DeviationWiki

Devo 7E

The Devo 7E is the best value for money transmitter that you can buy that DeviationTx supports. It shares the same smaller body as the Devo 6 but instead has a 128×64 pixel LCD screen similar to the Devo 10.

It however only has 128k of flash memory, which is barely sufficient for DeviationTx. It is equipped with only two 2-way switches and a range limited RF module. There are proven modification though to overcome these limitations.

Introduction to the Devo 7E by SeBy DocKy
Walkera Devo 7E transmitter with Deviation review by kenVersus
Control All Models With One Transmitter - Deviationtx by AndyRC

Features
LCD	128×64 B/W with backlight
Touch Screen	No
Gimbal Bearings	Yes
Switches	HOLD (2-way)
Switches	FMOD (2-way)
Potentiometers	No
DSC (Trainer) Port	Yes
Charging Port	Yes (For NiMh only)
SD Card Slot	No
USB Upgradable	Yes
Power	4 x AA

Installing DeviationTx

Start by reading the Devo 7E manual.

If that's not enough, the tutorials below should get you going.

HowTo: Install DEVIATION on a Walkera Devo 7e by RCFanBlog
DeviationTX Installation by SeBy DocKy
Install Deviation Hack on DEVO Radio by benmlee.com

Modifications

Due to its' popularity and price, the Devo 7E probably has the most documented modifications available within the Walkera Devo line of transmitters. Here you'll find the tutorials and videos to get you started.

Disassembly

All modifications have to begin with disassembling the transmitter. Here's how to do it.

Opening Devo 7E by jygravityRC
Devo 7E Disassembling by SeBy DocKy

Extra RF Modules

You can install up to 3 extra RF modules in the Devo 7E, for a total of 4 modules including the stock RF module. Two quite easily and the third via soldering directly to a processor pin.

Alternatively you can build the MultiModule instead. With the MultiModule, you will not need to solder to the processor pin and still use all 4 modules.

The process is very well documented in the wiki page “RF Module Installation”.

Additional information can be found here:

Devo 7E DeviationTx Flysky/Hubsan Mod by hacksmods.com
Devo7E nRF24L01 mod by SeBy DocKy
Devo7E CC2500 mod by SeBy DocKy
7e/Ultimate7e, adding the devo version 4in1 by HappyHarry in our forum

Full Range Mod

This will modify the stock RF module for full range. It requires removal of the shield and bypassing of a diode within module. Various methods for doing the bypass exists, so read through the tutorials and decide which you want to try.

Walkera Devo 7e Transmitter Increase Range Mod by hacksmods.com
Removing shield and diode 7E for better reach by Mullson in our forum
Devo7E tutorials: part4 - CYRF6936 diode mod by SeBy DocKy
Devo 7e range mod by jayodas

WK-DEVO-S-MOD RF Module

If you'd prefer not to fool around with soldering inside the stock RF module, or you damage the stock RF module, you can replace it with Walkera's full range module used in the Devo 6/8/10 transmitters. This requires removal of the stock RF module.

WK-DEVO-S-MOD Module for Devo 7e by hacksmods.com

Add Two 2-way Switches

This modification will add two 2-way switches labeled “SW A” and “SW B”.

Add Two switches to the Devo 7E by cmpang in our forum

Add One/Two 3-way Switches

This modification will add either one or two 2-way switches labeled “SW A” or “SW A” and “SW B” respectively.

Adding Two 3-position Switches by straferr on rcgroups.com
3x2 Switches Mod by SeBy DocKy

Add Upto 4 3-way or 8 2-way (or any combination thereof) Switches

*3x4, 2x8 Switches by slipstream

Arduino to PPMin for Extra Inputs

The trainer port can be hijacked for an arduino to provide PPM signals from nearly any combination of switches and potentiometers. This modification effectively takes over the trainer port by mimicking a 2nd connected transmitter and injects PPM signal to the channels. Note that once you do this mod, you will not be able to connect another transmitter to the trainer port.