Post by thread:[EE] Bluetooth how-to

On Thu, 3 Nov 2005 08:46:07 -0500, you wrote: >I have a small sensor board that passes data from a pair of sensors to a remote app less than 10 meters from the sensor location. This is currently done with a RS232 link. The link is two-way, in that the app requests data and the sensor board responds. There is no handshaking of any type. I would like to eliminate this cabled link by transmitting the data via bluetooth from/to the remote app. The link must be pretty reliable. It IS NECESSARY for the link to ultimately present the data to the app and to the sensor board as RS232 data. As usual, cost is an issue. > >Is BT the way to go here? What alternate wireless solution(s) should I consider? BT is probably serious overkill for this, but the availability of cheap Bluetooth USB dongles may help (if you can figure out how to talk to them - not sure how standardised this is) - I'd look at short-range 433/869MHz modules or possibly Zigbee.

At 08:46 AM 11/3/2005 -0500, you wrote: >I have a small sensor board that passes data from a pair of sensors to a >remote app less than 10 meters from the sensor location. This is currently >done with a RS232 link. The link is two-way, in that the app requests data >and the sensor board responds. There is no handshaking of any type. I >would like to eliminate this cabled link by transmitting the data via >bluetooth from/to the remote app. The link must be pretty reliable. It IS >NECESSARY for the link to ultimately present the data to the app and to >the sensor board as RS232 data. As usual, cost is an issue. > >Is BT the way to go here? >What alternate wireless solution(s) should I consider? Have a look at Zigbee. >Best regards, Spehro Pefhany --"it's the network..." "The Journey is the reward" spam_OUTspeffTakeThisOuTinterlog.com Info for manufacturers: http://www.trexon.com Embedded software/hardware/analog Info for designers: http://www.speff.com ->> Inexpensive test equipment & parts http://search.ebay.com/_W0QQsassZspeff

Take a look at the Xbee...they are TTL serial, so slap on a RS232 driver and you are there. http://www.maxstream.net Mike Harrison <mikeKILLspamwhitewing.co.uk> wrote: On Thu, 3 Nov 2005 08:46:07 -0500, you wrote: >I have a small sensor board that passes data from a pair of sensors to a remote app less than 10 meters from the sensor location. This is currently done with a RS232 link. The link is two-way, in that the app requests data and the sensor board responds. There is no handshaking of any type. I would like to eliminate this cabled link by transmitting the data via bluetooth from/to the remote app. The link must be pretty reliable. It IS NECESSARY for the link to ultimately present the data to the app and to the sensor board as RS232 data. As usual, cost is an issue. > >Is BT the way to go here? What alternate wireless solution(s) should I consider? BT is probably serious overkill for this, but the availability of cheap Bluetooth USB dongles may help (if you can figure out how to talk to them - not sure how standardised this is) - I'd look at short-range 433/869MHz modules or possibly Zigbee.

Sparkfun (http://www.sparkfun.com) have some interesting Bluetooth (and other) solutions. -marc On 11/3/05, alan smith <.....micro_eng2KILLspam.....yahoo.com> wrote: {Quote hidden}> > Take a look at the Xbee...they are TTL serial, so slap on a RS232 driver > and you are there. > > http://www.maxstream.net <http://www.maxstream.net> > > > Mike Harrison <EraseMEmikespam_OUTTakeThisOuTwhitewing.co.uk> wrote: > On Thu, 3 Nov 2005 08:46:07 -0500, you wrote: > > >I have a small sensor board that passes data from a pair of sensors to a > remote app less than 10 meters from the sensor location. This is currently > done with a RS232 link. The link is two-way, in that the app requests data > and the sensor board responds. There is no handshaking of any type. I would > like to eliminate this cabled link by transmitting the data via bluetooth > from/to the remote app. The link must be pretty reliable. It IS NECESSARY > for the link to ultimately present the data to the app and to the sensor > board as RS232 data. As usual, cost is an issue. > > > >Is BT the way to go here? What alternate wireless solution(s) should I > consider? > > BT is probably serious overkill for this, but the availability of cheap > Bluetooth USB dongles may > help (if you can figure out how to talk to them - not sure how > standardised this is) - I'd look at > short-range 433/869MHz modules or possibly Zigbee. > > >

sounds like IRLP :-) KY1K <ky1kspam_OUTpivot.net> wrote:At 11:02 AM 11/3/2005, you wrote: >The serial to bluetooth adapter from http://www.aircable.net/ works well as >long as you can live with the very short range that the bluetooth standard >provides. I didn't catch the start of this thread, but I have a related question. I need stand alone full transceivers that take audio in and output audio. They need to use low power so they can run on batteries and only need to cover 20 to 30 feet indoors (no large metal obstructions). They do not need to be full duplex, but a full duplex system is ok. I want then for a wireless link to my ham radio transceiver, so I can move about the house some and still be able to talk and listen to the activity on the transceiver and be able to transmit if I want to. I can find wireless microphones, and can find wireless headphones....but I can't find a system that has BOTH. Any suggestions? Art

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