please name the i2c devices you have tested or using

ESP8266 - PCF8574 8 bit IO expander from DX.com

pinMode(NodeMCU.D5,'input_pullup');
pinMode(NodeMCU.D4,'input_pullup');

I2C1.setup({scl:NodeMCU.D5, sda:NodeMCU.D4});
var lcd = require("HD44780").connectI2C(I2C1);
lcd.print("Hello World!");
lcd.setCursor(0,1);
lcd.print("ESP8266!");

I'm not sure if the pull up lines even have an effect, as it works without them too!

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