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-===== Wittech WiTenergy E100 ===== 
  
-{{ :hardware:channels:meters:power:wittech_witenergy_e100:witenergy_grass.jpg?200|}} 
- 
-=== General === 
-http://en.wikipedia.org/wiki/Bluetooth_low_energy 
- 
-=== Info === 
- 
-Distributed by Conrad Elektronik as "Voltcraft SEM-3600BT": 
-http://www.conrad.de/ce/de/product/684997/VOLTCRAFT-SEM-3600BT 
- 
-Review by c't: http://www.heise.de/ct/ausgabe/2014-9-kurz-vorgestellt-Messstecker-2226733.html 
- 
-Review: http://www.smarthelpers.de/equipment/voltcraft-sem-3600bt-das-smarte-energiekostenmessgerat.html 
- 
-original vz-dev thread: http://lists.volkszaehler.org/pipermail/volkszaehler-dev/2015-April/004413.html 
- 
- 
-=== Background === 
-Development: http://www.wittech-group.com/ 
- 
-Manufacturing: http://www.colourhk.com/products.htm 
- 
-==== reverse engineering: hardware ==== 
-=== PCB pictures === 
-== control board ==  
- 
-{{:hardware:channels:meters:power:wittech_witenergy_e100:control_comp.jpg?200|}} 
-{{:hardware:channels:meters:power:wittech_witenergy_e100:control_sold.jpg?200|}} 
- 
-== power board == 
- 
-{{:hardware:channels:meters:power:wittech_witenergy_e100:power_comp.jpg?200|}} 
-{{:hardware:channels:meters:power:wittech_witenergy_e100:power_solder.jpg?200|}} 
- 
-=== general === 
-einmal aufgeschraubt, findet man auf der platine den namen des 
-chinesischen OEMs: 
-http://www.colourhk.com/products.htm 
-das geraet heisst dann wohl "WiTenergy", 
-ist auf der produktliste nicht enthalten. 
-(lustigerweise scheint das "EM200 WiTmeter" eine BT-version des kd302 
- zu sein, gleiches gehaeuse zumindest.) 
- 
-auch gleich ein uebler produktionsmangel... die pufferbatterie ist so 
-schlecht verloetet, dass sie von der platine faellt. 
- 
-=== metering IC === 
-{{:hardware:channels:meters:power:wittech_witenergy_e100:metering.jpg?200|}}\\ 
-darin wohl wieder ein metering-IC, allerdings nur in einem 16-poligen 
-SOIC-gehaeuse, mit abgeschliffener beschriftung, 
-aber mit einem 4.096MHz quarz daneben, was zumindest einen 
-recht intelligenten chip nahelegt. 
- 
-=== bluetooth / controller (itl254x) === 
-{{:hardware:channels:meters:power:wittech_witenergy_e100:itl254x.jpg?200|}}\\ 
-there's no separate controller, it seems the controller on the bluetooth module runs the whole device. 
-(which is an obvious choice, as those tend to be more powerful than an average microcontroller anyway.) 
- 
-seems to be a TI device, related to the TI "SensorTag" reference design: 
-http://www.ti.com/product/cc2540 
-http://www.ti.com/tool/cc2541dk-sensor 
- 
-=== eeprom === 
-{{:hardware:channels:meters:power:wittech_witenergy_e100:eeprom.jpg?200|}}\\ 
-labeled "ATML" instead of "ATMEL"? wtf? 
- 
-=== power supply === 
-{{:hardware:channels:meters:power:wittech_witenergy_e100:lnk304.jpg?200|}}\\ 
-switching power supply without isolation? 
- 
-LNK304: http://www.datasheet4u.com/datasheet-pdf/PowerIntegrations/LNK304/pdf.php?id=602595 
- 
-==== reverse engineering: communication ==== 
- 
-das geraet benutzt die low-energy variante die bei BT 4.0 spezifiziert 
-ist, und nicht zu aelteren bluetooth-interfaces kompatibel ist: 
-http://en.wikipedia.org/wiki/Bluetooth_low_energy 
- 
-(es erscheint etwas witzlos, bei einem geraet das per definition 
- am aus dem stromnetz versorgt wird, das low-energy profile zu 
- verwenden, das fuer batteriebetriebene geraete entwickelt wurde... 
- die verlustleistung des netzteils ist damit sicher deutlich hoeher, 
- als der verbrauch des geraetes...) 
- 
-<code> 
-# hcitool lescan 
-LE Scan ... 
