Based on the IotaWatt original open-source firmware, I have modified the hardware and software to support OLED to display both power(watt) and energy (kwh) for each channel. Moreover, some information that were displayed in the configuration panel, now are available in home screen of OLED. We can readily access to the content of real-time voltage and current, and accumulated energy in kwh for all 12 channels. I also have changed the hardware which now can support ESP8266-12E or ESP8266-07s to use external antenna. By the way, I was fascinated when I reviewed the source code at the first time and the great product of IotaWatt. Thanks for all your supports and efforts.