{"id":3865,"date":"2021-12-14T14:00:52","date_gmt":"2021-12-14T22:00:52","guid":{"rendered":"https:\/\/www.cloudacm.com\/?p=3865"},"modified":"2021-11-12T06:40:20","modified_gmt":"2021-11-12T14:40:20","slug":"flysky-ibus-interface","status":"publish","type":"post","link":"https:\/\/www.cloudacm.com\/?p=3865","title":{"rendered":"FlySky iBus Interface"},"content":{"rendered":"

The FlySky TX has some interesting features that allow it to display sensor readings from a RX. Having a ground based data logger made looking into this worthwhile. This post will cover the process used by the FlySky for sensor readings as well as interfacing micro controllers as a sensor source. There is a community of developers that have done a bulk of the work presented here and an effort will be made to give credit to them.<\/p>\n

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The FlySky RX is the receiving radio device that has 2 way radio communication with the TX. It also has its own set of protocols to interface with peripherals that connect to it, such as servos. Traditionally, servos are controlled with PWM signals from the RX. The FlySky RX also has a proprietary protocol called iBus which is a serial protocol that physically connects to peripherals in a daisy chain.<\/p>\n

Contributors to Betaflight have provided details about iBus which is available here, https:\/\/github.com\/betaflight\/betaflight\/wiki\/Single-wire-FlySky-(IBus)-telemetry<\/a>. For those of you new to Betaflight, that is a flight controller software platform that was forked from Cleanflight, http:\/\/cleanflight.com\/<\/a> and https:\/\/github.com\/cleanflight\/cleanflight<\/a>. The main take away is the identification process iBus uses to determine the sensor type. FlySky iBus supports numerous sensor types which identify themselves with 0x00 to 0xFF hex values.<\/p>\n

This project contains more details about iBus support with microcontrollers, https:\/\/github.com\/bmellink\/IBusBM<\/a>. The IBusBM.h in the source has a narrow selection of sensor types, but makes reference to another source:
\nhttps:\/\/github.com\/cleanflight\/cleanflight\/blob\/7cd417959b3cb605aa574fc8c0f16759943527ef\/src\/main\/telemetry\/ibus_shared.h<\/a>. This list is included in some of my code examples as a reference. As pointed out, the sensor list is extensive and has the potential to provide operators with much detail. This page provides a glimpse at that, https:\/\/github.com\/qba667\/FlySkyI6\/wiki\/Telemetry<\/a>.<\/p>\n

FlySky provides a range of prebuilt iBus sensors, some of which are demonstrated here.<\/p>\n