-D0:FF:50:7A:73:6C (unknown) 
-D0:FF:50:7A:73:6C WiT Power Meter 
-</code> 
-<code> 
-# gatttool -b D0:FF:50:7A:73:6C --primary 
-attr handle = 0x0001, end grp handle = 0x000b uuid: 00001800-0000-1000-8000-00805f9b34fb 
-attr handle = 0x000c, end grp handle = 0x000f uuid: 00001801-0000-1000-8000-00805f9b34fb 
-attr handle = 0x0010, end grp handle = 0x0019 uuid: 0000fee0-494c-4f47-4943-544543480000 
-attr handle = 0x001a, end grp handle = 0xffff uuid: 0000180a-0000-1000-8000-00805f9b34fb 
-</code> 
-<code> 
-# gatttool -b D0:FF:50:7A:73:6C --characteristics 
-handle = 0x0002, char properties = 0x02, char value handle = 0x0003, uuid = 00002a00-0000-1000-8000-00805f9b34fb 
-handle = 0x0004, char properties = 0x02, char value handle = 0x0005, uuid = 00002a01-0000-1000-8000-00805f9b34fb 
-handle = 0x0006, char properties = 0x0a, char value handle = 0x0007, uuid = 00002a02-0000-1000-8000-00805f9b34fb 
-handle = 0x0008, char properties = 0x08, char value handle = 0x0009, uuid = 00002a03-0000-1000-8000-00805f9b34fb 
-handle = 0x000a, char properties = 0x02, char value handle = 0x000b, uuid = 00002a04-0000-1000-8000-00805f9b34fb 
-handle = 0x000d, char properties = 0x20, char value handle = 0x000e, uuid = 00002a05-0000-1000-8000-00805f9b34fb 
-handle = 0x0011, char properties = 0x12, char value handle = 0x0012, uuid = 0000fee1-494c-4f47-4943-544543480000 
-handle = 0x0014, char properties = 0x1a, char value handle = 0x0015, uuid = 0000fee2-494c-4f47-4943-544543480000 
-handle = 0x0017, char properties = 0x1a, char value handle = 0x0018, uuid = 0000fee3-494c-4f47-4943-544543480000 
-handle = 0x001b, char properties = 0x02, char value handle = 0x001c, uuid = 00002a23-0000-1000-8000-00805f9b34fb 
-handle = 0x001d, char properties = 0x02, char value handle = 0x001e, uuid = 00002a24-0000-1000-8000-00805f9b34fb 
-handle = 0x001f, char properties = 0x02, char value handle = 0x0020, uuid = 00002a25-0000-1000-8000-00805f9b34fb 
-handle = 0x0021, char properties = 0x02, char value handle = 0x0022, uuid = 00002a26-0000-1000-8000-00805f9b34fb 
-handle = 0x0023, char properties = 0x02, char value handle = 0x0024, uuid = 00002a27-0000-1000-8000-00805f9b34fb 
-handle = 0x0025, char properties = 0x02, char value handle = 0x0026, uuid = 00002a28-0000-1000-8000-00805f9b34fb 
-handle = 0x0027, char properties = 0x02, char value handle = 0x0028, uuid = 00002a29-0000-1000-8000-00805f9b34fb 
-</code> 
-<code> 
-# gatttool -b D0:FF:50:7A:73:6C --char-desc 
-handle = 0x0001, uuid = 00002800-0000-1000-8000-00805f9b34fb 
-handle = 0x0002, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x0003, uuid = 00002a00-0000-1000-8000-00805f9b34fb 
-handle = 0x0004, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x0005, uuid = 00002a01-0000-1000-8000-00805f9b34fb 
-handle = 0x0006, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x0007, uuid = 00002a02-0000-1000-8000-00805f9b34fb 
-handle = 0x0008, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x0009, uuid = 00002a03-0000-1000-8000-00805f9b34fb 
-handle = 0x000a, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x000b, uuid = 00002a04-0000-1000-8000-00805f9b34fb 
-handle = 0x000c, uuid = 00002800-0000-1000-8000-00805f9b34fb 
-handle = 0x000d, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x000e, uuid = 00002a05-0000-1000-8000-00805f9b34fb 
