It's time to fix Aqara battery bug

bcutter · February 4, 2024, 5:38pm

Well… as you can see here in the original DDF…

dresden-elektronik/deconz-rest-plugin/blob/master/devices/xiaomi/xiaomi_gzcgq01lm_light_sensor.json

{
  "schema": "devcap1.schema.json",
  "doc:path": "xiaomi/xiaomi_gzcgq01lm_light_sensor.md",
  "doc:hdr": "Light sensor GZCGQ01LM",
  "manufacturername": ["$MF_XIAOMI", "$MF_LUMI"],
  "modelid": ["lumi.sen_ill.mgl01", "lumi.sen_ill.mgl01"],
  "vendor": "Xiaomi",
  "product": "Mijia Light Sensor GZCGQ01LM",
  "status": "Gold",
  "md:known_issues": [ ],
  "sleeper": true,
  "subdevices": [
    {
      "type": "$TYPE_LIGHT_LEVEL_SENSOR",
      "restapi": "/sensors",
      "uuid": [
        "$address.ext",
        "0x01",
        "0x0400"
      ],

This file has been truncated. show original

…there is not such a part in this DDF. What I can see which looks interesting is this part:

        {
          "name": "config/battery",
          "awake": true,
          "parse": {
            "at": "0x00f7",
            "ep": 1,
            "fn": "xiaomi:special",
            "idx": "0x01",
            "script": "xiaomi_battery.js"
          }

So this seems to be “outsourced” to the xiaomi_battery.js script:

github.com

dresden-elektronik/deconz-rest-plugin/blob/master/devices/xiaomi/xiaomi_battery.js

/* global Attr, Item */

const vmin = 2700
const vmax = 3000
const v = Math.max(vmin, Math.min(Attr.val, vmax))
const bat = Math.round(((v - vmin) / (vmax - vmin)) * 100)
Item.val = Math.max(0, Math.min(bat, 100))

As I don’t want to change the xiaomi_battery.js - as it is likely used by other devices where I don’t want/need/must implement this workaround, but only for the gzcgq01lm light sensors:

How to properly source that part back in to the xiaomi_gzcgq01lm_light_sensor.json? Help appreciated @Smanar.