How do these look?
Laird Technologym, all $22 at Mouser. I don't quite grasp the subtleties between them.
Ah - interface type seems to be the differentiator:http://www.mouser.com/ds/2/223/LWS-DS-BTM410-411%200412-201563.pdf
Bluetooth / 802.15.1 Modules Class2 v2.1+EDR AT Data, Int Ant
Host Interface: UART Supports CTS, RTS, DTR, DSR, DCD and RIhttp://www.mouser.com/ds/2/223/btm420.421-187315.pdf
Bluetooth / 802.15.1 Modules Class2 v2.1+EDR HCI Data, Int Ant
Host Interface: USB Qualified to USB v 1.1. Compliant with USB 2.0 Data signalling requirements.http://www.mouser.com/ds/2/223/LWS-DS-BTM430-431%200412-195524.pdf
Bluetooth / 802.15.1 Modules Class2 v2.0+EDR, AT Data, IntAnt, BISMII
Host Interface UART Supports CTS, RTS, DTR, DSR, DCD and RI
All are Class 2, V2.0 or V2.1 Bluetooth, antenna built in, good range.
So assuming V2.1 is better than V2.0, and UART will connect to uC's Rx/Tx, looks like BTM-411 would be the way to go?
The Laird Technologies Wireless M2M Solutions BTM411 Bluetooth AT Data Module is designed to add robust, short range Bluetooth data connectivity to a variety of products. Laird Technologies Wireless M2M Solutions BTM411 AT Data Modules are based on the market leading Cambridge Silicon Radio BC04 chipset and provide exceptional low power consumption with outstanding range. The BTM411 supports the latest Bluetooth Version 2.1 Specification and is ideal for a variety of applications, including wirelessly connected medical devices The DVK-BTM411 Bluetooth® Module Kit lets you test and design applications incorporating the BTM411 module. The Laird Technologies Wireless M2M Solutions DVK-BTM411 kit features an integrated antenna and allows developers to add robust, short range Bluetooth data connectivity to their products.
CSR BC04 chipset data?http://www.csr.com/products/49/bluecore4-pc-rom
Thought I saw 79 channels somewhere, should allow 25 pairs to connect up without interference?