<![CDATA[MIDI Synth Unit with DIN & TRS connectors (SAM2695)]]>This unit works great using UiFlow and the Grove UART connection. I have been unable to get the synth to respond to MIDI input from an Arturia MINILAB 3 via either the MIDI IN or TRS IN connector. The MIDI signals coming from the MINILAB and going in to either of these two connectors are correct and verified with a logic analyzer.

I am new to MIDI - am I making a beginners mistake or is it not possible to send a MIDI note in to this device from a keyboard?

]]>https://community.m5stack.com/topic/7458/midi-synth-unit-with-din-trs-connectors-sam2695RSS for NodeWed, 29 Apr 2026 11:31:22 GMTMon, 31 Mar 2025 21:18:53 GMT60<![CDATA[Reply to MIDI Synth Unit with DIN & TRS connectors (SAM2695) on Tue, 01 Apr 2025 20:03:48 GMT]]>@holofloh

Connecting TXD to RXD & supplying 5V to the Grove connector works great! I never thought about studying the schematic right on the device. Thanks for your assistance!

]]>https://community.m5stack.com/post/28755https://community.m5stack.com/post/28755Tue, 01 Apr 2025 20:03:48 GMT<![CDATA[Reply to MIDI Synth Unit with DIN & TRS connectors (SAM2695) on Tue, 01 Apr 2025 16:05:35 GMT]]>@holofloh

Very helpful. Thank you so much!

]]>https://community.m5stack.com/post/28752https://community.m5stack.com/post/28752Tue, 01 Apr 2025 16:05:35 GMT<![CDATA[Reply to MIDI Synth Unit with DIN & TRS connectors (SAM2695) on Tue, 01 Apr 2025 05:52:11 GMT]]>When looking to the schematic on the back side of the unit then you will see the signal paths:

  1. from MIDI IN to Groove TXD and the Switch
  2. from Grove RXD to SAM2695 and the Switch
  3. from the Switch to MIDI OUT

Connecting the MIDI IN direct to the SAM2695 is not prepared.

You have to go thru Groove port to do that. It may work if you just bridge the TXD and RXT on the port with a jumper wire (don't forget the 5V supply). Otherwise you have to go thru your processor and put everything what is coming in direct to the out.

]]>https://community.m5stack.com/post/28733https://community.m5stack.com/post/28733Tue, 01 Apr 2025 05:52:11 GMT