Document optional Nano TX to ESP RX wire

Co-Authored-By: Claude Opus 5.5 <noreply@anthropic.com>
2026-10-13 00:12:35 +02:00
1 parent 6e4d5e152b
commit c67a90ba09
@@ -78,3 +78,4 @@ pinout.
 | ROW_RESET | D13 |
 | ROW_SET | A5 |
 | Serial RX | D0 (from ESP32 TX) |
+| Serial TX | D1 (to ESP32 RX, through a 5 V → 3.3 V voltage divider). Optional: needed for `READY`. Without it, the ESP waits the full 3 s timeout. |