diff --git a/Custom-Bluetooth-Scale.md b/Custom-Bluetooth-Scale.md index ab17434..2212199 100644 --- a/Custom-Bluetooth-Scale.md +++ b/Custom-Bluetooth-Scale.md @@ -1,7 +1,7 @@ @@ -9,14 +9,14 @@ - -image missing
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Figure A: Final result of the hacked bathroom scale (front) - -image missing
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Figure B: Final result of the hacked bathroom scale (back) @@ -31,21 +31,21 @@ Nowadays all smartphones supports Bluetooth 4.x and not Bluetooth 3.x anymore, s - -image missing
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Figure 7.1: HM-10 Bluetooth 4.x module (front) - -image missing
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Figure 7.2: HM-10 Bluetooth 4.x module (back) -Luckily, we don't need to change anything because we can use the same pins as for the HC-05. For the HM-10 configuration we can also use the same Arduino sketch and parameters like in the chapter [Connecting a HC-05 Bluetooth module](Custom-Bluetooth-Scale/_edit#connecting-a-hc-05-bluetooth-module-to-a-tablet) (only change "both NL & CR" back to "no line ending"). It is even slightly easier because we don't have to pull high a KEY pin anymore. You can find the AT commands in the [HM-10 manual](https://github.com/oliexdev/openScale/blob/master/doc/custom_scale/hm_10/HM_10_Manual.pdf). For example to change the Bluetooth device name to `openScale` send the AT command `AT+NAMEopenScale` to the HM-10 module. +Luckily, we don't need to change anything because we can use the same pins as for the HC-05. For the HM-10 configuration we can also use the same Arduino sketch and parameters like in the chapter [Connecting a HC-05 Bluetooth module](Custom-Bluetooth-Scale/_edit#connecting-a-hc-05-bluetooth-module-to-a-tablet) (only change "both NL & CR" back to "no line ending"). It is even slightly easier because we don't have to pull high a KEY pin anymore. You can find the AT commands in the [HM-10 manual](../blob/master/doc/custom_scale/hm_10/HM_10_Manual.pdf). For example to change the Bluetooth device name to `openScale` send the AT command `AT+NAMEopenScale` to the HM-10 module. ## Reducing the power consumption @@ -121,11 +121,11 @@ To minimize the power consumption a bit more I soldered out the power LED on the | Active | 48mA | | Sleep | 0.035mA | -So in the end I could power supply the Arduino for around 3 years with the 4 AAA batteries (960mAh). To power down all external modules, like the Bluetooth, EEPROM, RTC module, while the Arduino is in sleeping mode I used an external [BC546 NPN Transistor](https://github.com/oliexdev/openScale/raw/master/doc/bc546_transistor/bc546_datasheetpdf) as a switch. I connected the transistor as in figure 6.1 or figure 2.4. +So in the end I could power supply the Arduino for around 3 years with the 4 AAA batteries (960mAh). To power down all external modules, like the Bluetooth, EEPROM, RTC module, while the Arduino is in sleeping mode I used an external [BC546 NPN Transistor](../blob/master/doc/bc546_transistor/bc546_datasheetpdf) as a switch. I connected the transistor as in figure 6.1 or figure 2.4.

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Figure 6.1: Schematic of the BC546 NPN Transistor

@@ -198,26 +198,26 @@ Note in figure 2.4 that I power supply the bathroom scale with the 4 AAA batteri ## Adding external I²C EEPROM -For temporally storing the measured values, even if the power supply is disconnected, I used an external [512 Kbit I²C EEPROM 24LC512](https://github.com/oliexdev/openScale/raw/master/doc/eeprom_24lc512/24lc512_datasheet.pdf), see figure 5.2-5.3. +For temporally storing the measured values, even if the power supply is disconnected, I used an external [512 Kbit I²C EEPROM 24LC512](../blob/master/doc/eeprom_24lc512/24lc512_datasheet.pdf), see figure 5.2-5.3. @@ -379,14 +379,14 @@ This time I bought a different [I²C RTC module](http://www.roboter-bausatz.de/3 @@ -441,14 +441,14 @@ For a wireless connection from my scale to my Nexus 10 tablet I am using a HC-05 @@ -486,7 +486,7 @@ For changing the default parameters I had to send AT commands to the Bluetooth m | RXD | 8 | | KEY | 6 | -The KEY pin has to be pulled high to enter AT mode of the HC-05 Bluetooth module. Sometimes the KEY pin is not on the breakout board. If that the case you have to solder a wire directly to pin 34 on the HC-05 module, see the [HC-05 Manual](https://github.com/oliexdev/openScale/raw/master/doc/hc_05/HC_05_Manual.pdf) for more details. The default baud rate in AT command mode is 38400 bits/s. Use the following sketch to configure the HC-05 Bluetooth module: +The KEY pin has to be pulled high to enter AT mode of the HC-05 Bluetooth module. Sometimes the KEY pin is not on the breakout board. If that the case you have to solder a wire directly to pin 34 on the HC-05 module, see the [HC-05 Manual](../blob/master/doc/hc_05/HC_05_Manual.pdf) for more details. The default baud rate in AT command mode is 38400 bits/s. Use the following sketch to configure the HC-05 Bluetooth module: ```C #include @@ -520,7 +520,7 @@ void loop() } ``` -If you successfully in the AT mode the HC-05 Bluetooth module LED blinks every 2 seconds. Open the Serial Monitor in the Arduino IDE under Tools->Serial Monitor. Change "no line ending " to "both NL & CR" found just beside the baud rate. Now you can send a test command with `AT` if everything works fine you should receive a `OK`. Following is a short summary of the most important AT commands of the available [HC-05 AT Commands](https://github.com/oliexdev/openScale/raw/master/doc/hc_05/HC_05_AT_Commands.pdf): +If you successfully in the AT mode the HC-05 Bluetooth module LED blinks every 2 seconds. Open the Serial Monitor in the Arduino IDE under Tools->Serial Monitor. Change "no line ending " to "both NL & CR" found just beside the baud rate. Now you can send a test command with `AT` if everything works fine you should receive a `OK`. Following is a short summary of the most important AT commands of the available [HC-05 AT Commands](../blob/master/doc/hc_05/HC_05_AT_Commands.pdf): | AT command | Response | Parameter | Comment | |:----------:|:--------:|:---------:|:-------:| @@ -542,20 +542,20 @@ In the previous step we had successful reverse engineered the scale's display. T @@ -577,8 +577,8 @@ Note that I used 3.3V (see pin 3V3 on figure 2.3) from the CP2102 converter boar I connected the scale's display connector to the Arduino Pro Mini as the following schematic:

