If you enable LED_STRIP feature and the feature is turned off again after a reboot then check your config does not conflict with other features, as above.
Configure the LEDs using the `led` command.
The `led` command takes either zero or two arguments - an zero-based led number and a pair of coordinates, direction flags and mode flags.
If used with zero arguments it prints out the led configuration which can be copied for future reference.
Each led is configured using the following template: `x,y:ddd:mmm`
`x` and `y` are grid coordinates of a 0 based 16x16 grid, north west is 0,0, south east is 15,15
`ddd` specifies the directions, since an led can face in any direction it can have multiple directions. Directions are:
`N` - North
`E` - East
`S` - South
`W` - West
`U` - Up
`D` - Down
For instance, an LED that faces South-east at a 45 degree downwards angle could be configured as `SED`.
Note: It is perfectly possible to configure an LED to have all directions `NESWUD` but probably doesn't make sense.
`mmm` specifies the modes that should be applied an LED. Modes are:
Cut the strip into sections as per diagrams below. When the strips are cut ensure you reconnect each output to each input with cable where the break is made.
e.g. connect 5V out to 5V in, GND to GND and Data Out to Data In.
Orientation is when viewed with the front of the aircraft facing away from you and viewed from above.
### Example 12 LED config
The default configuration is as follows
```
led 0 2,2:ES:IA
led 1 2,1:E:WF
led 2 2,0:NE:IA
led 3 1,0:N:F
led 4 0,0:NW:IA
led 5 0,1:W:WF
led 6 0,2:SW:IA
led 7 1,2:S:WF
led 8 1,1:U:WF
led 9 1,1:U:WF
led 10 1,1:D:WF
led 11 1,1:D:WF
```
Which translates into the following positions:
```
5 3
\ /
\ 4 /
\ FRONT /
6 | 9-12 | 2
/ BACK \
/ 8 \
/ \
7 1
```
LEDs 1,3,5 and 7 should be placed underneath the quad, facing downwards.
LEDs 2, 4, 6 and 8 should be positioned so the face east/north/west/south, respectively.
LEDs 9-10 should be placed facing down, in the middle
LEDs 11-12 should be placed facing up, in the middle
This is the default so that if you don't want to place LEDs top and bottom in the middle just connect the first 8 leds.
### Example 16 LED config
```
15,15:SD:IA
8,8:E:FW
8,7:E:FW
15,0:ND:IA
7,7:N:FW
8,7:N:FW
0,0:ND:IA
7,7:W:FW
7,8:W:FW
0,15:SD:IA
7,8:S:FW
8,8:S:FW
7,7:D:FW
8,7:D:FW
7,7:U:FW
8,7:U:FW
```
Which translates into the following positions:
```
7 4
\ /
\ 6-5 /
8 \ FRONT / 3
| 13-16 |
9 / BACK \ 2
/ 11-12 \
/ \
10 1
```
LEDs 1,4,7 and 10 should be placed underneath the quad, facing downwards.
LEDs 2-3, 6-5, 8-9 and 11-12 should be positioned so the face east/north/west/south, respectively.
LEDs 13-14 should be placed facing down, in the middle
LEDs 15-16 should be placed facing up, in the middle
This configuration is specifically designed for the [Alien Spider AQ50D PRO 250mm frame](http://www.goodluckbuy.com/alien-spider-aq50d-pro-250mm-mini-quadcopter-carbon-fiber-micro-multicopter-frame.html).