A recommended programming cable (FTDI) is available at Amazon.
Note that the required cable is a 3.3V signal level type.
https://www.amazon.com/dp/B00XRBQJL8/ref=cm_sw_em_r_mt_dp_U_WFSuDbV0HWF9E
https://www.amazon.com/dp/B00SK8LK1W/ref=cm_sw_em_r_mt_dp_U_UISuDb9XXHTPE
The black wire should be connected to the ground pin.
