I have an Arduino UNO clone (Duinotech sold by Jaycar, Australia) with a similarly branded keypad shield with 2x16 LCD display. The project is for monitoring input / output voltages and currents of power conversion systems and calculating conversion efficiencies over a range of conditions.
This is my first ever Arduino project (in fact first ever micro project involving programming), but I have all hardware and software working OK.
The problem is, I want to display more groups of numbers than can easily fit on the 2X16 display. I do have a spare keypad board with a crook display (I broke it) and am wondering if I can replace the display board with a 4x20 device. This would give me enough display area. As far as I can see and from info found, the pin-outs and operating modes are identical.
Can someone confirm this? Is there a particular brand / type I need to get to ensure compatibility? What needs to change in the code - lcd.begin(16,2) to lcd.begin(20,4)???
I do want to keep the keypad shield as I use the push-buttons and the whole software / hardware set-up is built around it. I don’t want to restart the project to cater for a different display / push-button interface unless there is no alternative.
My apologies if this has been covered before, but looked through quite a few of the 500 odd pages without finding it. Not much specific info from a general web search.