# hello-t-energy-s3

Minimal test sketch for LilyGo T-Energy-S3 board.

## Setup (one-time)

```bash
# Add ESP32 board manager
arduino-cli config init
arduino-cli config add board_manager.additional_urls https://espressif.github.io/arduino-esp32/package_esp32_index.json

# Install ESP32 core
arduino-cli core update-index
arduino-cli core install esp32:esp32
```

## Build & Upload

```bash
# Find your port
arduino-cli board list

# Compile
arduino-cli compile --fqbn "esp32:esp32:esp32s3:CDCOnBoot=cdc,FlashSize=16M,PSRAM=opi" .

# Upload (replace /dev/ttyACM0 with your port)
arduino-cli upload --fqbn "esp32:esp32:esp32s3:CDCOnBoot=cdc,FlashSize=16M,PSRAM=opi" --port /dev/ttyACM0 .

# Monitor
arduino-cli monitor --port /dev/ttyACM0 --config baudrate=115200
```

## Expected Output

```
Hello T-Energy-S3!
Battery: 4200 mV
Battery: 4200 mV
...
```