Initial test setup

1 files changed, 40 insertions, 0 deletions

diff --git a/README.md b/README.md
new file mode 100644
index 0000000..5abe2c1
--- /dev/null
+++ b/README.md
@@ -0,0 +1,40 @@
+# 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
+...
+```