Using Bluetooth With the Propeller?

rwgast_logicdesign

Ok so one day i saw this article http://gadgetgangster.com/news/56-jeffs-shop/534-bluetooth-howto.html, so the other day i started cracking open blue tooth keys I had laying around. On one of them there are a few very small surface mount pads labeled:

SPI_Clk
SPI_CSB
SPI_MISO
SPI_MOSI

UART_TX
UART_RTS
UART_CTS
UART_RX

Now im wondering if this module will work with my prop, the article says nothing about the chipset used in the bluetooth module. Does the chipset even matter, or does the usb key just know TTL? What I would like to do is make the connections to tx/rx/rts and 3.3v to use the usb module as a wirless programmer, Im not sure how to set up the computer to transmit over the bluetooth adapter and not a COM port though. Im also wondering if I can use the spi pads for wireless communication between the computer and prop, since spi would be faster as long as I wasnt trying to program the propeller. But when using spi, wouldnt I need to know some kind of protocall to communicate with the bluetooth chip?

Also if anyone knows in the GG article I posted it shows header connected to the module and a cable plugging into the prop. I dont understand thats where the usb voltage and data lines are on USB keys but I dont see those on his stick.

Oldbitcollector (Jeff)

Does you module look like these?

http://www.ebay.com/itm/1pcs-Wireless-Bluetooth-Transceiver-Module-RS232-TTL-HC-05-/251066012059?pt=LH_DefaultDomain_0&hash=item3a74b3519b

My module is one of these mounted on a breakout to make it easy to get into the Vdd/Vss Tx/Rx lines.

OBC

rwgast_logicdesign

Nope not at all I got mine from new egg a few years ago, heres a pic of the breakout on the back, and the chips on the front. Mine also has a csr chip im not sure if its the same as yours though its a csr 41b14 3a06uk745rs.

front with chips
back with uart and spi serial

Im sure it should work, what id like to know is why are all the break out boards on the net like 50 dollars?? Maybe we could just buy these chips and make cheap bluetooth boards for uControllers? I would also like to know how to use the SPI hook ups..

Oldbitcollector (Jeff)

Why 50 dollars? I bought one of these for my example..

http://www.ebay.com/itm/BT-Board-Serial-4-Pin-Bluetooth-RF-Transceiver-Module-Backplane-RS232-F-Arduino-/261031956317?pt=LH_DefaultDomain_0&hash=item3cc6b78f5d#ht_1574wt_698

We had considered stocking these at Gadget Gangster, but they are plentiful everywhere else from what I can see.

OBC

rwgast_logicdesign

thats a really nice setup it boggles my mind that all of sparkfuns bt modules are 50+. i would really like a few of those bt boards, but that supplyer is out do u know where else i can find them.

also do u have any idea how to set spin tool or bst up to program over bt? what id really like is to figure out these chips and make a prop board with wireless programming built in.

Oldbitcollector (Jeff)

I wasn't able to program the Propeller using the bluetooth module on a breakout. Part of it the lack of control over the reset line, part of it is probably the speed of the connection itself. Of course, having said this, someone will find a way to do it.

OBC

jazzed

Some requirements for programing propeller via BlueTooth.

• BlueTooth dongle with a paired serial port configuration.
• The serial port must not introduce extra delays.
• A loader that can toggle the reset line (typically RTS).
• A transistor circuit that detects a change in the reset line and pulls RESn low.

The loader that comes with Propeller-GCC has RTS control and can program spin binary files.
Attached is a picture of the typical open collector transistor circuit.

Also attached is a windows version of the propeller-load program (available for other O/S too).
Please review the Propeller Loader documentation at www.parallax.com/propellergcc