LEDs are present on most external MULTI-Modules and can be used to check the status of the module.
The basic functions of the LEDs are:
Green LED - indicates that the MULTI-Module is receiving power Red LED - indicates the status of the MULTI-Module
Red LED State
The module is not functioning.
On 0.05s; Off 1s
The selected protocol is not available on the module.
On 1s; Off 0.1s
Waiting for bind to be initiated.
On 0.1s; Off 0.1s
Binding in progress.
On 0.5s; Off 0.5s
Module is in Serial Mode but there is no signal from the radio.
Very Slow Blink
On 1s; Off 1s
Module is in PPM Mode but there is no signal from the radio.
Fast Double Blink
On 0.1s; Off 0.1s; On 0.1s; Off 0.5s
Serial debugging is waiting for a serial connection.
The module is operating (transmitting).
Three short; three long; three short
The firmware has detected that it is running on an MCU with less than 128KB of flash memory.
OpenTX will display the state of the MULTI-Module in the Module Status line of the RF module section on the Model Setup page.
In normal operation the Module Status will display the MULTI-Module firmware version and the Expected Channel Order.
If an auto-binding protocol is selected, and binding has not yet been initiated, the Module Status will display "Bind to load protocol".
When the module is binding, the Module Status will display the firmware version followed by "Binding".
In this situation, one of the following may be the cause:
The selected module is not installed - External is selected when Internal should be, or vice-versa
The wrong firmware is installed on the module - the wrong radio firmware, or telemetry inversion setting was used
The module is defective
A somewhat common fault is bad solder joints on the 5-pin module bay connector
There are two ways to get help:
RC Groups Forum - for general 'how-to' questions or advice from other users GitHub Issues - for reporting bugs or serious issues
To make it easier to provide help, please include the following information:
MULTI-Module type and the firmware version
Radio type, firmware, and firmware version
Using PPM or Serial
Description of what the LED on the MULTI-Module and the receiver/model are doing
Explanation of the behaviour and reproduction steps