-handle = 0x000f, uuid = 00002902-0000-1000-8000-00805f9b34fb 
-handle = 0x0010, uuid = 00002800-0000-1000-8000-00805f9b34fb 
-handle = 0x0011, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x0012, uuid = 0000fee1-494c-4f47-4943-544543480000 
-handle = 0x0013, uuid = 00002902-0000-1000-8000-00805f9b34fb 
-handle = 0x0014, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x0015, uuid = 0000fee2-494c-4f47-4943-544543480000 
-handle = 0x0016, uuid = 00002902-0000-1000-8000-00805f9b34fb 
-handle = 0x0017, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x0018, uuid = 0000fee3-494c-4f47-4943-544543480000 
-handle = 0x0019, uuid = 00002902-0000-1000-8000-00805f9b34fb 
-handle = 0x001a, uuid = 00002800-0000-1000-8000-00805f9b34fb 
-handle = 0x001b, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x001c, uuid = 00002a23-0000-1000-8000-00805f9b34fb 
-handle = 0x001d, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x001e, uuid = 00002a24-0000-1000-8000-00805f9b34fb 
-handle = 0x001f, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x0020, uuid = 00002a25-0000-1000-8000-00805f9b34fb 
-handle = 0x0021, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x0022, uuid = 00002a26-0000-1000-8000-00805f9b34fb 
-handle = 0x0023, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x0024, uuid = 00002a27-0000-1000-8000-00805f9b34fb 
-handle = 0x0025, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x0026, uuid = 00002a28-0000-1000-8000-00805f9b34fb 
-handle = 0x0027, uuid = 00002803-0000-1000-8000-00805f9b34fb 
-handle = 0x0028, uuid = 00002a29-0000-1000-8000-00805f9b34fb 
-</code> 
-<code> 
-# for x in $(seq 1 40) ;do gatttool -b D0:FF:50:7A:73:6C --char-read -a $x | sed s,.*:,$x:\ ,;sleep .05 ; done 
-01:  00 18 
-02:  02 03 00 00 2a 
-03:  57 69 54 20 50 6f 77 65 72 20 4d 65 74 65 72 "WiT Power Meter" 
-04:  02 05 00 01 2a 
-05:  00 00 
-06:  0a 07 00 02 2a 
-07:  00 
-08:  08 09 00 03 2a 
-09: Characteristic value/descriptor read failed: Attribute can't be read 
-0A:  02 0b 00 04 2a 
-0B:  50 00 a0 00 00 00 e8 03 
-0C:  01 18 
-0D:  20 0e 00 05 2a 
-0E: Characteristic value/descriptor read failed: Attribute can't be read 
-0F:  00 00 
-10:  00 00 48 43 45 54 43 49 47 4f 4c 49 e0 fe 00 00 
-11:  12 12 00 00 00 48 43 45 54 43 49 47 4f 4c 49 e1 fe 00 00 
-12:  00 
-13:  00 00 
-14:  1a 15 00 00 00 48 43 45 54 43 49 47 4f 4c 49 e2 fe 00 00 
-15:  23 03 42 00 00 00 00 00 00 10 00 00 05 00 87 00 00 00 00 
-16:  00 00 
-17:  1a 18 00 00 00 48 43 45 54 43 49 47 4f 4c 49 e3 fe 00 00 
-18:  00 
-19:  00 00 
-1A:  0a 18 
-1B:  02 1c 00 23 2a 
-1C:  6c 73 7a 00 00 50 ff d0 
-1D:  02 1e 00 24 2a 
-1E:  57 49 54 20 45 31 30 30 00 
-1F:  02 20 00 25 2a 
-20: 53 4e 3a 20 30 30 30 30 30 30 00 "SN: 000000" 
-21:  02 22 00 26 2a 
-22: 46 2f 57 3a 20 56 30 31 2e 33 32 00 "F/W: V01.32" 
-23:  02 24 00 27 2a 
-24: 48 2f 57 3a 20 56 30 30 2e 30 30 00 "H/W: V00.00" 
-25:  02 26 00 28 2a 
-26: 53 2f 57 3a 20 56 30 30 2e 31 31 00 "S/W: V00.11" 
-27:  02 28 00 29 2a 
-28: 57 69 74 74 65 63 68 20 43 6f 6d 70 61 6e 79 20 4c 74 64 2e 00 "Wittech Company " 
-</code> 
-<code> 
-48 43 45 54 43 49 47 4f 4c 49 "HCETCIGOLI" 
-</code> 
- 
-==== 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> 
hardware/channels/meters/power/wittech_witenergy_e100.txt · Zuletzt geändert: 2023/03/28 16:49 von r00t