Alexander,
Have a look at whether you can cannibalize the charging unit for the phone. On our tablet / ioio system (driving up to 21 relays - not all on at the same time, but does run 5+ relays at one time / 12 sensors) we spliced into the charging cable so that:
- phone charger still powers the phone directly,
- splice provides power to the ioio.
There is a potential risk with voltage / current draws competing between the two devices - but this has not caused a problem for us.
We use inexpensive tablets that have poor battery performance - they go flat within an hour or so of no charge. I expect a phone would draw less current than a tablet, so I expect you would have a little less trouble than we had initially.
Paul James
Water ReNu LLC. www.waterReNu.com
Dallas
Texas USA
---------- Original Message --------
Subject: device mode
From: Alexander Kirillov <[email protected]>
Date: Thu, June 11, 2015 8:19 am
To: [email protected]
Dear IOIO users:--
sorry if this has been asked before - I am new to the group.
What is the best way to connect IOIO to a cell phone so that it uses as little power as possible? If I turn the charging pot all the way to the left, the phone doesn't see the board, and at the level where the phone sees the board reliably, the current is still too high for my setup (it overheats the voltage regulators I use to provide 5 v to the board).
Can I use IOIO in device mode with the phone? What is the cable I should use then?
I would rather not use bluetooth.
Thanks!
Sasha Kirillov
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