I purchased a used Midi Maestro and wanted to update the firmware. I downloaded the Midi Maestro App on my Iphone and paired it to the Midi Maestro to update the firmware from 1.1.6 to 1.1.9. The phone seemed to be loading something to the Midi Maestro over several minutes. I came back to see if it was done and all the screens just said EPPROM INVALID. I turned it on and off but still the same thing. Seems like there is no Firmware left ??? Any suggestions ?
Use this link to do a forum search and see if it helps you resolve the issue Search results for 'EEPROM invalid' - Singular Sound Forum
If it doesn’t, contact support@singularsound.com and let us know how it turns out.
I got the issue resolved. Found there was an extra step “Updating Default Modes” in the MM App that was not apparent in the initial instructions I saw.