Not sure if this is the appropriate place to ask this question but I don't actually know where I should so I'll ask here anyways. So if someone could point me in the right direction before closing this post or something, that'd be appreciated.

I want a wireless sustain pedal for keyboards... Haven't been able to find them or any indication then exist on the internet lol.

So I was wondering if anybody could take me through a process of what it would take to make one.

I have a feeling this has more to do with circuitry than music, but yk.

sustain pedal

So I was basically wondering what the process would be like to covert one of these box pedals to a wireless device.

Obviously it needs a dongle... those technically exist already

tattoo pedal dongle

The picture is of a dongle "pedal plug" for wireless tattoo foot pedals, which operates somewhat like a cross between a guitar expression pedal and a keyboard sustain pedal.

Anyways, what would it take to use these two devices as one unit? Ideally I'd like project instructions, tho I understand it would probably be theoretical instructions bc I dont think this has rly been done.

And would my suggested approach for the receiving end even work since the dongle's design isn't an on/off circuit?

  • There is a MIDI controller dedicated to sustain - perhaps you can make it easy on yourself by looking for wireless MIDI systems Jul 15, 2023 at 0:01
  • 1
    Sounds like a nice project, but practically, why would one use a wireless pedal in preference to a wired one, especially since a dongle would have to be plugged in, in place of a jack. And with a more sophisticated full/half pedal system, found on a lot of kb'ds, that's another problem to solve?
    – Tim
    Jul 15, 2023 at 9:13
  • Well, I personally would only use it as a mobile accessory. I travel a good bit and like the idea of being able to use my midi setup without having to deal with cables as much, and could simply pull the pedal out of a backpack, flip a switch, and set it down. I don't use use pedals for anything more than basic sustain so that's not a concern for me. Jul 15, 2023 at 20:20

2 Answers 2


This can probably be done yourself, it depends a bit your experience with electronics/embedded programing. Here is an idea, there a multiple way of doing it.

There are basically three things this device should do:

  • sense the state of the pedal (device #1)
  • transmit it to the other dongle
  • send it to the keyboard (device #2)

These can all be done for instance with cheap hardware like Arduino, I'll consider the case where you have a boolean sustain pedal (on/off), which typically are connected via a mono jack but this should be easily adaptable to an analog one.

Device #1 (plugged into the pedal)

Here, a simple Arduino connected to a Jack (sleeve to ground, tip to a digital pin set as input pullup) would be completely enough for a start. One problem I see there is that this will need to be powered somehow. If you initial goal was to get rid of cables it might be worth moving to batteries…


That's a bit more challenging but there are a lot of options to transmit information between two such devices like bluetooth (probably the easiest but would be a bit concerned with latency), RF (probably better on that, might be subjected to interference)… Whatever protocol you choose, you'll need a transmitter (on device #1) and a receiver (on device #2).

Device #2 (plugged into the keyboard)

This should also be straightforward: a MCU, connected to a Jack (sleeve to ground, tip to an output pin) and switching between high-impedance state of this last pin and output to ground. Not completely sure how fast such a transition is but I doubt it is very slow. Of course, this transition would be triggered by information received on the receiver (whatever protocol you are using).

This is not a complete solution, merely a guide as nothing is implemented but sounds like a fun first project if you want to dive a bit into electronics!


One that is already shipping (launched at NAMM 2023) is Black BT's SusEx costing USD $149.99, that functions as both sustain and expression pedal.

One with less functionality and possibly cheaper is NuMotion's Wireless Sustain Pedal that seems to be still in development (as of this writing). They are known for their wireless curvy keyboard.

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