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nrf51822 module


i have purchased the following module image description

However, after connecting the VCC and GND to 3.3v DC supply the module is not detected. My questions are :-

  1. Does this module come with firmware preloaded, or does one have to load it

  2. If the latter, i.e. it has to be loaded - vs using a JTAG or JLINK for some other programmer, can this be done by directly connecting the SWDCLK, SWDIO line to a FTDI or say an Ardunio i.e. use either an FTDI device or an Arduino as a programmer. If yes, could someone please guide me to the appropriate link

  3. I also read somewhere, that OTA programming of this module is possible. So will also be curious to understand exactly how ?