However, recent the availability of the 4-in-1 RF modules from Banggood for less than $35 makes it easy to “have it all”. However, due to the growing interest in “one module to rule them all” you now have options to purchase a ready-made board (with old firmware that you will need to upgrade).įor more information on these options see the hardware page Choice 2: Which RF modules to include in the MULTI-Module The last option is where it all started and how the pioneers in this project made their boards.
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Scratchbuild a MULTI-Module - Build the module from scratch using perfboard base, an Arduino Pro Mini and discrete components.OrangeRx MULTI-Module You can turn the OrangeRx DSM2/X Tx module (available from HobbyKing) into a MULTI-Module to increase the number of supported protocols, add telemetry as an option and bind more successfully with problematic bind-and-fly models.DIY MULTI-Module - Purchase one of the PCB options from OSHPark and then solder on your own components and RF modules (the two options differ in the MCU used - either an ATmega328P or a STM32F1).Ready-made MULTI-Module - Available from Banggood which includes a 4-in-1 RF module and an antenna switcher.Here they are, in order of increasing difficulty: These are outlined in detail on the hardware page. There are currently four generic paths to get your hands on an MULTI-Module. The most important are: Choice 1: Which MULTI-Module hardware option In constructing a functioning MULTI-Module there are important choices to be made and tradeoffs to be aware of. Your ability to use the telemetry information depends on your radio hardware and firmware. The MULTI-Module is fully telemetry capable for all protocols that support telemetry. One of the most attractive features of the MULTI-module is the ability to send telemetry signals back to the transmitter. The physical 2.4GHz antenna (or in some cases multiple antennas) for the modules In the case of some protocols (for example DSMX and FrSky) it receives and decodes the telemetry information and makes this available to the radio.It implements the unique communication protocols for each receiver/model and manages the all-important binding process with a receiver/model.It interfaces with signals from the host Tx and decodes these for transmission to the model, it manages the activation of the correct hardware RF module for each protocol.At a high level, this firmware performs a few different functions: MULTI-firmware loaded on to the microprocessor.The four most common 2.4GHz RF chips on the market are supported TI CC2500, Nordic NRF24L01, Cypress CYRF6936, and the Amiccom A7105 To communicate with the receiver the RF module in the Tx must match with the RF module type in the receiver. One or more (but at least one) RF modules that provide the capability to communicate with RC receivers.A microcontroller (currently ATMega328P or STM32) that interfaces with the Tx, controls the module functions and forwards the RC commands to the RF hardware.Advanced Topics (not for the fainthearted!)Ī functioning MULTI-Module consists of (see image below):Ī Multiprotocol Transmitter Module (MULTI-Module) that connects to a host transmitter.Transmitters and serial/telemetry options.
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Download latest releases of the firmware and instructions to upload.Download the latest test build here.Ĭurrent Multiprotocol boards check status: Quicklinks
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If you like this project and want to support further development please consider making a donation.Ĭurrent Multiprotocol code check status. The main forum for protocol requests and questions is on. The Multiprotocol Tx Module (or MULTI-Module) is a 2.4GHz transmitter module which enables almost any transmitter to control many different receivers and models, including many popular helicopters, planes, quadcopters, and miniquads.