esp32f / energy_meter

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

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