I have a general question about how BlueTooth chips are set up:
When you are setting up a bluetooth chip (i.e. installing the firmware which will make the chip do what it needs to) the chip is usually integrated into a board which you connect to your computer so you can install the firmware on the bluetooth chip.
My question is: does this mean when you purchase the individual bluetooth modules on their own, these have to be soldered/integrated onto a circuit with a USB interface each time you need to install firmware onto the bluetooth chip??
For example, if I want to simply have a bluetooth module connected to an LED, and all it is is the module, the battery input, and the LED, and I want to connect to this module using an app on my phone and turn on the LED using my phone. How do I go about installing the firmware onto the chip to do this? Your help is much appreciated. Kindest regards.