[Solved] I2C and SI7021 does not show as connected

Hardware
1

Hello all,

Did a quick search didn’t find what I was looking for.

Raspberry Pi 3 Model B Rev 1.2
I2C connected and linked to SI7021h I have been trying to get this working, but it appears that it does not detect it…the SI7021 shows a power light and is connected. I just cannot get the PI to recognize that it is there…Any thoughts ?

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00: – -- – -- – -- – -- – -- – -- –
10: – -- – -- – -- – -- – -- – -- – -- – --
20: – -- – -- – -- – -- – -- – -- – -- – --
30: – -- – -- – -- – -- – -- – -- – -- – --
40: – -- – -- – -- – -- – -- – -- – -- – --
50: – -- – -- – -- – -- – -- – -- – -- – --
60: – -- – -- – -- – -- – -- – -- – -- – --
70: – -- – -- – -- – --

2

hi,
try this code


thanks

3

Traceback (most recent call last):
File “SI7021.py”, line 15, in
bus.write_byte(0x40, 0xF5)
IOError: [Errno 121] Remote I/O error

4

looks like an hardware issue.
can you share a picture of your setup?

5

Here you go.

pi
pi.jpg734×978 113 KB

6

is it a pi3b+?
the small chip on the pi shield look damaged, is it?
anyways you can send it for a warranty repair/testing.


thanks

7

does this not tell us what you are asking (sorry I am unsure how to tell) I do have SSH if needed. Also, I don’t see any damage on any chips. Just very dusty from sitting here for almost a year before I could get around to working with it. :slight_smile:

EDIT: Does this help ?
Hardware : BCM2835
Revision : a02082

8

no problem. i think we will need it here in the office for further inspection.

Thanks

9

uhhhhh, what do I have to do for that ?

10

you will need to fill out a RMA

11

Do you want the Pi as well ?

12

no just the Pi shield and the snesor :slight_smile:

13

heh, filling out RMA now. Thank you for all the help!