config.example.json

{
    "channels": [
        {
            // name of the channel
            "name": "Channel 1 (5V)",
            // display channel in GUI
            "enabled": true,
            // add to aggregated power. this is useful if one channel provides the power for another channel with a step-up or down converter
            "aggregate_power": true,
            // default voltage displayed by a blue dashed line
            "voltage": 5.3,
            "calibration": {
                // shunt resistance in milliohm
                "shunt": 25.0,
                // check the raw sensor values with no load attached and everything warmed up to working temperature
                // compare if there is a big different between a hot and cold device. a temperature compensation can easily be added
                // raw sensor offset for no current (Vshunt=0.0000mV)
                "vshunt_raw_offset": -16,
                // dividing the shunt equals multiplying the shunt voltage or dividing the current
                // V = I * (R / Cvbus) == R = (Cvbus * V) / I
                // multiplier = displayed current / real current
                "vshunt_multiplier": 0.994137858,
                // calibration multiplier for bus voltage = real voltage / displayed voltage
                // bus voltage is load voltage + shunt voltage. make sure to measure the correct side of the shunt or without any load
                // multiplier = (load voltage + shunt voltage OR bus voltage) / displayed load voltage
                "vbus_multiplier": 1.0
            }
        },
        {
            "name": "Channel 2 (12V)",
            "enabled": true,
            "aggregate_power": true,
            "voltage": 12.0,
            "calibration": {
                "shunt": 25.0,
                "vshunt_raw_offset": -32,
                "vshunt_multiplier": 0.985870772,
                "vbus_multiplier": 1.0
            }
        },
        {
            "name": "Channel 3 (19V)",
            "enabled": false,
            "aggregate_power": true,
            "voltage": 19.5,
            "calibration": {
                "shunt": 50.0
            }
        }
    ],
    // this only works with DPMS but not screen blanking
    // the command can be replaced with anything to detect the state modifying the regular expressions below
    "idle_check_cmd": "/usr/bin/xset -display ${DISPLAY} -q",
    // regex case-insensitive to detect if the monitor is on
    "idle_check_monitor_on": "^\\s*monitor is on",
    "idle_check_monitor_off": "^\\s*monitor is off",
    "gui": {
        // with x height x scaling
        "geometry": "800x480x1.0",
        //"geometry": "1024x600x1.0",
        "color_scheme": "DARK",
        "fullscreen": true,
        "display": ":0.0",
        "key_bindings": {
            "end_fullscreen": "<Escape>",
            "menu": "<F1>",
            "plot_display_energy": "<F4>",
            "plot_primary_display": "<F3>",
            "plot_visibility": "<F2>",
            "quit": "<Alt-F4>",
            "reload_config": "<Control-F5>",
            "reset_plot": "<Control-F10>",
            "toggle_debug": "<Control-F9>",
            "toggle_fullscreen": "<F11>"
        }
    },
    "plot": {
        // on a raspberry pi 3, it can do ~3-15 frames per second
        // 15-30% load on a single core with 2 updates per second, depending on the number of plots
        "refresh_interval": 250,
        // cuts down CPU load to a bare minimum when the monitor is off, but keeps the screen updated
        "idle_refresh_interval": 5000,
        "max_values": 8192,
        // "max_time": "30min",
        "max_time": 900,
        "line_width": 3.0,
        // +5% or 105%
        "current_top_margin": 5,
        // -12% or 88%
        "current_bottom_margin": 12,
        "power_top_margin": 5,
        "power_bottom_margin": 10,
        "voltage_top_margin": 1,
        "voltage_bottom_margin": 1,
        "compression": {
            "uncompressed_time": 60
        }
    },
    "ina3221": {
        "averaging_mode": "x64",
        "vshunt_conversion_time": "time_1100_us",
        "vbus_conversion_time": "time_1100_us"
        // fastest mode
        // "averaging_mode": "x1",
        // "vshunt_conversion_time": "time_140_us",
        // "vbus_conversion_time": "time_140_us"
    },
    "mqtt": {
        "host": "localhost",
        "port": 1883,
        "update_interval": 30,
        "topic_prefix": "home",
        "auto_discovery": true,
        "auto_discovery_prefix": "homeassistant"
    },
    "verbose": false,
    "headless": false
}