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# API Reference
## Header files
- [include/led_strip.h](#file-includeled_striph)
- [include/led_strip_rmt.h](#file-includeled_strip_rmth)
- [include/led_strip_spi.h](#file-includeled_strip_spih)
- [include/led_strip_types.h](#file-includeled_strip_typesh)
- [interface/led_strip_interface.h](#file-interfaceled_strip_interfaceh)
## File include/led_strip.h
## Functions
| Type | Name |
| ---: | :--- |
| esp\_err\_t | [**led\_strip\_clear**](#function-led_strip_clear) ([**led\_strip\_handle\_t**](#struct-led_strip_t) strip) <br>_Clear LED strip (turn off all LEDs)_ |
| esp\_err\_t | [**led\_strip\_del**](#function-led_strip_del) ([**led\_strip\_handle\_t**](#struct-led_strip_t) strip) <br>_Free LED strip resources._ |
| esp\_err\_t | [**led\_strip\_refresh**](#function-led_strip_refresh) ([**led\_strip\_handle\_t**](#struct-led_strip_t) strip) <br>_Refresh memory colors to LEDs._ |
| esp\_err\_t | [**led\_strip\_set\_pixel**](#function-led_strip_set_pixel) ([**led\_strip\_handle\_t**](#struct-led_strip_t) strip, uint32\_t index, uint32\_t red, uint32\_t green, uint32\_t blue) <br>_Set RGB for a specific pixel._ |
| esp\_err\_t | [**led\_strip\_set\_pixel\_hsv**](#function-led_strip_set_pixel_hsv) ([**led\_strip\_handle\_t**](#struct-led_strip_t) strip, uint32\_t index, uint16\_t hue, uint8\_t saturation, uint8\_t value) <br>_Set HSV for a specific pixel._ |
| esp\_err\_t | [**led\_strip\_set\_pixel\_rgbw**](#function-led_strip_set_pixel_rgbw) ([**led\_strip\_handle\_t**](#struct-led_strip_t) strip, uint32\_t index, uint32\_t red, uint32\_t green, uint32\_t blue, uint32\_t white) <br>_Set RGBW for a specific pixel._ |
## Functions Documentation
### function `led_strip_clear`
_Clear LED strip (turn off all LEDs)_
```c
esp_err_t led_strip_clear (
led_strip_handle_t strip
)
```
**Parameters:**
- `strip` LED strip
**Returns:**
- ESP\_OK: Clear LEDs successfully
- ESP\_FAIL: Clear LEDs failed because some other error occurred
### function `led_strip_del`
_Free LED strip resources._
```c
esp_err_t led_strip_del (
led_strip_handle_t strip
)
```
**Parameters:**
- `strip` LED strip
**Returns:**
- ESP\_OK: Free resources successfully
- ESP\_FAIL: Free resources failed because error occurred
### function `led_strip_refresh`
_Refresh memory colors to LEDs._
```c
esp_err_t led_strip_refresh (
led_strip_handle_t strip
)
```
**Parameters:**
- `strip` LED strip
**Returns:**
- ESP\_OK: Refresh successfully
- ESP\_FAIL: Refresh failed because some other error occurred
**Note:**
: After updating the LED colors in the memory, a following invocation of this API is needed to flush colors to strip.
### function `led_strip_set_pixel`
_Set RGB for a specific pixel._
```c
esp_err_t led_strip_set_pixel (
led_strip_handle_t strip,
uint32_t index,
uint32_t red,
uint32_t green,
uint32_t blue
)
```
**Parameters:**
- `strip` LED strip
- `index` index of pixel to set
- `red` red part of color
- `green` green part of color
- `blue` blue part of color
**Returns:**
- ESP\_OK: Set RGB for a specific pixel successfully
- ESP\_ERR\_INVALID\_ARG: Set RGB for a specific pixel failed because of invalid parameters
- ESP\_FAIL: Set RGB for a specific pixel failed because other error occurred
### function `led_strip_set_pixel_hsv`
_Set HSV for a specific pixel._
```c
esp_err_t led_strip_set_pixel_hsv (
led_strip_handle_t strip,
uint32_t index,
uint16_t hue,
uint8_t saturation,
uint8_t value
)
```
**Parameters:**
- `strip` LED strip
- `index` index of pixel to set
- `hue` hue part of color (0 - 360)
- `saturation` saturation part of color (0 - 255)
- `value` value part of color (0 - 255)
**Returns:**
- ESP\_OK: Set HSV color for a specific pixel successfully
- ESP\_ERR\_INVALID\_ARG: Set HSV color for a specific pixel failed because of an invalid argument
- ESP\_FAIL: Set HSV color for a specific pixel failed because other error occurred
### function `led_strip_set_pixel_rgbw`
_Set RGBW for a specific pixel._
```c
esp_err_t led_strip_set_pixel_rgbw (
led_strip_handle_t strip,
uint32_t index,
uint32_t red,
