Serial does not have a master/slave requirement, so that will work if you can get serial working on the G1. (The necessary cables exist, but information on making or getting them has yet to come out of google afaik. I think either San or Romainguy were working on it, although I could be wrong.)
Bluetooth has no API support (but then again, neither does usb-otg or serial so..) but otherwise is a fully functioning stack - if you use rfcomm-compatible modules (serial over bt) you should be fine. (It would require root of course.) On Fri, Jul 10, 2009 at 2:30 PM, Mas<[email protected]> wrote: > > 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 -~----------~----~----~----~------~----~------~--~---
