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feat(heltec): solo dual-transport builds for Heltec V3/V4

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Port the Wio Tracker L1 solo firmware (full on-device UI, dual BLE/USB
companion transport) to Heltec V3 and V4 OLED boards. Neither board has
a joystick or CardKB on-board, so each new env wires up both as optional
peripherals with default pins from what the board leaves free, gated
behind the existing UI_HAS_JOYSTICK/ENV_PIN_SDA+SCL flags.

DUAL_SERIAL was nRF52-only; added an ESP32 helpers/esp32/DualSerialInterface.h
counterpart so the flag isn't silently ignored on these boards. On V4's
native USB CDC, isClientConnected() also honours (bool)Serial (real DTR),
same as the nRF52 version; V3 has no native CDC so it stays BLE-only there.

Screen (SDA 17/SCL 18) and CardKB (SDA 3/SCL 4) confirmed working on real
V4 hardware.

Co-Authored-By: Claude Sonnet 5 <noreply@anthropic.com>
This commit is contained in:
Jakub
2026-08-06 20:08:31 +02:00
co-authored by Claude Sonnet 5
parent f8b9e1acb8
commit 2bde84a573
10 changed files with 307 additions and 0 deletions
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variants/heltec_v4/target.h
+9
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@@ -25,6 +25,15 @@ extern EnvironmentSensorManager sensors;
#ifdef DISPLAY_CLASS
extern DISPLAY_CLASS display;
extern MomentaryButton user_btn;
#if UI_HAS_JOYSTICK
extern MomentaryButton joystick_left;
extern MomentaryButton joystick_right;
extern MomentaryButton back_btn;
#if UI_HAS_JOYSTICK_UPDOWN
extern MomentaryButton joystick_up;
extern MomentaryButton joystick_down;
#endif
#endif
#endif
bool radio_init();