@ScruffR, agree 100% (I normally always work with the latest).
Compiled against DeviceOS 1.2.1.rc-2, but As you might expect, the problem is still evident...
Here is log output before the SOS:
0000292355 [app] WARN: => !P.conn
0000293359 [app] WARN: => !P.conn
0000294362 [app] WARN: => !P.conn
0000295366 [app] WARN: => !P.conn
0000296370 [app] WARN: => !P.conn
0000297374 [app] WARN: => !P.conn
0000298378 [app] WARN: => !P.conn
0000299382 [app] WARN: => !P.conn
0000300386 [app] WARN: => !P.conn
0000301390 [app] WARN: => !P.conn
0000302184 [hal.wlan] TRACE: connect cancel
0000302188 [hal] TRACE: 20015b04 socket list: 0 active sockets closed
0000302188 [hal] TRACE: 20015b0c socket list: 0 active sockets closed
I have made some progress this afternoon. Reading through an earlier post looking for clues: No WiFi blocks loop() - specifically Serial1 reception, @Elco's comment regarding "overflowing the system thread" caught my eye.
I was calling my "WiFiStateMachine()" routine every 200 ms. Am now calling it every 1000 ms.
This change has improved:
- the time it takes for the device to pick up the change mobile's data status (enabled or disabled).
- connect to the Wifi hotspot
But unfortunately the problem still occurs (but takes longer to reproduce...)
Here is the WiFiStateMachine() function call "as is" for the record (as stated, based on @Rickkas7 code):
#ifdef WIFI_RECONNECT_STRATEGY
///
/// v1.16.0 2016-08-04
/// Strategy overcomes issue where once WiFi is disconnected,
/// it does not reconnect
/// Refer to "TCPCLIENT intranet connection fails if no cloud connection
/// https://community.particle.io/t/tcpclient-intranet-connection-fails-if-no-cloud-connection/24684
///
///
/// Refer https://community.particle.io/t/no-wifi-blocks-loop-specifically-serial1-reception/43227
/// Might be overwhelming the system thread if performing the following
/// on every loop() iteration, so only checking every 200 mS
///
/// NOTE is called every 200 mS
///
void WiFiStateMachine(void)
{
enum WifiState { WIFI_STATE_NOT_CONNECTED, WIFI_STATE_CONNECTING,
WIFI_STATE_CONNECTED, WIFI_STATE_RUNNING };
static WifiState wifiState = WIFI_STATE_NOT_CONNECTED;
static uint16_t nTickCountDownParticle = 0;
static uint16_t particleConnectRetryMins = 0;
static bool bLoggedWiFiDetails = false; // Only want to report once per session
switch(wifiState)
{
// ++++++++++++++++++++++++++
case WIFI_STATE_NOT_CONNECTED:
// ++++++++++++++++++++++++++
Log.info("W connecting..");
// NOTE: Following is not necessary because of prior calls to
// WiFi.connect() and/or Particle.connect()
// WiFi.connect(); // NOTE: No need to ever call again, it keeps on trying
wifiState = WIFI_STATE_CONNECTING;
break; // WIFI_STATE_NOT_CONNECTED:
// ++++++++++++++++++++++++++
case WIFI_STATE_CONNECTING:
// ++++++++++++++++++++++++++
// Checking IP is a workaround for bug
// where WiFi.ready() returns true with IP 0.0.0.0
if (WiFi.ready() && WiFi.localIP()) // same as (WiFi.localIP()[0] != 0)
{
wifiState = WIFI_STATE_CONNECTED;
}
// The WiFi.connect() call never times out, it will keep trying forever
// so there's no need to call WiFi.connect() again here.
break; // WIFI_STATE_CONNECTING:
// ++++++++++++++++++++++++++
case WIFI_STATE_CONNECTED:
// ++++++++++++++++++++++++++
// Do any one-time initialization here like calling udp.begin() or tcpServer.begin()
Log.info("W conn");
// Refer https://community.particle.io/t/udp-broadcast-listeners-stop-listening-over-time/38391/2
// When WiFi disconnects, all listeners are removed, and not re-created.
// So when a disconnect is detected and you reconnect,
// call UDP.begin() and TCPServer.begin() again.
