On Official Slime HW it is not possible to flash them just over USB when they are in a boot loop.
They are based from ESP8266.
Left ESP32* out of loop as they either have a HW solution to put them into Flash Mode or use USB JTag on the chip.
Target is, that there is a fail safe at begin of the program so it goes into flash mode if it reboots more than 3 times after a crash. For ESP32 it is directly after a crash. For HW with softpower solution (gorbits as example) the code in init has maybe to be changed, so a reboot with a button press is still possible.

Current Status is:

• A safe mode shell
• Boot Prompt with Infos from Flash
• Small Serial command set:
  • FRST - Factory Reset, cleans the config file and WiFi credentials (useful by crashes to wrong configs)
  • SET FLASHMODE - Sets the tracker into flashmode does work on ESP8266 and ESP32-C3 )
  • REBOOT - Reboots the tracker
• Still not able to recover from updates that have been interrupted by power off at the wrong time

Tasks:

• Needs to be checked if this constructor runs rly before all other constructors.
• Testing with official Slimes
• Testing that no breaks for ESP32 variants.
• Lint