Hello, Thanks for the feedback. I have been doing some more reading online and I found that the audio pins can be set to TTL level RX and TX pins. If the USB cannot act as a host, does anyone know if the serial port can act as a host? Or another alternative, can a Bluetooth connection be made to allow communication with a sensor (assuming I make the sensor work with a Bluetooth module)?
Thanks for the help, Mas On Jul 10, 5:32 am, Disconnect <[email protected]> wrote: > When you plug your headset in, its not a usb port at all. Its straight > analog audio. (Take a closer look, there are 10 or so pins. There is > even a pinout diagram floating around, and 3way headset adapters that > allow usb data, headset audio and charging..) > > At the end of the day, usb host/guest is NOT interchangable without > hardware modifications. > > There is some good news here - rumours are that the g1 has a usb-otg > capable chipset. With 'magic' bit flipping (as in, the info has to > come from htc/qualcomm) and some minor hardware hacking (5v supply, > similar to what n770/n800/n810 needs) you can get usb host working. > (That 'minor' hack may be less minor if there is a diode in the way, > since it'd require soldering onto the board instead of just building > an adapter.) > > On Fri, Jul 10, 2009 at 4:16 AM, Nicholas > > > > Radford<[email protected]> wrote: > > The phones usb port is not a guest when I plug my headset into it. > > > It is when I plug my computer into it, but thats less of a guest / host > > situation and more like mutual devices chattering to it each other. > > > USB in just a serial bus at the end of the day. If one end has to be a host > > and the other a guest, this can change based on which configuration, non? > > It's not like USB are hardwired to be either host or guests, that's a > > progmatic thing, decided by the two devices in question. > > > On Fri, Jul 10, 2009 at 7:10 AM, Tony Su <[email protected]> wrote: > > >> Unless someone can answer definitively based on the phone's technical > >> information, > > >> Based on observation only, it's not possible based on general USB > >> architecture. In any USB connection, one endpoint is designated the Host > >> and > >> multiple guests can connect to that Host (IIRC theoretically 256 devices). > > >> Because the Phone can connect to the USB port of a computer, the computer > >> is always the Host and anything else that can connect is a Guest, so the > >> Phone's USB port is a Guest. > > >> A Sensor would also be a Guest so cannot connect to the Phone, it needs to > >> connect to a port configured as a Host. > > >> Tony > > >> ----- Original Message ----- > >> From: Mas <[email protected]> > >> Sent: Wed, 7/8/2009 12:12pm > >> To: Android Beginners <[email protected]> > >> Subject: [android-beginners] USB data acquisition > > >> Hello, > > >> I am doing a feasibility study using an Android Dev phone. I want to > >> attach the phone using the USB cable (or the serial port) to a sensor. > >> In an application, I want to pole the sensor over the cable and have > >> the resultant value displayed on the screen. The interaction between > >> the sensor and the phone would involve the phone sending down a > >> request data byte and the sensor responding with the necessary data. > >> Is a data acquisition application of this nature possible on the > >> phone? > > >> Thank you for your time, > >> Mas --~--~---------~--~----~------------~-------~--~----~ You received this message because you are subscribed to the Google Groups "Android Beginners" group. To post to this group, send email to [email protected] To unsubscribe from this group, send email to [email protected] For more options, visit this group at http://groups.google.com/group/android-beginners?hl=en -~----------~----~----~----~------~----~------~--~---
