To bring the devices back to life, I performed the rtl720 firmware upgrade procedure found here:
After that, the devices enumerated properly. The Blink.ino example compiled and loaded properly with the blue LED flashing as expected.
I tried a previous version of my software and that loaded and executed as expected. I modified my code with one line change (as before) and this is the error that was dumped:
Sketch uses 278048 bytes (54%) of program storage space. Maximum is 507904 bytes.
Device : ATSAMD51x19
Version : v1.1 [Arduino:XYZ] Mar 12 2020 17:43:33
Address : 0x0
Pages : 1024
Page Size : 512 bytes
Total Size : 512KB
Planes : 1
Lock Regions : 32
Locked : none
Security : false
BOD : false
BOR : true
Write 278960 bytes to flash (545 pages)
[==============================] 100% (545/545 pages)
Done in 3.522 seconds
Verify 278960 bytes of flash
[==============================] 100% (545/545 pages)
Verify successful
Done in 10.889 seconds
processing.app.SerialException: Error opening serial port ‘/dev/ttyACM0’.
at processing.app.Serial.(Serial.java:152)
at processing.app.Serial.(Serial.java:82)
at processing.app.SerialMonitor$2.(SerialMonitor.java:132)
at processing.app.SerialMonitor.open(SerialMonitor.java:132)
at processing.app.AbstractMonitor.resume(AbstractMonitor.java:132)
at processing.app.Editor.resumeOrCloseSerialMonitor(Editor.java:2120)
at processing.app.Editor.access$1300(Editor.java:117)
at processing.app.Editor$UploadHandler.run(Editor.java:2089)
at java.lang.Thread.run(Thread.java:748)
Caused by: jssc.SerialPortException: Port name - /dev/ttyACM0; Method name - openPort(); Exception type - Port not found.
at jssc.SerialPort.openPort(SerialPort.java:167)
at processing.app.Serial.(Serial.java:141)
… 8 more
Error opening serial port ‘/dev/ttyACM0’.
As before, the Wio Terminal will not enumerate. Green LED is on. The blue LED is off.
Should I post my code?
Thanks.