Battery Charging Checker

battery_sheet.sh

#! /vendor/bin/sh
# Copyright (C) 2023 Giovanni Ricca
# SPDX-License-Identifier: GPL-3.0-or-later

# vars
BATTERY_LEVEL_NODE="/sys/class/power_supply/battery/capacity"
TIME_TO_FULL_NODE="/sys/class/power_supply/battery/time_to_full_now"
POWER_NOW_NODE="/sys/class/power_supply/battery/power_now"
CURRENT_NOW_NODE="/sys/class/power_supply/battery/current_now"
OUTPUT_FILE="battery_chart.txt"

# functions
battery_data() {
  local unix_timestamp=$(date +%s)
  local battery_level=$(cat "$BATTERY_LEVEL_NODE")
  local time_to_full=$(cat "$TIME_TO_FULL_NODE")
  local power_now=$(cat "$POWER_NOW_NODE")
  local current_now=$(cat "$CURRENT_NOW_NODE")

  echo "$unix_timestamp | $battery_level | $time_to_full | $power_now | $current_now"
}

# Clear the output file
echo -e "# Timestamp | Battery Level | Time to Full | Power Now | Current Now\n" > "$OUTPUT_FILE"

while true; do
  battery_data >> "$OUTPUT_FILE"
  sleep 5
  if [ "$(cat $TIME_TO_FULL_NODE)" -eq 0 ]; then
    # Log battery stats for the last time
    battery_data >> "$OUTPUT_FILE"
    break
  fi
done