Member #529499

Member Since: March 10, 2014

Country: United States

  • No, you do not need a bluetooth dongle if your computer already supports bluetooth. I have connected my laptop directly to the Bluetooth Mate which I have connected to an Arduino Pro Mini. I can successfully communicate serial data between the arduino and my laptop, but I can not program the arduino via bluetooth (as you mentioned). I believe the key is that the RTS line from the bluetooth module is simply to control serial flow between the bluetooth module and the arduino (i.e. no relation to the laptop's RTS state). What we really need is GPIO10 (DTR) routed to DTR on JP3 so that the arduino IDE can reset the arduino board. The bluetooth module's UART_RTS (which is routed to JP3) is not the same as GPIO11 (RTS, but driven by the remote PC). Similarly, GPIO10 is DTR, but driven by the remote PC. There also seems to be some discrepancy between the Bluetooth Mate PDF and the Roving Networks documentation as far as pin numbers. The Bluetooth Mate PDF says it's using the RN-41, whereas the board now comes with the RN-42.

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