uint32_t green,
uint32_t blue,
uint32_t white
)
```
**Note:**
Only call this function if your led strip does have the white component (e.g. SK6812-RGBW)
**Note:**
Also see `led_strip_set_pixel` if you only want to specify the RGB part of the color and bypass the white component
**Parameters:**
- `strip` LED strip
- `index` index of pixel to set
- `red` red part of color
- `green` green part of color
- `blue` blue part of color
- `white` separate white component
**Returns:**
- ESP\_OK: Set RGBW color for a specific pixel successfully
- ESP\_ERR\_INVALID\_ARG: Set RGBW color for a specific pixel failed because of an invalid argument
- ESP\_FAIL: Set RGBW color for a specific pixel failed because other error occurred
## File include/led_strip_rmt.h
## Structures and Types
| Type | Name |
| ---: | :--- |
| struct | [**led\_strip\_rmt\_config\_t**](#struct-led_strip_rmt_config_t) <br>_LED Strip RMT specific configuration._ |
## Functions
| Type | Name |
| ---: | :--- |
| esp\_err\_t | [**led\_strip\_new\_rmt\_device**](#function-led_strip_new_rmt_device) (const [**led\_strip\_config\_t**](#struct-led_strip_config_t) \*led\_config, const [**led\_strip\_rmt\_config\_t**](#struct-led_strip_rmt_config_t) \*rmt\_config, [**led\_strip\_handle\_t**](#struct-led_strip_t) \*ret\_strip) <br>_Create LED strip based on RMT TX channel._ |
## Structures and Types Documentation
### struct `led_strip_rmt_config_t`
_LED Strip RMT specific configuration._
Variables:
- rmt\_clock\_source\_t clk_src <br>RMT clock source
- struct [**led\_strip\_rmt\_config\_t**](#struct-led_strip_rmt_config_t) flags <br>Extra driver flags
- size\_t mem_block_symbols <br>How many RMT symbols can one RMT channel hold at one time. Set to 0 will fallback to use the default size.
- uint32\_t resolution_hz <br>RMT tick resolution, if set to zero, a default resolution (10MHz) will be applied
- uint32\_t with_dma <br>Use DMA to transmit data
## Functions Documentation
### function `led_strip_new_rmt_device`
_Create LED strip based on RMT TX channel._
```c
esp_err_t led_strip_new_rmt_device (
const led_strip_config_t *led_config,
const led_strip_rmt_config_t *rmt_config,
led_strip_handle_t *ret_strip
)
```
**Parameters:**
- `led_config` LED strip configuration
- `rmt_config` RMT specific configuration
- `ret_strip` Returned LED strip handle
**Returns:**
- ESP\_OK: create LED strip handle successfully
- ESP\_ERR\_INVALID\_ARG: create LED strip handle failed because of invalid argument
- ESP\_ERR\_NO\_MEM: create LED strip handle failed because of out of memory
- ESP\_FAIL: create LED strip handle failed because some other error
## File include/led_strip_spi.h
## Structures and Types
| Type | Name |
| ---: | :--- |
| struct | [**led\_strip\_spi\_config\_t**](#struct-led_strip_spi_config_t) <br>_LED Strip SPI specific configuration._ |
## Functions
| Type | Name |
| ---: | :--- |
| esp\_err\_t | [**led\_strip\_new\_spi\_device**](#function-led_strip_new_spi_device) (const [**led\_strip\_config\_t**](#struct-led_strip_config_t) \*led\_config, const [**led\_strip\_spi\_config\_t**](#struct-led_strip_spi_config_t) \*spi\_config, [**led\_strip\_handle\_t**](#struct-led_strip_t) \*ret\_strip) <br>_Create LED strip based on SPI MOSI channel._ |
## Structures and Types Documentation
### struct `led_strip_spi_config_t`
_LED Strip SPI specific configuration._
Variables:
- spi\_clock\_source\_t clk_src <br>SPI clock source
- struct [**led\_strip\_spi\_config\_t**](#struct-led_strip_spi_config_t) flags <br>Extra driver flags
- spi\_host\_device\_t spi_bus <br>SPI bus ID. Which buses are available depends on the specific chip
- uint32\_t with_dma <br>Use DMA to transmit data
## Functions Documentation
### function `led_strip_new_spi_device`
_Create LED strip based on SPI MOSI channel._
```c
esp_err_t led_strip_new_spi_device (
const led_strip_config_t *led_config,
const led_strip_spi_config_t *spi_config,
led_strip_handle_t *ret_strip
)
```
**Note:**
Although only the MOSI line is used for generating the signal, the whole SPI bus can't be used for other purposes.
