This is a PCB board to experiment with HopeRF RFM69HW and RFM98 radio modules (or any modules in that family with a compatible footprint).
The module can be accessed directly throught JP1 which breaks out the modules SPI bus and a few other pins.
Alternatively a LPC812 (ARM Cortex-M0+ MCU) can be soldered on the board as a controller. Firmware for the LPC812 is here: https://github.com/jdesbonnet/RFM69_LPC812_firmware
There is a blog post discussing this in more detail here: http://jdesbonnet.blogspot.ie/2014/12/experiments-with-rfm69-433mhz-digital.html
Leftmost column of 6 pins (from top to bottom): RESET, UART_TXD, UART_RXD, NC, ISP_ENTRY, GND.
Second column from left of 3 pins (from top to bottom): SWD_CLOCK, SWD_DATA, NC.
Three pin row above MCU (from left to right): 3.3V, GND, NC.
Three pin row at top-right corner of the board (from left to right): 3.3V, GND, NC.
NC: not connect. SWD: serial wire debug.
Consider side SMA connector