CJ125 error with SD-card

[EBSolution]

Good evening,
I use the lambda Shield with an official Arduino Mega.
I use 12V 2A on the arduino DC input and connect lambda Shield using X7 connector.

When i start the sample code I have only CJ125 Error 0xFFFFFF.

Any Idea what's happening?
Thanks for your help.

[Christian_Bylund]

Good evening,
I use the lambda Shield with an official Arduino Mega.
I use 12V 2A on the arduino DC input and connect lambda Shield using X7 connector.

When i start the sample code I have only CJ125 Error 0xFFFFFF.

Any Idea what's happening?
Thanks for your help.

Hi EBSolution, are you using the original Lambda Shield or the Lambda Shield 2?

Thank you.

[EBSolution]

It is the lambda Shield 2

[Christian_Bylund]

It is the lambda Shield 2

This indicates that there is a problem with SPI communication.

1. Can you please share a picture of your set up?
2. Are you using the example code without modifications?

Thank you.

[EBSolution]

Hi,

I've found the reason: i have an sd Card reader connected to the SPI BUS using pins 50 to 52 and Chip Select pin 53.
If I disconnect this SD card Reader, everything works fine.

I see that CJ125 SPI communication uses pin 10.

The SD SPI communication don't specify any chip select so it should be pin 53 for arduino Mega.
How can I use both Lambda shield2 and sd card reader on a Mega board?

Thanks for your quick replies and have a good day.

EBS

[Christian_Bylund]

Excellent, then I can tell you that you may also have a problem with the SD-card adapter.

Have a look at this video for more information on how to use a SD-card sharing the SPI bus with the CJ125.

Thank you.