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Figure 2.4: Schematic overview of the openScale project

@@ -903,8 +903,8 @@ Note to save memory usage the measured values are stored as integers and not as First of all I had to find a suitable bathroom scale that I wanted to reverse engineer. I was searching for a cheap bathroom scale that can analyse not only my weight but also my body fat, water and muscle. The scale design should be clear and the display of the scale should have some kind of a simple seven segment display (I hoped that a simple display would be easier to reverse engineer). The [Sanitas SBF12 scale](http://www.sanitas-online.de/web/en/products/weight/SBF12.php) that I found in a department store seemed to be right for my purpose. So I bought one for only 20€ (around 25$), see figure 1.1.

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Figure 1.1: Sanitas SBF 12 scale

@@ -914,20 +914,20 @@ To gain access to the inside of the scale I had to unscrew only a few screws on @@ -943,20 +943,20 @@ The first step was to connect all pins with wires that are routed to the display @@ -965,20 +965,20 @@ The first step was to connect all pins with wires that are routed to the display @@ -988,8 +988,8 @@ The first step was to connect all pins with wires that are routed to the display Next step is to analyse the signals that are controlling the display. I had the opportunity to use a 16 digital channels oscilloscope ([Agilent Technologies MSO7014B](http://www.keysight.com/en/pd-1788165-pn-MSO7014B/mixed-signal-oscilloscope-100-mhz-4-analog-plus-16-digital-channels)) for this step, see figure 1.11. Alternative you can use a microcontroller like [Arduino](http://www.arduino.cc/) to read the signals.

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Figure 1.11: The 16 digital channels oscilloscope for analysing the signals

