Hi,
I have a project where i need BT4 connectivity. I have browsed the usual stored, but there seems to be really a lot of stuff available and I have hard time choosing, as I have little experience with BT.
I need something that will pair with PC/laptop/smartphone out of the box using only UART or SPI interface that is well documented (for some reason like 3 out of 4 modules I see do not have any publicly available command set documentation). I do not want to purchase more programming/flashing/configuration hardware, as this would not only increase cost but also be pain in the ass during production. I also do not want torun application code on the BT module. Power consumption is a secondary matter. NDA required is fine if there is no way, but $1k+ devkits (looking at Z-Wave) or 100k MOQ are a show stopper (specialistic device, target annual volume in single hundreds of units).
I need the module to be as small as possible doe to the compact form factor of the device. something along the lines of 15x20mm is an absolute maximum, I'd like it to be smaller if possible.
Do you know of any candidates?