**Parameters:**
- `led_config` LED strip configuration
- `spi_config` SPI specific configuration
- `ret_strip` Returned LED strip handle
**Returns:**
- ESP\_OK: create LED strip handle successfully
- ESP\_ERR\_INVALID\_ARG: create LED strip handle failed because of invalid argument
- ESP\_ERR\_NOT\_SUPPORTED: create LED strip handle failed because of unsupported configuration
- ESP\_ERR\_NO\_MEM: create LED strip handle failed because of out of memory
- ESP\_FAIL: create LED strip handle failed because some other error
## File include/led_strip_types.h
## Structures and Types
| Type | Name |
| ---: | :--- |
| enum | [**led\_model\_t**](#enum-led_model_t) <br>_LED strip model._ |
| enum | [**led\_pixel\_format\_t**](#enum-led_pixel_format_t) <br>_LED strip pixel format._ |
| struct | [**led\_strip\_config\_t**](#struct-led_strip_config_t) <br>_LED Strip Configuration._ |
| typedef struct [**led\_strip\_t**](#struct-led_strip_t) \* | [**led\_strip\_handle\_t**](#typedef-led_strip_handle_t) <br>_LED strip handle._ |
## Structures and Types Documentation
### enum `led_model_t`
_LED strip model._
```c
enum led_model_t {
LED_MODEL_WS2812,
LED_MODEL_SK6812,
LED_MODEL_INVALID
};
```
**Note:**
Different led model may have different timing parameters, so we need to distinguish them.
### enum `led_pixel_format_t`
_LED strip pixel format._
```c
enum led_pixel_format_t {
LED_PIXEL_FORMAT_GRB,
LED_PIXEL_FORMAT_GRBW,
LED_PIXEL_FORMAT_INVALID
};
```
### struct `led_strip_config_t`
_LED Strip Configuration._
Variables:
- struct [**led\_strip\_config\_t**](#struct-led_strip_config_t) flags <br>Extra driver flags
- uint32\_t invert_out <br>Invert output signal
- led\_model\_t led_model <br>LED model
- led\_pixel\_format\_t led_pixel_format <br>LED pixel format
- uint32\_t max_leds <br>Maximum LEDs in a single strip
- int strip_gpio_num <br>GPIO number that used by LED strip
### typedef `led_strip_handle_t`
_LED strip handle._
```c
typedef struct led_strip_t* led_strip_handle_t;
```
## File interface/led_strip_interface.h
## Structures and Types
| Type | Name |
| ---: | :--- |
| struct | [**led\_strip\_t**](#struct-led_strip_t) <br>_LED strip interface definition._ |
| typedef struct [**led\_strip\_t**](#struct-led_strip_t) | [**led\_strip\_t**](#typedef-led_strip_t) <br> |
## Structures and Types Documentation
### struct `led_strip_t`
_LED strip interface definition._
Variables:
- esp\_err\_t(\* clear <br>_Clear LED strip (turn off all LEDs)_<br>**Parameters:**
- `strip` LED strip
- `timeout_ms` timeout value for clearing task
**Returns:**
- ESP\_OK: Clear LEDs successfully
- ESP\_FAIL: Clear LEDs failed because some other error occurred
- esp\_err\_t(\* del <br>_Free LED strip resources._<br>**Parameters:**
- `strip` LED strip
**Returns:**
- ESP\_OK: Free resources successfully
- ESP\_FAIL: Free resources failed because error occurred
- esp\_err\_t(\* refresh <br>_Refresh memory colors to LEDs._<br>**Parameters:**
- `strip` LED strip
- `timeout_ms` timeout value for refreshing task
**Returns:**
- ESP\_OK: Refresh successfully
- ESP\_FAIL: Refresh failed because some other error occurred
**Note:**
: After updating the LED colors in the memory, a following invocation of this API is needed to flush colors to strip.
- esp\_err\_t(\* set_pixel <br>_Set RGB for a specific pixel._<br>**Parameters:**
- `strip` LED strip
- `index` index of pixel to set
- `red` red part of color
- `green` green part of color
- `blue` blue part of color
**Returns:**
- ESP\_OK: Set RGB for a specific pixel successfully
- ESP\_ERR\_INVALID\_ARG: Set RGB for a specific pixel failed because of invalid parameters
- ESP\_FAIL: Set RGB for a specific pixel failed because other error occurred
- esp\_err\_t(\* set_pixel_rgbw <br>_Set RGBW for a specific pixel. Similar to_ `set_pixel`_but also set the white component._<br>**Parameters:**
- `strip` LED strip
- `index` index of pixel to set
- `red` red part of color
- `green` green part of color
- `blue` blue part of color
- `white` separate white component
**Returns:**
- ESP\_OK: Set RGBW color for a specific pixel successfully
- ESP\_ERR\_INVALID\_ARG: Set RGBW color for a specific pixel failed because of an invalid argument
- ESP\_FAIL: Set RGBW color for a specific pixel failed because other error occurred
### typedef `led_strip_t`
```c
typedef struct led_strip_t led_strip_t;
```
Type of LED strip
|
