Error with my ADXL 345 | Rat Rig Community [Unofficial] | Page 1

hasty sundial Feb 28, 2025, 5:49 PM

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I am getting this Invalid adxl345 id (got 0 vs e5).

I went on ahead and checked all my wiring and they all seem good, I even built a cable a shielded cat 5 because i saw online that this is prone to interferance.

barren hedgeBOT Feb 28, 2025, 5:49 PM

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harsh bloom Feb 28, 2025, 5:56 PM

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That error strongly suggests something wrong with the wiring, a short or a disconnect. The best advice I've found is this:
An easy way is to use the 4 twisted pairs in CAT5/6 cable so that each of the high speed lines (CLK, SDO, SDA) are in a separate twisted pair, with a ground wire in each pair. This is how I have wired it: Pair 1 - Orange/White is 3.3V, Orange CS; Pair 2 - Green/White Ground, Green SDA; Pair 3 - Blue/White Ground, Blue SDO; Pair 4 - Brown/White Ground, Brown CLK. It is important to connect the orange/white to the 3.3V pad on the ADXL break out board, not the VCC pad as that goes through the regulator and has an extra voltage drop. With this setup, I was able to work even with a 50' long CAT5 cable! It will certainly work for VCore3 500.

hasty sundial Feb 28, 2025, 6:00 PM

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let me go ahead and try this right now

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Hey @harsh bloom Question on the grounds

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your diagram shows all white wires are to be connected to ground

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how should I wire that up to the ADXL board

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also my board does not have CLK, only SCL? are those the same?

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@harsh bloom

harsh bloom Feb 28, 2025, 6:10 PM

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not my diagram, but if you send me a link i'll take a look.

hasty sundial Feb 28, 2025, 6:11 PM

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well im just trying to follow your wiring suggestion but i noticed my board does not have a CLK pin

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also how i am i going to wire all the grounds? do i solder them all to the ground pin of my adxl345 board?

harsh bloom Feb 28, 2025, 6:12 PM

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yes, tie all the grounds together

hasty sundial Feb 28, 2025, 6:13 PM

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thank you

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what about the CLK? is that the same as SCL?

harsh bloom Feb 28, 2025, 6:13 PM

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and SCL and CLK are the same yeah

hasty sundial Feb 28, 2025, 6:14 PM

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got it i will build my wire right now and try

harsh bloom Feb 28, 2025, 6:14 PM

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good luck!

hasty sundial Feb 28, 2025, 6:14 PM

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also do I have to configure anything on software for this to work?

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or is it plug and play once the adxl is connected right?

harsh bloom Feb 28, 2025, 6:16 PM

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You'll need to choose it in the cofigurator i think?

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Full disclosure, I didn't get my ADXL working, had the same error. But I was planning on using a toolboard with built-in accelerometer early so I didn't bother troubleshooting

hasty sundial Feb 28, 2025, 6:16 PM

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and where can i open the configurator

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sorry im a total noob on this

harsh bloom Feb 28, 2025, 6:17 PM

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My dad wired it up and I didn't feel like pointing out where he fucked up lol

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hasty sundial Feb 28, 2025, 6:17 PM

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i dont have that tab huhu

harsh bloom Feb 28, 2025, 6:18 PM

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oh, are you on ratos 2.0?

hasty sundial Feb 28, 2025, 6:18 PM

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yes

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2.0

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for a core v3

harsh bloom Feb 28, 2025, 6:18 PM

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go to ratos.local/config

hasty sundial Feb 28, 2025, 6:18 PM

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yes im here

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which cfg file should i open

harsh bloom Feb 28, 2025, 6:19 PM

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oh sorry that should be ratos.local/configure

hasty sundial Feb 28, 2025, 6:20 PM

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it opened a wizard

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is this the right page?

harsh bloom Feb 28, 2025, 6:20 PM

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Yeah

hasty sundial Feb 28, 2025, 6:20 PM

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harsh bloom Feb 28, 2025, 6:21 PM

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Hm. Maybe in 2.0 the adxl is configured purely in the printer.cfg then

hasty sundial Feb 28, 2025, 6:22 PM

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i see

harsh bloom Feb 28, 2025, 6:23 PM

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yeah, seems around line 125 you should have a line to uncomment

hasty sundial Feb 28, 2025, 6:24 PM

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harsh bloom Feb 28, 2025, 6:25 PM

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cool, seems good then. Hope your re-wiring fixes things

hasty sundial Feb 28, 2025, 6:25 PM

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tyyy man

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one last thing

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im just a little confused on the grounds

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so tie all my grounds in one bunch

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then plug into the only ground pin on the mainboard of ratrig right?

harsh bloom Feb 28, 2025, 6:28 PM

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yep

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might e easier to tie them together a few inches away and have only one wire crimped into the connectors

hasty sundial Feb 28, 2025, 6:29 PM

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exactly what im doing

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let me give this a try

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ur the greatest man

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appreciate ur input

harsh bloom Feb 28, 2025, 6:31 PM

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lets hope we get it actually working 😛

hasty sundial Feb 28, 2025, 7:04 PM

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@harsh bloom

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same error code

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twisted all the ground wires and slot them on ground header of the ratrig

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hasty sundial Feb 28, 2025, 7:23 PM

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i have 3 wires soldered to gnd lead on adxl

harsh bloom Feb 28, 2025, 7:23 PM

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afaik there isn't any jumpers or config for the thing, double check the soldering that there isn't any bridges?

hasty sundial Feb 28, 2025, 7:25 PM

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harsh bloom Feb 28, 2025, 7:30 PM

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looks clean to me

hasty sundial Feb 28, 2025, 7:30 PM

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hmm

harsh bloom Feb 28, 2025, 7:30 PM

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but its blurry, id grab a loupe

hasty sundial Feb 28, 2025, 7:30 PM

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so just making sure all the white wires are soldered to tne GND lead

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then i crimped all the ground wires in one dupont connector

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rn_image_picker_lib_temp_35310e51-8cd9-4c76-a544-2df7dceb0d25.jpg

hasty sundial Feb 28, 2025, 8:30 PM

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upp

#Error with my ADXL 345