I wouldn't bother trying, the LED light bulb almost certainly won't work with that dimmer and even if it did, the current transformer would not produce a good enough output to be usable. Inside most LED lamps there is a current regulator which would 'fight back' at your attempts to dim it. Each of the two projects would work on their own for their designed purposes but not together and for an LED load.
A current transformer specification assumes a sine wave current is passing through its primary and it induces a measurable voltage across a load (aka 'burden') on the secondary side. If you use a triac or SCR to control the AC as the dimmer does, it 'chops' the waveform so that part of the cycle is not conducted. The overall effect is that the power to the load is reduced because it isn't there all the time but by rapidly interrupting the current, it breaks the sine waveform and will produce an unpredictable output from the current transformer.
The data sheet is misleading, it states the PZEM module uses RS485 protocol but also shows it having a TX and RX pin. RS485 is a bi-directional electrical specification, not a protocol and it uses two differential signal lines sharing TX and RX function. If it doesn't use RS485 but uses standard full duplex serial data instead, you still need a level shifter to convert between the 5V signal it produces and requires and the maximum 3.3V the ESP8266 uses. If you connect them without a converter the ESP8266 (nodeMCU) will be destroyed!
Brian.