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Page: Beurer Sanitas
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Beurer Sanitas
Erik Johansson edited this page 2018-12-04 21:58:40 +01:00
Table of Contents

Protocol description for Beurer/Sanitas scales (code).

General

  • <sb>: start byte (e7 or f7)
  • <alt sb Y>: alternative start byte (eY or fY)
  • <uid>: user ID (8 bytes, BE)
  • <name>: 3 characters (bytes)
  • <timestamp>: unix timestamp (4 bytes)
  • <weight>: 2 bytes, BE (unit g / 50)
  • <impedance>: 2 bytes, BE

All protocol bytes are in hex. Writes are done to characteristic 0xffe1 on the service 0xffe0. This is also where notifications are received from.

Initialization

  1. Enable notifications.
  2. Write: <alt sb 6> 01
  3. Notification: <alt sb 6> 00 20
  4. Write: <alt sb 9> <timestamp>
  5. Write: <sb> 4f <uid>
  6. Notification: <sb> f0 4f <??> <battery> <wthr> <fthr> <unit> <ue> <urwe> <ume> <version>

<uid> can be given as all 0 (or other invalid user id) to query scale status only.

  • <battery>: battery level
  • <wthr>: weight threshold (unit g / 100)
  • <fthr>: fat threshold
  • <unit>: 1 = kg, 2 = lb, 4 = st
  • <ue>, <urwe>, <ume>: user (reference weight, measurement) exists
  • <version>: scale version

Configure threshold

  1. Write: <sb> 4e <wthr> <fthr>
  2. Notification: <sb> f0 4e 00

Thresholds in original app:

  • 0x28 0xdc (4.0 22.0)
  • 0x14 0xdc (2.0 22.0)
  • 0x0a 0x14 (1.0 2.0)

After scale reset: 0x14 0x14 (2.0 2.0)

Set unit

  1. Write: <sb> 4d <unit>
  2. Notification: <sb> f0 4d 00

Force disconnect

  1. Write: <alt sb a> 2

Users

Request user list

  1. Write: <sb> 33
  2. Notification: <sb> f0 33 00 <count> <max>
  3. Notification: <sb> 34 <count> <current> <uid> <name> <year>
  4. Write: <sb> f1 34 <count> <current>
  5. Goto 3 if <count> != <current>

Get user info

  1. Write: <sb> 36 <uid>
  2. Notification: <sb> f0 36 00 <name> <year> <month> <day> <height> <sex|activity>
  • <month>: January == 0
  • <sex|activity>: sex (female = 0x00, male = 0x80) | activity level 1 - 5

Add new user

  1. Write: <sb> 31 <uid> <name> <year> <month> <day> <height> <sex|activity>
  2. Notification: <sb> f0 31 00
  3. Perform initial measurement.

Status in notification: 00 (ok), 01 (full), 02 (uid taken), 03 (name used)

Update user

  1. Write: <sb> 35 <uid> ... (same as when adding user)
  2. Notification: <sb> f0 35 00

Delete user

  1. Write: <sb> 32 <uid>
  2. Notification: <sb> f0 32 00

Measurements

Perform measurement

  1. Write: <sb> 40 <uid>
  2. Notification: <sb> f0 40 00
  3. Notification: <sb> 58 <status> <weight>
  4. Write: <sb> f1 58 <status> <weight MSB>
  5. Goto 3 if <status> != 0
  6. Notification: <sb> 59 <count> <current> 01 <uid>
  7. Write: <sb> f1 59 <count> <current>
  8. Notification: <sb> 59 <count> <current> <11 bytes data>
  9. Write: <sb> f1 59 <count> <current>
  10. Goto 8 if <count> != <current>
  • Step 1 selects the user with the given ID.
  • <status>: 0 for stable measurement, 1 otherwise
  • All <data> from step 8 is joined and parsed as a measurement.

Request saved measurements

  1. Write: <sb> 41 <uid>
  2. Notification: <sb> f0 41 <count> 00
  3. Notification: <sb> 42 <count> <current> <11 bytes data>
  4. Write: <sb> f1 42 <count> <current>
  5. Goto 3 if <count> != <current>
  • All <data> from step 3 is joined and parsed as <count> / 2 measurement(s).

Delete saved measurements

  1. Write: <sb> 43 <uid>
  2. Notification: <sb> f0 43 00

Measurement

22 bytes of data:

<timestamp> <weight> <impedance> <fat> <water> <muscle> <bone> <BMR> <AMR> <BMI>

Unknown measurements

Request unknown measurements

  1. Write: <sb> 46
  2. Notification: <sb> f0 46 00
  3. Notification: <sb> 47 <count> <current> <mem> <timestamp> <weight> <impedance>
  4. Write: <sb> f1 47 <count> <current>
  5. Goto 3 if <count> != <current>
  • <mem>: index in memory (stays constant after removal)

Assign unknown measurement

  1. Write: <sb> 4b <uid> <timestamp> <weight> <impedance> <mem>
  2. Notification: <sb> f0 4b 00
  3. Notification: <sb> 4c <count> <current> <11 bytes data>
  4. Write: <sb> f1 4c <count> <current>
  5. Goto 3 if <count> != <current>
  • All <data> from step 3 is joined and parsed as a measurement.

Delete unknown measurement

  1. Write: <sb> 49 <mem>
  2. Notification: <sb> f0 49 00

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