CAN-BUS Shield v1.2 + LCD Keypad Shield

Good Morning,
I’m quite new with Arduino and Can-BUS

I have bought two CAN-BUS Shield v1.2, I have tested (two shelds + two Arduino) with the example sketch “Send Blink - Receive Blink” form mcp_can.h library and it works fine.

Now in my project for the school I would setup a CAN BUS communication between 2 Arduino UNO boards in the following way:

  1. Sender: Arduino UNO + CAN-BUS Shield + temperature sensor
  2. Recevier: Arduino UNO + CAN-BUS Shield + LCD KeyPad Shield (I have this one available: DF Robots

When I test it connecting the LCD Shield upon the CAN-BUS Shield It doesn’t work , whitout the LCD it works, why?

I red documentation available and I have understood that on v1.2 the default CS pin is settled to D9 instead of D10 of the previous versions.

Where I can found the actual complete PIN allocation table for the CAN-BUS Shield v1.2?

For the LCD I have this:

LCD KeyPad Shield - Pin allocation Table
Analog 0 = Button (select, up, right, down and left)
Digital 4 = DB4
Digital 5 = DB5
Digital 6 = DB6
Digital 7 = DB7
Digital 8 = RS (Data or Signal Display Selection)
Digital 9 = Enable
Digital 10 = Backlit Control

Are there overlapping pins between the two shields? Is there risk to damage the Arduino board?

Thank you in advance for yor help,
Kind regards,

Looks that there’s some pins conflict, CAN Bus shield use D9(default, can be set to D10), and D11/12/13.
You can try solder a line to connect CS and D2, and remember to fix the code as well.
Have fun.

Ok thank you for your answer! :slight_smile:
Do you mean to solder a line to connect CS and D2 on the CAN-BUS Shield or on the LCD Shield? :confused:
D2 is not already used by the CAN-BUS Shield?

If I’ll be able to make my project work, I promise, I’ll post it on your recipe gallery :slight_smile: :sunglasses:

Thank you and Kind regards,