So, the stuck v2 server occurred again.  Went off to so some other things, came back to find it wasn't connected.  Stopped and started, but the start never returned.  I toggled the wifi hotspot that it was connected through (confirmed on the hotspot side), but it never reconnected.  Disconnecting and reconnecting the simple_monitor; still no prompt, no response to the keyboard.  Presume it's stuck in a loop somewhere, with the lights turned out.  No idea how to get its attention at this point, to find out what it's doing...

Welcome to the Open Vehicle Monitoring System (OVMS) - Async Console
I (4161) wifi: n:1 1, o:1 0, ap:1 1, sta:1 0, prof:1
I (4821) wifi: state: init -> auth (b0)
I (4831) wifi: state: auth -> auth (4a0)
I (5821) wifi: state: auth -> init (2)
I (5821) wifi: n:1 0, o:1 1, ap:1 1, sta:1 0, prof:1
I (11451) simcom: State timeout, transition to 2
I (11451) simcom: State: Enter PoweringOn state
I (11451) simcom: Power Cycle
I (12611) housekeeping: System considered stable (free: 41816 bytes)
I (13281) wifi: n:1 1, o:1 0, ap:1 1, sta:1 0, prof:1
I (13291) wifi: state: init -> auth (b0)
I (13301) wifi: state: auth -> assoc (0)
I (13311) wifi: state: assoc -> run (10)
I (13381) wifi: connected with gregnet3, channel 1
I (14401) event: sta ip: 192.168.43.49, mask: 255.255.255.0, gw: 192.168.43.1
I (14401) netmanager: Set DNS#0 9.9.9.9
I (14401) netmanager: Set DNS#1 8.8.8.8
I (14401) netmanager: Interface priority is st1 (192.168.43.49/255.255.255.0 gateway 192.168.43.1)
I (14401) time: Starting SNTP client
I (14411) ovms-mdns: Restarting MDNS service
I (14441) esp32wifi: WiFi UP with SSID: gregnet3, MAC: 30:ae:a4:37:1b:64, IP: 192.168.43.49, mask: 255.255.255.0, gw: 192.168.43.1
I (17571) simcom: State: Enter PoweredOn state
I (37471) simcom: State: Enter MuxStart state
I (37471) gsm-mux: Start MUX
I (37481) gsm-mux: Channel #0 is open
I (37491) gsm-mux: Channel #1 is open
I (37491) gsm-mux: Channel #2 is open
I (37501) gsm-mux: Channel #3 is open
I (37511) gsm-mux: Channel #4 is open
I (38451) simcom: State: Enter NetWait state
I (48471) simcom: CREG Network Registration: RegisteredRoaming
I (49451) simcom: State: Enter NetStart state
I (50491) simcom: PPP Connection is ready to start
I (51451) simcom: State: Enter NetMode state
I (51451) gsm-ppp: Initialising...
I (54551) gsm-ppp: StatusCallBack: None
I (54551) gsm-ppp: status_cb: Connected
I (54551) gsm-ppp:    our_ipaddr  = 10.170.146.142
I (54551) gsm-ppp:    his_ipaddr  = 10.64.64.64
I (54561) gsm-ppp:    netmask     = 255.255.255.255
I (54561) gsm-ppp:    our6_ipaddr = ::
I (54561) netmanager: Set DNS#0 9.9.9.9
I (54561) netmanager: Set DNS#1 8.8.8.8
I (54561) netmanager: Interface priority is st1 (192.168.43.49/255.255.255.0 gateway 192.168.43.1)
I (54561) time: Starting SNTP client
I (54561) ovms-mdns: Restarting MDNS service
W (682451) simcom: 3 minutes since last MUX rx frame - assume MUX has failed
I (682451) gsm-ppp: Shutting down (soft)...
I (682451) netmanager: Interface priority is st1 (192.168.43.49/255.255.255.0 gateway 192.168.43.1)
I (682451) time: Restarting SNTP client
I (682451) ovms-server-v2: Network is reconfigured, so disconnect network connection
I (682451) ovms-mdns: Restarting MDNS service
OVMS >
OVMS >
OVMS > server v2 status
Starting
OVMS > server v2 stop
Stopping OVMS Server V2 connection (oscv2)
OVMS > server v2 status
OVMS v2 server has not been started
OVMS > server v2 start
Launching OVMS Server V2 connection (oscv2)

--- exit ---
greg@linux-0rpb:~/greg/ovms/Open-Vehicle-Monitoring-System-3-master/Open-Vehicle-Monitoring-System-3/vehicle/OVMS.V3> make simple_monitor
--- forcing DTR inactive
--- forcing RTS inactive
--- Miniterm on /dev/ttyUSB0  115200,8,N,1 ---
--- Quit: Ctrl+] | Menu: Ctrl+T | Help: Ctrl+T followed by Ctrl+H ---