Vitaliy wrote: > Don French wrote: >> I am now looking at possible solutions from National Semi. Since my >> only requirement is for SPP support (Serial Port Profile) a device >> like the LMX9830 looks interesting. It is a complete solution, >> including antenna and a UART interface to the microcontroller. And at >> only $7.50 a pop in quantity, the price seems right. Any thoughts? > > Besides being Class 2, I think the two biggest problems are that the > unit is not self-contained (it doesn't have a build-in antenna), and > as a result you'll have to pay to get it certified ($$$). Please do > let me know what you find out, as we may need a Class 2 module for > future designs. > > On a related note, we've just tested the STM4100 module and the host > board, and were able to achieve a range of 70 m (device sitting on the > test bench, in the lab). I'm sure in situations with a direct line of > sight, the range will be at least 100 m (stay tuned for updates). > > Here are some quick-and-dirty pictures of the prototype: > > > > > I will make a post in [AD] next week, once we put together the spec > sheet. > > The STM-4100 will be used to replace the blue "fish tail" in this > picture: > > > > > The cool thing is, switching from BT to RS232 is completely > hands-free: the BT module "knows" when a serial cable is plugged in, > and tristates the Tx line. > > The "Power" LED functionality is pretty nice too: > > - When the module isn't in, it's red > - When the module is plugged in, but no BT connection, flashing > red/yellow > - When BT connection is established, but port is not open, solid yellow > - BT com port open, green > > Ya'll have a great weekend! > > Vitaliy I might be interested in something along these lines later on. Just a thought turn the led off when tx or rx is in progress (if its handy). That way you know that data is actually travelling. -- http://www.piclist.com PIC/SX FAQ & list archive View/change your membership options at http://mailman.mit.edu/mailman/listinfo/piclist