rassaifred/home-power-monitor

esp8266 sct-013

Home-Power-Monitor

I create this project to monitor the power consumption for every room in my home.

THe Circuit

Futures:

• small enough to be placed in the fuse block
• no external wires, data is exposed over wifi
• use non invasive sensors for measurements of the current on every fuse
• WiFi manager
• OTA updates

EasyEDA link https://easyeda.com/marius.motea/power_meter

Components list:

• 1 x ESP-12
• 8 x SCT013 non invasive current sensors 30A
• 8 x PJ-320A Phone Jack 3.5 mm
• 2 x ADS1115
• 1 x TPS-03 3.3v mini power supply
• 1 x 2 pin header
• 4 x 10K smd resistors
• 8 x 22ohm smd resistors
• 3 x 1uF smd capacitor

Acessing the ip of the device will return a json with power consumption on all 8 inputs

How it works

The device return an json on every http get request with the number of watts for every input (circuit). To put the data in the database you need to set a cron that run at a number of minutes (depending on requirements) and insert the values from json in the database. Credentials and device ip must be set first in config.php. On web interface access there is a SELECT in the database for the records in the last 30 days. Echarts javascript plugin is used to render the values in graphs. I upload my own setup were i use input8 for total consumption and this is displayed in a second graph.

crontab example for data fetching every 5 minutes:

*/5 * * * * php /var/www/html/powermeter/cron.php