a friendly hello :
bought 5 bt to serial modules from dx.com (SKU: 80711, $ 6.60)
tried to qualify them for a higher data rate on several pc's and an android tablet, before making changes to my software ... horrible experience so far :(
bt module radio (80711 from dx) connected to opto isolated ftdi usb to serial with 3.3 V dongle. 3.3v power for bt-module from opto dongle (defeats the opto, but 3.3 V) ... opto connected to kubuntu usb and opened in cutecom 9600 bd ... ATs all correct, no problem ... firmware version linvor V1.8 (new ???)
1a) xp32 guest in vmware 7.16 running on kubuntu natty host. bt-dongle with csr chipset on kubuntu host but switched through to xp32 guest xp32 installed bluesoleil bt app / drivers ... discovered bt-module by mac addr and name linvor ... paired ok ...
this 1st time i was able to connect after it announced the module as a serial device ... solid led light, connected xp32 communication with br@y terminal over bt to serial opto to usb to cutecom in kubuntu host works fine. cutecom string transfer "hello fred" worked twice on 20+ tries, but bt status window (bluesoleil) indicated ever string reception in the count field ... as said, br@y terminal displayed the strings only 2 times.
from hereon everything went downhill ... i decided to reassign the virtual com port number ... result ... was never able again to "connect" solid led light ... bluesoleil said can't find service
1b) uninstalled bluesoleil and finally got xp32 sp3 bt-stack working ... module pairs ... once it indicated that it found a serial device and provided a com port number, but 5 mins later com port number gone ... didn't find the spp service or whatever the serial service / profile is called ... pairing ok ... but NO connect anymore
2) tried on a win 7 schlepptop (built in bt radio, ms-bt-stack) with similar indications as indicated in 1b.
3) tried on another schlepptop with external usb bt-radio and bluesoleil ... results as 1b.
4) tried on a samsung tablet (android) ... pairing ok ... no service found, therefor no connect
note all of these bt-tries worked fine with a belkin headset audio device (b21)
did anyone using a similar device within our arduino family experience similar problems or is it perhaps new with the linvor V1.8 slave firmware ... or am i doing something wrong ... i'm developing hardware and writing firmware for 30 years ... just don't know what could be wrong.
schematics for the 3.3 V opto usb 2 serial dongle can be found at http://wiki.efihacks.com/index.php?title=EfiMini_Opto-Coupled_3.3_V_Serial
i just don't know what could be wrong with the dx.com Wireless Bluetooth V2.0 RS232 TTL Transceiver Module for $ 6.60
i also ordered 3 save and 2 master devices from
but they have not arrived yet ... so i can't compare
please please, any help is highly appreciated