feat: add UART reconnect and configurable channel logging

internal/config/config.go

@@ -0,0 +1,49 @@
+package config
+
+import (
+	"os"
+
+	"gopkg.in/yaml.v3"
+)
+
+type Config struct {
+	Serial struct {
+		Path string `yaml:"path"`
+	} `yaml:"serial"`
+	Video struct {
+		Enabled   bool   `yaml:"enabled"`
+		AuxIndex  int    `yaml:"aux_index"`
+		Threshold int16  `yaml:"threshold"`
+		Command   string `yaml:"command"`
+	} `yaml:"video"`
+	Logging struct {
+		Enabled bool   `yaml:"enabled"`
+		Path    string `yaml:"path"`
+	} `yaml:"logging"`
+}
+
+func Default() Config {
+	var c Config
+	c.Serial.Path = "/dev/ttyS0"
+	c.Video.Enabled = true
+	c.Video.AuxIndex = 5 // AUX2, zero-based
+	c.Video.Threshold = -512
+	c.Video.Command = "fpv-video"
+	c.Logging.Enabled = true
+	return c
+}
+
+func Load(path string) (Config, error) {
+	config := Default()
+	data, err := os.ReadFile(path)
+	if err != nil {
+		if os.IsNotExist(err) {
+			return config, nil
+		}
+		return config, err
+	}
+	if err := yaml.Unmarshal(data, &config); err != nil {
+		return config, err
+	}
+	return config, nil
+}