87 lines
2.6 KiB
Nix
87 lines
2.6 KiB
Nix
{ config, lib, pkgs, ... }:
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# Replacement for powerraw.shack pollin box
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# Requires usb-serial device on host
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# Requires mqtt available at mqtt.shack
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# Requires hostname powerraw.shack
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let
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influx-url = "http://influx.shack:8086";
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pkg = pkgs.python3.pkgs.callPackage (
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pkgs.fetchFromGitHub {
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owner = "shackspace";
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repo = "powermeter";
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rev = "438b08f";
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sha256 = "0c5czmrwlw985b7ia6077mfrvbf2fq51iajb481pgqbywgxqis5m";
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}) {};
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in {
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# receive response from light.shack / standby.shack
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networking.firewall.allowedUDPPorts = [ 11111 ];
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networking.firewall.allowedTCPPorts = [ 11111 ];
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users.users.powermeter = {
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extraGroups = [ "dialout" ];
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isSystemUser = true;
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group = "powermeter";
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};
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users.groups.powermeter = {};
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# we make sure that usb-ttl has the correct permissions
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# creates /dev/powerraw
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services.udev.extraRules = ''
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SUBSYSTEM=="tty", ATTRS{idVendor}=="0403", ATTRS{idProduct}=="6001", SYMLINK+="powerraw", MODE="0660", GROUP="dialout"
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'';
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systemd.services.powermeter-serial2mqtt = {
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description = "powerraw Serial -> mqtt";
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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User = "powermeter";
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ExecStart = "${pkg}/bin/powermeter-serial2mqtt /dev/powerraw";
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PrivateTmp = true;
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Restart = "always";
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RestartSec = "15";
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};
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};
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systemd.services.powermeter-mqtt2socket = {
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description = "powerraw mqtt -> raw socket 11111";
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wantedBy = [ "multi-user.target" ];
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serviceConfig = {
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User = "powermeter";
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ExecStart = "${pkg}/bin/powermeter-mqtt2socket";
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PrivateTmp = true;
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Restart = "always";
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RestartSec = "15";
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};
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};
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services.telegraf = {
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enable = true;
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extraConfig = {
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agent.debug = false;
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outputs = {
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influxdb = [{
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urls = [ influx-url ];
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database = "telegraf";
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}];
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};
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};
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};
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services.telegraf.extraConfig.inputs.mqtt_consumer = let
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genTopic = name: topic: tags: {
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servers = [ "tcp://mqtt.shack:1883" ];
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qos = 0;
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connection_timeout = "30s";
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topics = [ topic ];
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inherit tags;
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persistent_session = false;
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name_override = name;
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data_format = "value";
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data_type = "float";
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};
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sensor = "total";
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types = [ "Voltage" "Current" "Power" ];
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phases = [ "1" "2" "3" ];
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in
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[ (genTopic "Power consumed" "/power/${sensor}/consumed" { inherit sensor; }) ] ++
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(lib.flatten (map (type: (map (phase: (genTopic "Power" "/power/${sensor}/L${toString phase}/${type}" { inherit sensor phase type; }) ) phases)) types));
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}
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