Downloads: WT Modules - FAQ Version 1.4 (dated 19 January 2007)  168KB Bluetooth Technology Training (by Bluetooth SIG) Bluegiga WT11 and WT12 Modules - Get Started Guide 156KB FTDI TTL-232R-3V3 datasheet 507KB   Frequenty Asked Questions: Q - Is it possible to use one PCB with one common footprint that will be able to use either the WT11 or WT12 module? A - Yes  a PCB designed for one module can be used with the other module provided the 3 extra pins  on the WT12 (pins 29-31) are not used. Also keep in mind that the PCB meant for both modules must be designed ensuring that there is no ground plane present below the antenna. Q - If a Bluegiga module is in "PAGEMODE 2" (e.g. command = "SET BT PAGEMODE 2 2000 1"), then would I be correct in saying that no RF transmissions are sent from the module unless a CALL is made to it (e.g. "CALL 00:07:80:80:52:27 1 RFCOMM")? We believe that there will be no RF transmission from the device in "PAGEMODE 2" unless a "CALL" is made to it (completely silent over RF and only receiving data). A - With PAGEMODE 2 iWRAP cannot be "seen" by other devices in an inquiry. The module is connectable and it can also establish connections of its own. In PAGEMODE 2 the module doesn't emit any RF unless link is opened. The radio is only listening to RF traffic between certain intervals. Q - We have 3 units on a piconet, A, B and C: (B) calls (A). (A) is master, (B) is slave on the link - this works. (C) calls (A). (C) is master, (A) is slave on the link - this doesn't. We know that we can manually change the link role using "SET {link id} SLAVE", but want to manage the roles automatically using the values set in the command "SET BT ROLE {ms_policy} {link_policy} {supervision_timeout}". A - We have isolated this bug to the CSR firmware so we really cannot do anything about it immediately. The only workaround for this is that the A device needs to manually give "SET [link id] SLAVE" command after the connection with the C is established.