Control the Behringer X32 via WiFi using ESP32, e.g. as a stompbox

• one-way (just send) - in case we don't want to hog the bandwidth
• two-way (receive confirmation and update LED)
• monitor battery voltage, and flash GPIO LED if low
• long press button (for secondary function, e.g. variation of button)
• very long press button (to prevent accidental presses, e.g. major snippets)
• more than one widget can monitor the same GPIO button (e.g. short press and long press; short press event will be generated even if long press)
• indicate when battery nearly full

• excess power wasted trying to reconnect to WiFi if unable to connect (extra 70mA approx)
• battery voltage divider may drain battery
• WiFi password is hardcoded

• short press button event will be generated even if long press
• X32 echoes /load snippet but does not say which snippet
• battery power switch disconnects battery (i.e. cannot charge if 'off')
• battery-full indication turns off when my ESP32-Lolin stops charging the LiPo

• subscribe vs xremote? subscribe gives stream of data even if no changes

• 2023-03-04 initial draft
• 2023-03-13 about as much can be done now without actual hardware
• 2023-04-06 first site release

• test implementation of MIDI output; does MIDI SysEx method accept float?
• investigate - does actual X32 echo mute, fader, mutegroup?
• indicate battery level at start-up

• find other way to save energy usage if cannot connect to WiFi (WiFi.disconnect doesn't seem to stop the process)
• have a MIDI-only payload

• https://community.musictribe.com/discussion/solutions/10/0/257791/diy-wifi%252Fmidi-remote-control-box-for-x-air%253A-working!
• Patrick-Gilles Maillot
  • X32 emulator
  • Unofficial X32 OSC protocol document
  • and other utilities