Re: Multiple Blue&White 16x2 LCD+Keypad Kit for Raspberry Pi?
you can use as many as eight of these plates. addresses can be set by cutting some traces and shorting some pads on the back of the board under the mcp23017 chip.
matter of fact, a second i2c bus is brought on the unpopulated header between the cpu and the ethernet controller on the pi, so you could use 16.
"If I had known it was harmless, I would have killed it myself." - Phillip K. Dick, A Scanner Darkly