http://myiot.co.uk/ESP01_I2C/index.html
http://myiot.co.uk/ESP_OLED/index.html
@quickfix: Generally I use Wemos boards but unless you are using their shields it becomes messy. These boards are extremely tidy & very small. Lots of I2C devices drop straight in. The USB A connector on the board plugs straight into a phone charger too. No need for a cable.
Cheers
Ian