It is not specific to IOIO, I am sure about that since it charges at the same rate when connected to laptop. It draws 220 ma when connected to 3 Lion batteries in series and 260 ma when connected to dc-dc buck converter fed by a much bigger lead acid battery.
When screen is kept alive, the IOIO manages to raise the charge level, but as soon as Tango is connected, the charge starts to slide down slowly. May be I should disconnect the Tango during the idle times and let phone juice up a little bit. Thanks for your time. Kannan On Thursday, August 3, 2017 at 5:28:43 AM UTC+5:30, Ytai wrote: > > I don't know that there's anything that can be done about this, as it is > the phone that determines how much current to draw (up to a 500mA limit, > specified by the USB standard). Perhaps there's some protocol that I'm not > aware of to let the phone know it can draw more. > > To make sure that what you're seeing is not IOIO specific, try comparing > the charging rate to that obtained by connecting the phone to a PC (or any > other source that provides a data connection and not just power). > > On Tue, Aug 1, 2017 at 11:49 PM, kkannan <[email protected] > <javascript:>> wrote: > >> Hello Ytai & IOIO users, >> >> Thanks for the nice board and concept. it simplifies lot of things for >> me. >> >> This is my first project using IOIO and Android phone to control a rover >> using google Tango API. I am using a Lenovo phap 2 pro with Tango and >> custom build app which does all the navigation. The problem is that the >> phone needs to be charged continuously since it consumes lot of power due >> to the Tango. I was hoping the IOIO board will top up the phone if >> connected using an external power. It charges the phone alright but only >> barely. >> >> When I measured the current going through IOIO it show 220 ma with >> trimming pot cranked all the way up clockwise. Lenovo p2p is capable of >> quick charging and I want to keep it charged fully or at least not letting >> it down. At this rate, the phone looses 1% over every hr and I want to keep >> the phone embedded and never to be taken out. >> >> Since the 5V reg on IOIO is capable of putting out 1.5A, is there anyway >> I can increase the charging current beyond what it is now ? >> >> Appreciate any pointers to solve this issue. >> >> Thanks >> Kannan >> >> -- >> You received this message because you are subscribed to the Google Groups >> "ioio-users" group. >> To unsubscribe from this group and stop receiving emails from it, send an >> email to [email protected] <javascript:>. >> To post to this group, send email to [email protected] >> <javascript:>. >> Visit this group at https://groups.google.com/group/ioio-users. >> For more options, visit https://groups.google.com/d/optout. >> > > -- You received this message because you are subscribed to the Google Groups "ioio-users" group. To unsubscribe from this group and stop receiving emails from it, send an email to [email protected]. To post to this group, send email to [email protected]. Visit this group at https://groups.google.com/group/ioio-users. For more options, visit https://groups.google.com/d/optout.
