Author Topic: Old Festool CT MIDI/MINI Bluetooth enablement.  (Read 1081 times)

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Offline Goldserve

  • Posts: 18
Old Festool CT MIDI/MINI Bluetooth enablement.
« on: December 31, 2020, 08:30 PM »
I was disappointed while pleasantly surprised to find the control board all potted up so I couldn't tap into the power and control signal to turn on the vacuum. I looked around and found a person trying to accomplish the same thing (https://www.eevblog.com/forum/projects/makita-(jdm)-vacuum-remote-start/) with a different brand of vacuum but the way it simulates the load is ingenious. A pure capacitive load won't draw any power so I don't have to sink 100W to trigger the vacuum but the electronics still sees current flow of ~0.9A so it will still turn on.

The final product here:

https : //youtu.be/6hmbjQUKAuA

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Offline Alex

  • Posts: 7035
Re: Old Festool CT MIDI/MINI Bluetooth enablement.
« Reply #1 on: January 01, 2021, 03:28 AM »


Works good, but isn't it a bore that you have to haul another box around?

Offline Goldserve

  • Posts: 18
Re: Old Festool CT MIDI/MINI Bluetooth enablement.
« Reply #2 on: January 01, 2021, 09:42 AM »
It’s only a garage shop. The bore is running back and forth to hit the button.


Offline krudawg

  • Posts: 86
Re: Old Festool CT MIDI/MINI Bluetooth enablement.
« Reply #4 on: January 13, 2021, 10:07 AM »
I was disappointed while pleasantly surprised to find the control board all potted up so I couldn't tap into the power and control signal to turn on the vacuum. I looked around and found a person trying to accomplish the same thing (https://www.eevblog.com/forum/projects/makita-(jdm)-vacuum-remote-start/) with a different brand of vacuum but the way it simulates the load is ingenious. A pure capacitive load won't draw any power so I don't have to sink 100W to trigger the vacuum but the electronics still sees current flow of ~0.9A so it will still turn on.

The final product here:

https : //youtu.be/6hmbjQUKAuA
I guess I don't understand why you want to convert the Mini/Midi to Bluetooth.  I installed a remote control activated electrical outlet made by IVAC.  Cost about $100.  No messing with the circuit board of the Midi.
You can find it at Woodcraft, Amazon etc. 
Ted
MFT/3, DF 500, Hammer K3 Winner, TS55,  Sjoberg Elite 1500 Workbench, Fuji MiniMite4 Platinum,
Former Marine, Vietnam Vet

Offline Goldserve

  • Posts: 18
Re: Old Festool CT MIDI/MINI Bluetooth enablement.
« Reply #5 on: January 13, 2021, 04:29 PM »
That’s fair, you could do that. It was more of an educational experiment and the ability to use that cool bt remote that is strapped to the hose. I definitely don’t recommend this method for everyone.

Offline woodferret

  • Posts: 59
Re: Old Festool CT MIDI/MINI Bluetooth enablement.
« Reply #6 on: January 13, 2021, 10:25 PM »
I like this.  How much of a pain was it to get the remote messaging working?

Offline Goldserve

  • Posts: 18
Re: Old Festool CT MIDI/MINI Bluetooth enablement.
« Reply #7 on: January 14, 2021, 01:16 PM »
I started by trying to analyze the messages from the BT board that would normally plug into the CT expansion port but it was taking too much time and hitting a dead end (looked like some NRZ encoding, etc). The pulses for an ON and OFF are exactly the same each time so I resorted to counting the number of rising edges within 1.2secs (1.1 seconds would miss some pulses for OFF).

Basically, the flow is like this:

void loop() {
  if (DetectPulse == true){
    delay(1200);
    if (PulseCount == 42){
      digitalWrite(14, HIGH);
      Serial.print("Turn on ");
    } else if (PulseCount == 64) {
      digitalWrite(14, LOW);
      Serial.print("Turn off ");
    } else {
      Serial.print("Unknown ");
    }
    PulseCount = 0;
    DetectPulse = false;
  }