[Ovmsdev] OVMS v3.3 hardware

[Craig Leres]

I've seen my dev modem go into "user interrupt" several times without 
accompanying uart fifo overflows. So now I doubt there is any connection 
between these two issues.

I've been thinking that a strategy for debugging the "User Interrupt" 
issue would be to wait for the modem to get stuck and then send 
commands. But I guess ppp is implemented in esp-idf? (Maybe I should 
compare with a recent esp-idf to see if there are any interesting 
changes?) Still, I wanted to be able to send commands to the modem 
without fighting with the modem driver. When I looked I found there was 
already a Development modem state but it isn't registered as a command 
and I didn't see how it could be enabled. Is this a reasonable thing for 
me to create a PR to add it?

     @@ -1679,7 +1693,7 @@ CellularModemInit::CellularModemInit()
        cmd_status->RegisterCommand("debug","Show extended CELLULAR 
MODEM status",cellular_status, "", 0, 0, false);

        OvmsCommand* cmd_setstate = 
cmd_cellular->RegisterCommand("setstate","CELLULAR MODEM state change 
framework");
     -  for (int x = modem::CheckPowerOff; x<=modem::PowerOffOn; x++)
     +  for (int x = modem::CheckPowerOff; x<=modem::Development; x++)
          {
 
cmd_setstate->RegisterCommand(ModemState1Name((modem::modem_state1_t)x),"Force 
CELLULAR MODEM state change",modem_setstate);
          }

I tried that but then it's very difficult to do anything interactive 
with the modem when in Development state due to the many printouts that 
get enabled, e.g:

     void modem::tx(uint8_t* data, size_t size)
       {
       if (!m_task) return; // Quick exit if not task (we are stopped)

       if (m_state1 == Development)
         { DevelopmentHexDump("tx", (const char*)data, size); }

       uart_write_bytes(m_uartnum, (const char*)data, size);
       }

(I get flooded with the gnss/nmea messages.) What's a good way to add 
the ability to disable these? A new "Development2" state? Maybe tie 
these messages to a new "cellular-trace" tag?

		Craig