By far the easiest way to put the challenge in manufacturing is simply shoving the breadboard in a project box and declaring it achieved. It has the MCP1700 3.3V regulator to replace the LM1117 regulator from the nodeMCU design, the MCP part has a method decrease quiescent current which helps with the battery life. Due to this, the resulting noise present is many elements decrease than with an atypical straight cable.