38 lines
1.2 KiB
Markdown
38 lines
1.2 KiB
Markdown
# ESP32 Serial Swiss Army Knife
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Universal wireless serial adaptor firmware for the ESP32-S3.
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## Initial hardware target
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- ESP32-S3-DevKitC-1
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- ESP32-S3-WROOM-1-N16R8 module
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- 16 MB flash
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- 8 MB octal PSRAM
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The initial smoke-test firmware continuously sweeps the onboard addressable RGB LED through the color wheel at reduced brightness. The official ESP32-S3-DevKitC-1 v1.0 uses GPIO48 for the LED data signal, while official v1.1 boards use GPIO38. Compatible boards and clones may vary.
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## Build
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```sh
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pio run
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```
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## Upload and monitor
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Connect the board's USB-to-UART port, then run:
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```sh
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pio run --target upload
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pio device monitor
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```
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The application logs its startup, detected PSRAM size, and configured RGB LED GPIO at 115200 baud. Expected output includes:
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```text
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ESP32-S3 build-chain smoke test started
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PSRAM initialized: 8388608 bytes
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Sweeping the onboard RGB LED on GPIO48
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```
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If the firmware runs but the RGB LED remains dark, verify the board revision. The project defaults to GPIO48, commonly used by DevKitC-compatible boards and official v1.0 boards. For an official v1.1 board — or another board wired that way — change `RGB_LED_GPIO` in `platformio.ini` from `48` to `38`, rebuild, and upload again.
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