Script to read Nest Thermostat recorded temperature (exported from https://takeout.google.com/)

nest_data.go

package main

import (
	"bufio"
	"encoding/json"
	"fmt"
	"os"
	"strings"
)

func main() {
  // Path to the `HvacRuntime.jsonl` file
	file, err := os.Open(os.Args[1])
	if err != nil {
		panic(err)
	}
	defer file.Close()

	scanner := bufio.NewScanner(file)
	for scanner.Scan() {
		var obj map[string]interface{}
		line := scanner.Text()

		// Remove leading/trailing double quotes and unescape inner quotes
		if strings.HasPrefix(line, "\"") && strings.HasSuffix(line, "\"") {
			line = line[1 : len(line)-1]
		}
		line = strings.ReplaceAll(line, `""`, `"`)

		if err := json.Unmarshal([]byte(line), &obj); err != nil {
			fmt.Fprintf(os.Stderr, "error parsing line: %v\n", err)
			continue
		}

		fmt.Printf("[%s]: %f\n", obj["interval_start"], obj["indoor_temp"])
	}
	if err := scanner.Err(); err != nil {
		panic(err)
	}
}