Table of Contents

Devo 7E

walkera-devo-7e.jpg

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.

Features
LCD 128×64 B/W with backlight
Touch Screen No
Gimbal Bearings Yes
Switches HOLD (2-way)
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.

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.

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:

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.

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.

Add Two 2-way Switches

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

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.

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.

Swivel Antenna Mod

Install an external swappable swivel antenna to improve reception and reliability.

LiPo Battery Mod

Swap out to a higher capacity LiPo battery. Search around as there are now few manufacturers that make a LiPo specifically for the Devo 7E.

Power Regulator Upgrade

Adding higher power handling regulators for the extra load due to the RF module upgrades.

Add Power-on LEDs

Have an LED light up when the power is turned on.

USB Charge Mod

Enable power in from the USB port.

3D Printable Parts

These are some parts that can be 3D printed to upgrade the Devo 7E.

Other Devo 7E Resources

Hardware Information