Programming BT modem

Wireless & IoT
1

Good afternoon,

We used to use in our lab previous BT modem (blue smirf gold) with Mitsumi modules using the following configuration:

  • Set the Radio name (por ejemplo, iDAMv3m4) donde m4 es modulo 4. [ATSN,iDAMv3m4]

  • Set baud rate (115.2kbps, not par, 8 bits, 1 stop) [ATSW20,472,0,0,1]

  • set mode (Slave, fast data, ignore UART while unconnected, SPP) [ATSW25,0,0,1,0]

We bought for new systems new modules (Roving Networks chips, http://www.sparkfun.com/commerce/produc … cts_id=582) but need the same configuration to be compatible with our command software. I can’t find the equivalent commands in RN command set and I don’t know so much in BT stuff (I am new in the project).

Can you help ?

Yours truly

Antoine Defontaine

LTSI - INSERM U642

France

2

Could our problem come from the fact we were setting a flag at vcc the first second in IO4 at power up ? It seems it could crash with new modules, isn’t it ? If so, we’ll have to change our firmware.

Old BT module:

" Warning:

The only way to communicate to the radio after setting the radio in “Fast Data Mode” and “ignore UART while unconnected” is to apply 3.3Vdc on PIO(4) during initial power up for 1 sec.

These settings are used if you have no control over the source of streaming data into the radio, or you do not know when the radio has made a Bluetooth connection, and do not plan on sending any AT commands."

New BT module:

" WARNING:

GPIO-4 is used by the system to reset stored parameters to factory defaults. If GPIO4 is pulled high on power-up, and then toggled 3 times, all user settings will return to default values. Therefore this pin should not be used as an output, and should not be driven high at power-up time (first 1 second of operation)."

Antoine