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-rw-r--r--docs/G-Codes.md9
1 files changed, 7 insertions, 2 deletions
diff --git a/docs/G-Codes.md b/docs/G-Codes.md
index 273870d5..38e7e389 100644
--- a/docs/G-Codes.md
+++ b/docs/G-Codes.md
@@ -272,7 +272,7 @@ The following command is available when a
[neopixel config section](Config_Reference.md#neopixel) or
[dotstar config section](Config_Reference.md#dotstar) is enabled:
- `SET_LED LED=<config_name> RED=<value> GREEN=<value> BLUE=<value>
- WHITE=<value> [INDEX=<index>] [TRANSMIT=0]`: This sets the LED
+ WHITE=<value> [INDEX=<index>] [TRANSMIT=0] [SYNC=1]`: This sets the LED
output. Each color `<value>` must be between 0.0 and 1.0. The WHITE
option is only valid on RGBW LEDs. If multiple LED chips are
daisy-chained then one may specify INDEX to alter the color of just
@@ -281,7 +281,12 @@ The following command is available when a
to the provided color. If TRANSMIT=0 is specified then the color
change will only be made on the next SET_LED command that does not
specify TRANSMIT=0; this may be useful in combination with the INDEX
- parameter to batch multiple updates in a daisy-chain.
+ parameter to batch multiple updates in a daisy-chain. By default, the
+ SET_LED command will sync it's changes with other ongoing gcode commands.
+ This can lead to undesirable behavior if LEDs are being set while the
+ printer is not printing as it will reset the idle timeout. If careful
+ timing is not needed, the optional SYNC=0 parameter can be specified to
+ apply the changes instantly and not reset the idle timeout.
## Servo Commands