[Shimmer-users] Time Synchronization Shimmer3

[Paloma Vaquero]

Hello,



I’m trying to understand the synchronization technique explained at
“SDLog_for_Shimmer3_Firmware_User_Manual_rev0.5a.pdf”.

I’m using two Shimmer3 sensors, Master and Slave, enabling the time
synchronization. Parsing the binary data stored at the SD card, I obtain the
following information:

· Header size = 160 bytes (maybe the information related with
temperature and pressure calibration is missing, because 178 bytes are
defined at the document).

· Offset information (sign and magnitude) is present in both files
(master and slave) and values are always: 0xFF 0xFF 0xFF 0xFF 0xFF.



When I try to open the files using the SDLog application, the offset
information does not appear (see files attached).



I was also wondering if could it be possible to have in a room 4 sensors,
for instance, where Sensor1_Master1 only communicates with Sensor2_Slave1
and Sensor3_Master2 only communicates with Sensor4_Slave2 (for this purpose
I could use two different MAC addresses).





Thanks in advance. Regards,

Paloma.



--

Paloma Vaquero Quintana



Departamento de Teoría de la Señal y Comunicaciones

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Laboratorio 4.3.B.01

Universidad Carlos III de Madrid

Avda. de la Universidad 30

28911 Leganés - Madrid- España



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