I've used a Cantor Pairing Function to create unique numbers for each button matrix cell. These numbers are then converted to actions using a case switch in the main sketch file.
| Cols | 0 | 1 | 2 | 3 | 4 | |
|---|---|---|---|---|---|---|
| Rows | Pins | 14 (A0) | 15 (A1) | 16 (A2) | 17 (A3) | D11 |
| 0 | D5 | 204 Triangle | 225 Circle | 247 Up | 270 L2 | 147 L1 |
| 1 | D6 | 224 Square | 246 Cross | 269 Down | 293 R2 | 164 R1 |
| 2 | D7 | 245 Menu | 268 Options | 292 Left | 317 CAB- | 182 L3 |
| 3 | D8 | 267 Next | 291 PS | 316 Right | 342 CAB+ | 201 R3 |
| 4 | D9 | 290 Select | 315 Share | 341 - | 386 - | 221 - |
