http://www.electrodragon.com/w/Wi07c#new_version_091
SDM Energy Meter: https://github.com/reaper7/SDM_Energy_Meter
MLEDScroll (TM1640 led matrix): https://github.com/reaper7/MLEDScroll
Apparently, there are 11 different designs based on the ESP8266...
One picture is worth a thousand words:
More details can be found in this Chinese forum thread:
http://www.ai-thinker.com/forum.php?mod ... a=page%3D1
If someone can tell me who is the original designer, he (she) will get my consideration!