Si7021 on a esp8266 nodeMCU

Hey all, I have the adafruit Si7021 sensor and using it with the Uno was a breeze. I've now switched to an esp8266 nodeMCU for the built in WiFi to eventually have it post results out of the WiFi. I'm having a lot of trouble finding consistent documentation to get this to work, even out serial monitor. Does anyone have any experience with this? Thanks!