Photovoltaic monitoring using Arduino, MySQL, and Apache

I assume that you have knowledge about electrical in photovoltaic system because you will deal with high voltage to measure solar panel and i will take no responsibilities if something happened to you. Safety comes first '-')/

• NodeMCU ESP8266
• RTC DS3231
• LCD 20x4 I2C
• PZEM-016
• PZEM-017
• MAX485 module
• micro SD card module reader/writer
• micro SD <= 2 GB or micro SD SDHC <= 32 GB

• Arduino IDE
• XAMPP

• RTC DS3231 by Andrew Wickert (Arduino IDE -> Skecth -> Include Library -> Manage Libraries)
• NTP Client library forked by Taranais
• ModbusMaster Library
• ESP8266 Boards (http://arduino.esp8266.com/stable/package_esp8266com_index.json)

Please turn off all the power before you connect the components. Any exposed conductors need to be isolated and fused