=== reverse engineering: software ===

original manufacturer's app:
https://play.google.com/store/apps/details?id=wit.android.ble.smartenergymeter
\\
conrad's app:
https://play.google.com/store/apps/details?id=cei.android.ble.smartenergymeter

<code>
[~/WiTenergy]$ ls -l *apk
1069410 cei.android.ble.smartenergymeter.apk
1107808 wit.android.ble.smartenergymeter.apk
</code>

the whole thing seems to be based on TI's "sensortag" app:
<code>
[~/WiTenergy]$ unzip -l wit.android.ble.smartenergymeter.apk 
  Length      Date    Time    Name
---------  ---------- -----   ----
   126976  2014-10-18 01:36   assets/SensorTagImgA.bin
   126976  2014-10-18 01:36   assets/SensorTagImgB.bin
[...]
</code>
<code>
[~/WiTenergy/wit.android.ble.smartenergymeter]$ grep -iE texas\|ti\|sensortag assets/*
assets/about.html:<meta name="Author" content="Texas Instruments" />
assets/about.html:<title>About BLE SensorTag</title>
assets/about.html:    <p><b>BLE SensorTag application</b> from <b>Texas Instruments</b> displays converted values from each of the six sensors
assets/about.html:    in the SensorTag. It also visualizes button presses. Up to four sensors may be used simultaneously (including keys).</p><hr />
assets/about.html:    <p class="copy">&copy; 2013-2014 Texas Instruments</p>
</code>