This work manifests a low-cost three phase digital signal processing (DSP) based energy monitoring with online data acquisition (DAQ) system. In this endeavor, multifarious parameters are measured. All these parameters are displayed on the TFT LCD of the microcontroller in the real-time domain. Along with the measurement of miscellaneous parameters from the microcontroller, these parameters are directed over the internet via Wi-Fi module. On the internet, there is a succinct, vivid and pithy data log of these measured parameters which show their respective instantaneous values and accumulates them on the internet. This data log interprets energy monitoring over a period of the day, week, month or year. This energy meter can measure voltage (RMS), current (RMS), apparent power (S), real power (P), frequency, displacement factor, distortion factor and total harmonic distortion (THD) of current and voltage using a STM32F429 microcontroller.