Compatibility of Shields (Arduino Ethernet Shield 2 and Seeed Studio Relay Shield v.3.0
Arduino Ethernet Shield 2 Compatibility
Compatibility Leonardo with ethernet shield 2
Wifi Vs Ethernet Shield
Hi,
I'm running into a strange issue with my code that seems to be related to the compatibility of shields and perhaps the pins they communicate with. I have code that uses the Ethernet shield 2 for communication with another board to control some motors. When I add the relay shield (i've tried on top as well as in the middle) the code no longer executes properly.
According to the pinout for the Ethernet shield it should only be using pins 13, 12, 11, 10 and potentially pin 4 for the SD card although I'm not using the SD card.
The communication with the motor controller uses pins 8 and 9
The relay board just uses pins 4,5,6, and 7 to control the relays.
It seems like pin 4 may be causing problems but the code doesn't interact with the SD card in any way, so that seems unlikely.
Has anyone else run into similar issues or have ideas I could test out? I suppose I could play with the pin assignment for the relays.
Thanks in advance for your help!