| OV || Pin39 || -|| <span style="color:#FFFFFF; background:#000000">0v Ground</span> || <span style="color:#FFFFFF; background:#00aa00">GPIO 21</span> || 29|| Pin 40|| - | | OV || Pin39 || -|| <span style="color:#FFFFFF; background:#000000">0v Ground</span> || <span style="color:#FFFFFF; background:#00aa00">GPIO 21</span> || 29|| Pin 40|| - |