Power sources are different.
1) trike uses a 12V to 5V "cigar lighter" adaptor. This has three USB sockets for output, and is putting out a max of 6.6 amps, up to 2.2 amps per socket. Lead is a meter long "flat ribbon" type from eBay.
2) at home I'm using an Apple mains power adapter putting out up to 5v at a max of 2.5 amps. The lead is 30cm one borrowed from a mobile phone 14,000 mAhr power pack.
is more than 2 amps needed? Of course, these are just the declared figures by the maker/seller of these things, but the point is neither seems to solve the problem. All very odd.
I was concerned that the 8.4 iOS would cause issues? But you didn't mention it.....
Hi Paul,
I had been holding off from taking the 8.4 update, and was unnerved by your comments :-|
I updated this morning, and then took a 1 hour commute from Coventry down to Oxford with PilotAware in my car.
I got no dropouts and saw lots of traffic.
Hmmmmm, so ...
The (mobile) power supply I am using is also a 2.1A AUX as you describe.
Regarding power, I have measured PilotAware drawing Approx 750mA without the ARF, so factor in the ARF as well
which is approx 350mA (short bursts of 1 millisecond every 2 seconds), and you are looking at a requirement of 1.1A
Question: did you have anything else connected to the other USB ports during your flight ?
I have found when I plug my iPhone 6 Plus into the second port of the 2.1a charger, the charger is overloaded, and drops
out for 5 seconds.
This also means any other connections drop out alos, I have observed PilotAware constantly rebooting as it had its
power cut due to my iPhone 6 plus, can you provide a reference to the charger you are using and could this be a similar
scenario ?
The Power cable I am using is now a dedicated PI cable, I have found issues with
lots of standard USB cables, they simply have too much voltage drop from one end to the other.
On one of my cables I measured 5.25v at cable input, and just over 4.1v at the input to the PI - that is a killer !
here is a reference for the Pi Switchable similar to the one I am using
http://www.ebay.co.uk/itm/USB-to-Micro-USB-Power-Cable-Charger-with-ON-OFF-Switch-for-Raspberry-Pi-Android-/131567044246?hash=item1ea201c696To be honest the power source issue is a minefield, in the case of the PI, we are only interested in power and not data.
so we need good quality USB cables for the power, I have read online you really want something at 20AWG,
and a lot of cables are much poorer than this at ratings such as 28AWG (
https://en.wikipedia.org/wiki/American_wire_gauge)
Would really like to get to the bottom of your issues.
Thx
Lee