olimex_ESP32-C6-EVB/esp32_arduino

ESP32-C6 Arduino Project

Arduino IDE project for ESP32-C6 Home Assistant integration.

Arduino IDE Setup

1. Install ESP32 Board Support

1. Open Arduino IDE
2. Go to File → Preferences
3. Add this URL to "Additional Boards Manager URLs":

   https://espressif.github.io/arduino-esp32/package_esp32_index.json
   

4. Go to Tools → Board → Boards Manager
5. Search for "esp32" by Espressif Systems
6. Install esp32 (version 3.0.0 or later for ESP32-C6 support)

2. Board Configuration

In Arduino IDE, select:

• Board: "ESP32C6 Dev Module"
• Upload Speed: 921600
• USB CDC On Boot: Enabled ⚠️ CRITICAL for serial output!
• Flash Size: 4MB
• Flash Mode: DIO
• Flash Frequency: 80MHz
• Partition Scheme: Default 4MB
• Port: /dev/ttyACM0 (ESP32-C6 typically uses ACM, not USB)

3. Open Project

1. Open esp32_arduino.ino in Arduino IDE
2. The IDE will create a folder with the same name automatically

4. Upload

1. Connect your ESP32-C6 board via USB
2. Check available ports: ls -la /dev/ttyACM* /dev/ttyUSB*
3. Select the correct Port in Tools menu (usually /dev/ttyACM0)
4. Click Upload button (→)
5. Wait for compilation and upload
6. Open Serial Monitor (Ctrl+Shift+M) and set to 115200 baud
7. Press the RESET button on your board to see output

Important: If you see no serial output:

• Verify USB CDC On Boot is set to Enabled
• Press the physical RESET button on the board
• Make sure Serial Monitor is set to 115200 baud

WiFi Configuration

WiFi credentials are already set in the code:

const char* ssid = "Buon-Gusto_Nou";
const char* password = "arleta13";

Features

Web Interface

After upload, open your browser to the IP shown in Serial Monitor:

• Control panel with buttons
• Real-time status
• API documentation

REST API Endpoints

Get Device Status

curl http://<ESP32_IP>/api/status

Response:

{
  "temperature": 25.3,
  "wifi_rssi": -45,
  "chip": "ESP32-C6",
  "free_heap": 280000,
  "uptime": 123,
  "ip": "192.168.1.100",
  "relay1": false,
  "led": false
}

Control Relay

# Turn ON
curl -X POST http://<ESP32_IP>/api/relay/relay_1/on

# Turn OFF
curl -X POST http://<ESP32_IP>/api/relay/relay_1/off

# Get Status
curl http://<ESP32_IP>/api/relay/relay_1/status

Control LED

# Turn ON
curl -X POST http://<ESP32_IP>/api/led/led/on

# Turn OFF
curl -X POST http://<ESP32_IP>/api/led/led/off

GPIO Pins

• LED_PIN: GPIO 8 (onboard LED)
• RELAY_1_PIN: GPIO 2 (relay control)

Modify these in the code if your board uses different pins.

Troubleshooting

Board Not Found in Arduino IDE

• Make sure you installed ESP32 board support (minimum version 3.0.0)
• Restart Arduino IDE after installation

Upload Fails

• Check USB cable connection
• Select correct port in Tools → Port
• Try pressing BOOT button during upload
• Reduce upload speed to 115200

WiFi Connection Fails

• Verify SSID and password
• Check if WiFi is 2.4GHz (ESP32-C6 doesn't support 5GHz)
• Check Serial Monitor for connection messages

Can't See Serial Output

• Set Serial Monitor baud rate to 115200
• Enable "USB CDC On Boot" in board settings
• Some boards need GPIO 0 held LOW during boot to enter programming mode

Serial Monitor Output

Expected output after successful upload:

=================================
ESP32-C6 Home Assistant Device
=================================
GPIO initialized
Connecting to WiFi: Buon-Gusto_Nou
..........
✓ WiFi connected!
IP address: 192.168.1.100
RSSI: -45 dBm
MAC: AA:BB:CC:DD:EE:FF

✓ HTTP server started on port 80

=================================
Ready! Try these endpoints:
  http://192.168.1.100/api/status
=================================

Next Steps

1. Upload the code to your ESP32-C6
2. Note the IP address from Serial Monitor
3. Test the web interface in your browser
4. Integrate with Home Assistant using the custom component at ../custom_components/olimex_esp32_c6/