the documented password for user “root” is “OpenRepeater”
This fails

I’ve substituted “admin” and “pi” for the username, with ungood results.

I’ve tried all three usernames with all-lowercase “openrepeater” with ungood results.

For those unfamiliar with RPi, there’s a way to recover lost passwords:
//
Insert the card in your SD card reader;
Edit the file “cmdline.txt” and append “init=/bin/sh”;
The Rpi will boot in single user mode;
Insert the card in the RPi again and boot up;
When prompt available, enter “su” to log as root (with no password);
//

However, this fails “/bin/sh: 0: can’t access tty; job control turned off” appears in the boot time dmesg.

suggestions on how to get to a point where I can reset the root password?

Perhaps another documented non-root username to try?

Thanks!
Joe