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Postby Alwin » Sun Feb 11, 2018 8:11 pm

Hi there,

my PiOT Relay Board has been working "in production" now over 6 months. A Raspi Zero should controlled the relays. A few days ago one or more relays started switching randomly themselves without instructed by the program. My first guess was voltage problems. I disassembled my self-made "device" and tested, but could not find any problems related to power. I also exchanged the Raspi to be sure the the Raspi hardware and program are working correctly.

I found out that the Relay board cannot be programmed any more. Pressing the pin select buttons gives no feedback on the display, i.e. it is more more customizable. The display shows randomly unidentified characters.

Is there a reset procedure? Power off obviously doesn't help.

Alwin
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Postby Dave » Mon Feb 12, 2018 10:37 am

Could you post your order ID please.

Could you also post a picture of the display please?

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Postby Alwin » Mon Feb 12, 2018 2:50 pm

Order ID: #196720

I powered on today and after 30 secs I could hear one relay click and the attached display.

remark: after boot no GPIO initialization was performed from the Raspi Zero.

Alwin
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Postby Dave » Mon Feb 12, 2018 3:14 pm

Are you able to test the Relay board on a fresh installation of Rasbian, using the provided example code - https://github.com/modmypi/PiOT-Relay-Board - and with nothing else plugged into the GPIO pins (looks like you've got a lot plugged in there) please.

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Postby Alwin » Mon Feb 12, 2018 3:24 pm

Yes, there are other switches and a LCD connected. As I said before it worked for over 6 months.

Yesterday I connected the relay board to a blank Jessi on a Raspi 3B ... with the same results.

And independent on the attached Raspi the relay board's buttons do not accept any input. i.e. I cannot even check the settings any more.

Alwin
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Postby Dave » Mon Feb 12, 2018 3:36 pm

Alwin wrote:Yes, there are other switches and a LCD connected. As I said before it worked for over 6 months.

Yesterday I connected the relay board to a blank Jessi on a Raspi 3B ... with the same results.

And independent on the attached Raspi the relay board's buttons do not accept any input. i.e. I cannot even check the settings any more.


Ah ok, not a problem. I will have sales contact you to arrange a return for a replacement.

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Postby Alwin » Mon Feb 12, 2018 3:40 pm

Thank you so much Dave!
I will wait for instructions on how to proceed.

Alwin
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Postby Dave » Thu Feb 15, 2018 2:26 pm

I have received and tested the board.

To begin with everything was working as expected, I could asign pins to each relays, I could manually test each of the relays, switching them on and off, I could programmatically do the same. Then out of no where the display started flickering around, pins got resigned, relays randomly started firing.

Think there must be a dodgey connection somewhere!

Anyway, to cut a long story short, I will have a replacement shipped out today for you :)

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Postby Alwin » Thu Feb 15, 2018 7:24 pm

Hehe, I already questioned my own arts of programming :)
Good that you also experienced the strange behaviour!

Thank you for the excellent service!

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