cheers Ben
Maybe coming up with a dumb question but "How to power on the Omega after powering it off from within the os with halt command?"
My problem now is that i power the Omega off with my script mentioned above but i dont know how to power it on again when power source recovered. The problem is that the from the Omegas perspective the power source never disconnected so i would need to "send some power on signal with HIGH..."
Cheers Ben
@Kit-Bishop @Lazar-Demin Thanks for your help. The setup is working very well.
I created a small python script that i start on boot and which monitors low battery and input power status powers the onion off before an empty battery would kill the onion hard:
https://gist.github.com/benjaminrau/1f6585591dad469aee4e0520677e91ac
I made use of the gpio wrapper one of the onioneers contributed:
https://community.onion.io/topic/40/simple-python-wrapper-and-demo
Cheers Ben
@Lazar-Demin On which pins could i connect the 5V and Ground for input power when i dont want to use microusb cable. I tried the 5V pin on the expansion board but it doesnt work. Maybe i have to connect ground to one specific pin?
Hi there.
@Lazar-Demin Thanks for your reply also. I know about the Onion Battery pack, i backed it Unfortunately it is pretty delayed and my 3 month road trip starts in 3 weeks, which my Onion is going to track and create a timelapse from it... sorry that was OT.
The Adafruit Power Board has the USB Vin extracted on the board so you can use it as GPIO i think and when its low i know that the power supply has gone and can shutdown the onion safely.
Also there is a Low Power Pin that can be used for the same reason but you can run the Onion as long as possible on battery.
I will give it a try and switch to the Onion Battery Pack later... hopefully it has such Low Battery and "is power source connected" pins also.
Cheers Ben
Hi guys.
Been out for some days - thanks for the great contribution to this post.
One problem with battery packs seems to be that there is a short period where output is low when input connected /disconnected. I think this is because most battery packs switch from battery directly to Vin when there is input power.
This causes the Onion to crash but i need un-interrupted power also when input (car power jack) is connected / disconnected.
Also very important: I need to be able to monitor if power is delivered from battery or not because i need to shutdown the Onion before the battery pack is empty.
I found this: https://www.adafruit.com/products/1944
My technical english is not the best so may one be able to tell me if:
Cheers Ben
@Alan-Smith I think thats the way how you shot images with webcams - thats why i decided to use gphoto2 library to shot photos from a camera.
Well, that wont be an alternative for you if you need to take videos also. Anyway it may be worth to have a look on the library because some webcams are supported also:
http://www.gphoto.org/doc/remote/
https://community.onion.io/topic/612/remote-control-camera-with-gphoto2
Cheers Ben
Hi there.
Can somebody help me to build a battery fallback for my Onion.
The szenario:
I use my onion in the car, it captures photos while driving and creates together with some gps data a map.
So Onion is connected via usb adapter to the 12v jack of the car.
When i stop the car... the power is off. And mama told me that this isnt the way to shutdown a computer
So i thought about smth like connecting a 5v (usb) battery to some pins (i dont know which) and cut the connection to it with an relay that is controlled by input voltage on regular micro usb jack.
I would be really happy to get some help with this because this is definitely nothing i have knowledge about.
Cheers Ben
Like i expected.. with external antenna, placed far away (> 60cm) from onion the gps signal is good. Below 60cm the gps signal becomes weak or completely unable to find a fix.
What is causing this on the onion? Honestly, but that would be a desaster that the onion causes such big interferences!
Cheers Ben