Nodemcu powering with 5.2v and 2A?
Generally, we specify DC power supplies as constant voltage sources.  In order to do this, power supplies deliver more or less current as demanded by the load in an attempt to keep the voltage constant regardless of the load.  

When a constant voltage DC power supply specifies a maximum current, it is saying the power supply can only maintain the specified voltage while the current demand is less than the specified maximum current.  

To be clear, unless you need a constant current power supply, a power supply should be picked based on the required constant voltage.  And the capacity of that power supply, usually measured in Amps, should exceed the maximum combined current demand of all connected devices (loads).