How do I find the serial number for an accelerometer?

[Macneacail]

..

[Peter BENSCH]

There is no serial number in accelerometers, you can only read out which chip is inside by reading the register WHO_AM_I.

Does it answer your question?

Regards

/Peter

[Macneacail]

I suspected that was the answer, but I had said a short pray to the Norse gods. I am using MKI210 using a MKI109V3. It would be a nice feature as the accelerometers get put in specific places and tied to a SQL page, a unique number is nice.

Do you have an equivalent to the 109 with ethernet support, we want the acclerometers at a distance.

[Tesla DeLorean]

The STM32F401VE on the MKI109V3 would have a UNIQUE ID code

Ethernet boards using an STM32 would have that, and presumably a MAC address

Perhaps one could port the MKI109V3 like design to an F407 and add Ethernet, or find a chip/board level Ethernet + PHY + SOCKET all-in-one type solution.

[Peter BENSCH]

There is no ready-made solution for such a sensor board with Ethernet. You can, however, take one of the many DISCOVERY boards with an Ethernet port and connect a suitable sensor board to it. However, you would have to write the software yourself.

[Macneacail]

Smiling to oneself, I had to write the software to read your 109 in a useful format. Your manuals assume a high skill set. The UNICO GUI Lite is a challenge. There is a long step from your board to this graph.

What is a discovery board?

[Tesla DeLorean]

Discovery (DISCO) boards are relatively cheap evaluation boards.

https://www.st.com/en/evaluation-tools/32f769idiscovery.html

This for example has Ethernet + POE + Arduino Shield connector, perhaps more bulky and costly than desirable.

Some of the NUCLEO-144 boards would be cheaper, and are more of a breakout board, with relative little in bolted-on functionality.

https://www.st.com/en/evaluation-tools/nucleo-f429zi.html

If you could fabricate a simple accelerometer shield, these might be the way to go.

[Macneacail]

Can I connect the 109 accelerometer directly to the discovery board? We are replacing 2400 USD devices, the cost is not high.

The people I am working with, were smiling at the elastic hair bands I needed to use to hold the little connector from the 109 to the 210. Do you have a clip to hold them in place?

[Tesla DeLorean]

The MKI109V3 isn't my circus, not sure if you can update the firmware, or what functionality you're using.

If I wanted to map it onto some cheap Ethernet platform, I'd probably see if the USB and a RPi would be the way to go.

For a NUCLEO or DISCO, would probably look if I can get the BlueTooth pin headers mapped to USARTs on the host board. Perhaps fab a simple shield routing pins, and mapping to the headers such that it would plug in, and screw down.

[Macneacail]

One of the reasons for using the ST accelerometer is as a replacement for an industry standard EOL accelerometer, the CX1. This is the results from measuring thermal load using the 210 and the CX1.

This is not the same beam, that will take me a while. But the 210 has an interesting signal.

[Macneacail]

Some nice pictures coming from the 210 coupled with the 109. This is 51 FFT sets of 16384 points contoured using the CONREC package from Western Australia rewritten in C#. It is a 200 yr old wooden boat.

[Macneacail]

This is the FFT data, along with the selection of the critical peaks that are then color coded for use.