Update readme file.

README.md

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-# relay_chn
+# relay_chn - Relay Channel Controller
 
-A custom ESP-IDF component for controlling a relay channel
+An ESP-IDF component for controlling relay channels, specifically designed for driving bipolar motors through relay pairs.
+
+## Features
+
+- Controls multiple relay channel pairs (up to 8 channels)
+- Built-in direction change inertia protection
+- Automatic command sequencing and timing
+- Event-driven architecture for reliable operation
+- Forward/Reverse direction control
+- Direction flipping capability
+- State monitoring and reporting
+
+## Description
+
+Each relay channel consists of 2 output relays controlled by 2 GPIO pins. The component provides APIs to control these relay pairs while ensuring safe operation, particularly for driving bipolar motors. It prevents short-circuits by automatically managing direction changes with configurable inertia timing.
+
+## Configuration
+
+Configure the component through menuconfig under "Relay Channel Driver Configuration":
+
+- `CONFIG_RELAY_CHN_OPPOSITE_INERTIA_MS`: Time to wait before changing direction (200-1500ms, default: 800ms)
+- `CONFIG_RELAY_CHN_COUNT`: Number of relay channels (1-8, default: 1)
+
+## Installation
+
+1. Copy the component to your project's components directory
+2. Add dependency to your project's `idf_component.yml`:
+
+```yaml
+dependencies:
+  relay_chn:
+    version: "^0.1.0"
+```
+
+## Usage
+
+### 1. Initialize relay channels
+
+```c
+// Define GPIO pins for relay channels
+const gpio_num_t gpio_map[] = {GPIO_NUM_4, GPIO_NUM_5};  // One channel example
+const uint8_t gpio_count = sizeof(gpio_map) / sizeof(gpio_map[0]);
+
+// Create and initialize relay channels
+esp_err_t ret = relay_chn_create(gpio_map, gpio_count);
+if (ret != ESP_OK) {
+    // Handle error
+}
+```
+
+### 2. Control relay channels
+
+```c
+// Run channel 0 forward
+relay_chn_run_forward(0);
+
+// Run channel 0 reverse
+relay_chn_run_reverse(0);
+
+// Stop channel 0
+relay_chn_stop(0);
+
+// Flip direction of channel 0
+relay_chn_flip_direction(0);
+```
+
+### 3. Monitor channel state
+
+```c
+// Get channel state
+relay_chn_state_t state = relay_chn_get_state(0);
+char *state_str = relay_chn_get_state_str(0);
+
+// Get channel direction
+relay_chn_direction_t direction = relay_chn_get_direction(0);
+```
+
+## License
+
+[MIT License](LICENSE) - Copyright (c) 2025 kozmotronik.