LED Outputs

Status LED¶

The status LED (STATUS_LED) indicates the status of TimoTwo module. The LED indicator pin is an output pin capable of sourcing 5mA at the V_DD voltage. An appropriate current limiting resistor must be connected in series with the LED. This LED is also used when using the link switch based method of switching flex modes; please refer to flex mode page for details.

Receiver¶

Constant off (0V): Not linked to any transmitter

Flashing: off (0V) 100 ms / on (V_DD) 100 ms: linked to a transmitter, but no active radio link

Flashing: off (0V) 900 ms / on (V_DD) 100 ms: Active radio link, no DMX present

Constant on (V_DD): Active radio link, DMX data present

Transmitter¶

Flashing: off (0V) 900 ms / on (V_DD) 100 ms: Active radio link, no DMX present

Constant on (V_DD): Active radio link, DMX data present

Flashing: off (0V) 100 ms / on (V_DD) 100 ms: linking receivers

Flashing: off (0V) 200 ms / on (V_DD) 200 ms: unlinking receivers

Linked¶

Receiver¶

The Linked LED (LINKED) indicates whether the TimoTwo is linked to a transmitter or if it’s available to be linked. High level (V_DD) on this pin indicates a linked state; low level (0V) indicates that the TimoTwo module is not linked.

Transmitter¶

High level (V_DD) on this pin indicates an ongoing linking activity; low level (0V) indicates that the TimoTwo module is currently not performing a linking activity.

RF Link¶

Receiver¶

A high level (V_DD) on the RF Link LED output (RF_LINK) indicates that the receiver is within range from the transmitter it is linked to and that an active radio link from the transmitter is present.

Transmitter¶

A high level (V_DD) on the RF Link LED output (RF_LINK) indicates that there is an active radio link.

DMX LED¶

The DMX LED (DMX_LED) indicates if a valid DMX stream is received. A high level (V_DD) indicates that DMX is present, a low level (0V) indicates that no valid DMX is present.

RDM LED¶

A high level (V_DD) on the RDM LED output (RDM_LED) indicates that the TimoTwo is performing RDM activity.

Radio level¶

TimoTwo has 5 output signals for controlling radio level LEDs in the form of a bar graph (RDI_LVL0 - RDI_LVL4). Operation of these, and suggestion of LED colors, can be found in the table below. These are only used for receivers.

Signal name	Suggested LED color	On when signal quality
`RDI_LVL0`	Red	below 10%
`RDI_LVL1`	Amber / Yellow	above 20%
`RDI_LVL2`	Green	above 40%
`RDI_LVL3`	Green	above 60%
`RDI_LVL4`	Green	above 80%

RGB LED¶

It is possible to connect an external RGB LED driver to the module's I²C interface. The RGB LED will indicate the universe color at the same time as it acts as the STATUS_LED, RF_LINK or the LINKED LEDs, depending on what LED output of the driver IC that is used.

Output 1 (LED0-LED2): Mimics STATUS LED
Output 2 (LED3-LED5): Mimics RF_LINK LED
Output 3 (LED6-LED8): Mimics LINKED LED

For more information about universe color, see the universe metadata section.

Example schematic