Contents

# frozen_string_literal: true

require "rmodbus"
require_relative "huawei_solar/array_ext"
require "yaml"

class HuaweiSolar
  def initialize(host, port=502, **opts)
    @client = ModBus::TCPClient.connect(host, port, opts)
    @client.debug = !ENV["DEBUG"].nil?
    @slave = @client.with_slave(1)
    @registers = YAML.load_file(File.expand_path("../data/registers.yml", __dir__))
  end

  def read(name, with_unit: false)
    name.is_a?(Array) ? read_multiple(name, with_unit:) : read_single(name, with_unit:)
  end

  def close
    @client.close
  end

  private

  def read_single(name, with_unit: false) # rubocop:disable Metrics/AbcSize
    register = register_by_name(name)
    type = find_type(register["type"])
    gain = register["gain"]
    unit = register["unit"]

    value = type.call(
      @slave.read_holding_registers(register["address"], register["quantity"])
    )

    value = value.is_a?(Array) && value.size == 1 ? value.first : value
    value = gain ? value / (gain * 1.0) : value

    with_unit && !unit.nil? ? "#{value} #{unit}" : value
  end

  def read_multiple(names, with_unit: false)
    names.map { |name| read_single(name, with_unit:) }
  end

  def register_by_name(name)
    @registers[name.to_s]
  end

  def find_type(type)
    Object.const_get("HuaweiSolar::#{type.capitalize}")
  end
end

require_relative "huawei_solar/string"
require_relative "huawei_solar/i16"
require_relative "huawei_solar/i32"
require_relative "huawei_solar/u16"
require_relative "huawei_solar/u32"
require_relative "huawei_solar/version"

Version data entries

2 entries across 2 versions & 1 rubygems

Version	Path
huawei_solar-0.0.4	lib/huawei_solar.rb
huawei_solar-0.0.3	lib/huawei_solar.rb