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ESP32 code for 3-phase realtime energy metering device to MQTT server through WiFi.

includePath:
/home/wolfram77/esp/esp-idf/components/**

situation

  • World population growing, moving to cities
  • Urban density & complexity increasing
  • Energy consumption increasing substatially
  • Climate is changing, prepare for future climates
  • Slow change in developed countries
  • Buildings are becoming complex
  • Building integrated photovoltaics
  • Sustainable built environment
  • Higher comfort demands
  • Healthy buildings

conserve

  • Natural lighting & ventilation
  • Upgrade to energy efficient appliances
  • Device usage statistics (geyser, fridge, AC)
  • Reduce reliance on appliances (candlelight, water cooler)
  • Unplug devices when not in use
  • Batch tasks (baking all in one go)
  • Use renewable energy

features

  • Voltage: RMS, pk-pk, FFT, quality, indicate peak load times
  • Current: RMS, pk-pk, FFT, usage, indicate internal load
  • Power: inst., apparent, true, bill usage rate monthly, sense device
  • Sense: temp., humidity, VOC, CO, CO2, PM, electric sound (devices)
  • Control: room supply, mode setup
  • More: state, district bill rate chart, predict bill, zero usage
  • More: incentive non peak load, new home device recommendations
  • More: shared info distribution, zero energy, device efficiency

Prepare features:

  • Calculate time by fetching from NTP
  • Show energy use graph
  • Predict energy use based on current usage
  • Predict bill based on current use
  • Server size storage and analytics
  • Enable configuration, price chart fetching
  • Indicate energy source (coal, nuclear)
  • Indicate savings
  • Multiple access passwords
  • Skill to ask for energy bill (ga, alexa)
  • Previous month electricity bill, usage
  • Prepaid mode?
  • Reading averager
  • Use watchdog to make more self resets
  • Throughout day energy use
  • Room wise energy use (/ac)
  • Instruct fridge, ac?
  • Hacker prevention

device

  • NVS partition generation

http

  • To write http apis here

reference

ESP32  --->  WiFi     BT    2 cores  peripherals
(40mm)     (2.4Ghz)  (4.2)  (+ULP)

ESP-IDF

setup

# enable access to serial port (TTY)
sudo usermod -a -G dialout $USER

# environment variables
$ESPPORT, $ESPBAUD, $MONITORBAUD

flash

make menuconfig     # application configuration
make -j8            # build application
make flash          # flash to device
make monitor        # monitor device logs

mqtt

# kill process using a port
lsof -i :1883
kill -9 <pid>

# start MQTT server and client
mosquitto
mosquitto_sub -h test.mosquitto.org -t "#" -v