#ifdef TCP_SERVER_ENABLED
if (configs.fMode2 & MODE_2_FLAG_TCP_SERVER)
{
// TCP Server - start listening for clients
Log.info("tcpSrv.bgn");
tcpServer.begin();
}
#endif // TCP_SERVER_ENABLED
// 2018-07-21 v4.06.2 Removed as not required/may be bad practice
// Also connect to the Particle cloud
// Particle.connect();
// Kick off a check for INET connectivity, if good,
// kicks off Particle.connect()
nTickCountDownParticle = 8 * WIFISTATEMACHINE_TICKS_PER_SEC;
particleConnectRetryMins = 0; // reset Nagle algorithm
wifiState = WIFI_STATE_RUNNING;
break; // WIFI_STATE_CONNECTED:
// ++++++++++++++++++++++++++
case WIFI_STATE_RUNNING:
// ++++++++++++++++++++++++++
// Checking IP is a workaround for bug
// where WiFi.ready() returns true with IP 0.0.0.0
if (!(WiFi.ready() && WiFi.localIP()))
{
Log.warn("As W.rdy=%d localIP=%d, disc!",
WiFi.ready(), (bool)(WiFi.localIP()));
WiFi.disconnect(); // <<<<<<-----------
Log.info("W.conn");
WiFi.connect(WIFI_CONNECT_SKIP_LISTEN); // <<<<<<-----------
wifiState = WIFI_STATE_CONNECTING;
// May not be absolutely necessary, but perhaps good practice
// to close TCP listeners
#ifdef TCP_SERVER_ENABLED
if (configs.fMode2 & MODE_2_FLAG_TCP_SERVER)
{
tcpServer.stop();
}
#endif // TCP_SERVER_ENABLED
if (configs.fMode2 & MODE_2_FLAG_INTRANET_ONLY)
{
// No need for a cloud connection
// Connecting to other services on the *intranet* and
// therefore don't want Particle.connect() dropping WiFi.
Log.warn("P.disc"); // Does NOT drop WiFi
Particle.disconnect();
}
// No need to call WiFi.connect(), it continually keeps retrying
}
else
{
// We have WiFi, therefore we can check for Particle connection
// (at regular intervals)
if ((configs.fMode2 & MODE_2_FLAG_INTRANET_ONLY) &&
(nTickCountDownParticle == 0) &&
!Particle.connected())
{
// Only call once for this outage
Log.warn("W !cloud ->P.disc");
Particle.disconnect(); // Does NOT drop WiFi
// Try a Particle.connect() in 30 secs
nTickCountDownParticle = 30 * WIFISTATEMACHINE_TICKS_PER_SEC;
particleConnectRetryMins = 0; // reset Nagle algorithm
}
}
break; // WIFI_STATE_RUNNING:
} // switch(WiFiState)
// -----------------------------------------------
// Check for Particle connected every now and then
// -----------------------------------------------
if (nTickCountDownParticle > 0)
{
if (!Particle.connected())
{
Log.warn("=> !P.conn");
if (!--nTickCountDownParticle)
{
// Give up trying to Particle.connect()!
// Just check for internet connectivity from now on
// NOTE: CheckForInternet() blocks for 1 sec
// if there is WiFi but no internet connection
if (CheckForInternet()) // also checks WiFi.ready()
{
Log.info("INET->P.conn");
Particle.connect(); // ****** NOTE ******
// Need to do this so that Particle has time to come up
// otherwise Particle.disconnect() will be immediately
// called in WIFI_STATE_RUNNING
nTickCountDownParticle = 8 * WIFISTATEMACHINE_TICKS_PER_SEC;
particleConnectRetryMins = 0; // reset Nagle algorithm
}
else // No internet
{
// Implement simple "Nagle" back off algorithm
// 1,2,3,4,5,5,5... mins
particleConnectRetryMins =
(particleConnectRetryMins < 5)
? particleConnectRetryMins + 1
: 5;
Log.warn("No INET retry tst %dm",
particleConnectRetryMins);
nTickCountDownParticle =
particleConnectRetryMins * 60
* WIFISTATEMACHINE_TICKS_PER_SEC;
}
}
}
else // Particle is connected
{
Log.info("P.conn OK");
nTickCountDownParticle = 0; // stop the count down
particleConnectRetryMins = 0; // reset Nagle algorithm
if (!bLoggedWiFiDetails)
{
// Only want to report once per session
bLoggedWiFiDetails = true;
LogWiFiDetailsAndPublish(); // Calls Chariot.log()
}
}
}
} // WiFiStateMachine()
#endif // WIFI_RECONNECT_STRATEGY
////////////////////////////////////////////////////////////
/// Returns true if WiFi is up and connected to the internet
////////////////////////////////////////////////////////////
bool CheckForInternet(void)
{
bool rc = false;
unsigned long time = millis();
if (WiFi.ready() && WiFi.localIP())
{
rc = (WiFi.ping(ipInternetCheck, 1) == 1);
}
Log.info("ChkINET=%d %lums", rc, millis() - time);
return(rc);
} // CheckForInternet()
Looking forward to any assistance that can be offered here....