@@ -1022,20 +1022,20 @@ The question for the reverse engineering process was how the signals would respo @@ -1044,20 +1044,20 @@ The question for the reverse engineering process was how the signals would respo @@ -1066,20 +1066,20 @@ The question for the reverse engineering process was how the signals would respo @@ -1088,20 +1088,20 @@ The question for the reverse engineering process was how the signals would respo @@ -1113,8 +1113,8 @@ For decoding the 8 Bit word I compared the recorded signals. I first chose two n
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Figure 5.1: Schematic of the 24LC512 I²C EEPROM 		- -image missing
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Figure 5.2: I²C EEPROM module (front) 		- -image missing
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Figure 5.3: I²C EEPROM module (back)
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Figure 4.1: I²C RTC module (front) 		- -image missing
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Figure 4.2: I²C RTC module (back)
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Figure 3.1: HC-05 Bluetooth module (front) 		- -image missing
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Figure 3.2: HC-05 Bluetooth module (back)
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Figure 2.1: Arduino Pro Mini board 		- -image missing
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Figure 2.2: CP2102 USB to Serial converter (front) 		- -image missing
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Figure 2.3: CP2102 USB to Serial converter (back)
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Figure 1.2: Scale overview 		- -image missing
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Figure 1.3: Back side of the circuit board 		- -image missing
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Figure 1.4: Front side of the circuit board
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Figure 1.5: Connected wires unordered 		- -image missing
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Figure 1.6: Connected wires ordered 		- -image missing
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Figure 1.7: Back side of the scale wired
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Figure 1.8: Front side of the scale wired 		- -image missing
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Figure 1.9: Attached notes to the wires 		- -image missing
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Figure 1.10: Pin layout of the display connector
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Figure 1.12: signals of value "P-01" 		- -image missing
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Figure 1.13: signals of value "P-02" 		- -image missing
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Figure 1.14: signals of value "P-03"
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Figure 1.15: signals of value "P-04" 		- -image missing
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Figure 1.16: signals of value "P-05" 		- -image missing
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Figure 1.17: signals of value "P-06"
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Figure 1.18: signals of value "P-07" 		- -image missing
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Figure 1.19: signals of value "P-08" 		- -image missing
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Figure 1.20: signals of value "P-09"
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Figure 1.21: signals of value "0.0 kg" 		- -image missing
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Figure 1.22: signals while displaying the person symbol, see signal on D8 and D9 		- -image missing
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Figure 1.23: signals while displaying the person and age symbol, see signal D8 and D9
diff --git a/Frequently-Asked-Questions-(FAQ).md b/Frequently-Asked-Questions-(FAQ).md index 2f4f7b0..69ca25b 100644 --- a/Frequently-Asked-Questions-(FAQ).md +++ b/Frequently-Asked-Questions-(FAQ).md @@ -15,7 +15,7 @@ Personally I don't want to synchronise any health data to a company for privacy ## Why is my language xyz is missing or incomplete? -I don't speak every language. If your language is missing or incomplete please translate the [strings.xml](https://github.com/oliexdev/openScale/blob/master/android_app/app/src/main/res/values/strings.xml) into your language and then create a pull request on GitHub or use [Weblate](https://hosted.weblate.org/engage/openscale/?utm_source=widget) to translate the app. The current translation status for openScale is as follow: +I don't speak every language. If your language is missing or incomplete please translate the [strings.xml](../blob/master/android_app/app/src/main/res/values/strings.xml) into your language and then create a pull request on GitHub or use [Weblate](https://hosted.weblate.org/engage/openscale/?utm_source=widget) to translate the app. The current translation status for openScale is as follow: [![Translation status](https://hosted.weblate.org/widgets/openscale/-/multi-auto.svg)](https://hosted.weblate.org/engage/openscale/?utm_source=widget) diff --git a/Home.md b/Home.md index 099b3d5..bd61e10 100644 --- a/Home.md +++ b/Home.md @@ -1,7 +1,7 @@ diff --git a/Medisana-BS444.md b/Medisana-BS444.md index 886cf60..2d7ce0d 100644 --- a/Medisana-BS444.md +++ b/Medisana-BS444.md @@ -1,6 +1,6 @@

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Medisana BS444 (front)

diff --git a/Supported-scales-in-openScale.md b/Supported-scales-in-openScale.md index f25f230..12a7622 100644 --- a/Supported-scales-in-openScale.md +++ b/Supported-scales-in-openScale.md @@ -156,13 +156,13 @@ _Please select a scale for further information_ @@ -172,12 +172,12 @@ _Please select a scale for further information_ @@ -186,24 +186,24 @@ _Please select a scale for further information_ @@ -212,25 +212,25 @@ _Please select a scale for further information_ @@ -238,12 +238,12 @@ _Please select a scale for further information_ @@ -251,36 +251,36 @@ _Please select a scale for further information_ @@ -288,7 +288,7 @@ _Please select a scale for further information_ diff --git a/Xiaomi-Bluetooth-Mi-Scale.md b/Xiaomi-Bluetooth-Mi-Scale.md index 0329c19..55b4350 100644 --- a/Xiaomi-Bluetooth-Mi-Scale.md +++ b/Xiaomi-Bluetooth-Mi-Scale.md @@ -1,6 +1,6 @@

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Xiaomi Mi Scale (front)

@@ -38,8 +38,8 @@ Unfortunately I could only receive the weight data if a user was on the scale an For capturing the transmission I turned on the `Bluetooth HCI Snoop Log` under the developer options on my smartphone and started the Mi Fit App. Make sure you turn off your Bluetooth before your turn on the log and if you want to turn it off do it in reverse order. For the analysing step I opened the saved log with [wireshark](https://www.wireshark.org/). Please note that you should use a version > 1.10. The recent version supported Bluetooth much better!

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Analysing initialization process with wireshark

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Figure 1.24: seven segment display 		-image missing
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Custom Bluetooth scale 		-image missing
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Xiaomi Mi scale v1 		-image missing
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Medisana BS444 scale 		-image missing
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Sanitas SBF70
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Digoo DG-S038H 		-image missing
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Yunmai Mini
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Excelvan CF369BLE 		-image missing
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Yunmai SE
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MGB
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Xiaomi Mi scale v2
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Exingtech Y1 		-image missing
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Beurer BF700/800
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Silvercrest SBF75 		-image missing
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Runtastic Libra
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Hesley (Yunchen) scale 		-image missing
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iHealth HS3
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Beurer BF710 		-image missing
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Easy Home 64050
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Medisana BS440 		-image missing
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Accuway
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Excelvan CF366BLE