No wifi reconnection after connection loss - Heishamon Large (ESP32)

[oxyde42]

Sometimes my Heishamon loses the wifi connection, but there is no reconnection.

Has this been forgotten for the ESP32?

void check_wifi() {
int wifistatus = WiFi.status();
if ((wifistatus != WL_CONNECTED) && (WiFi.localIP())) {
// special case where it seems that we are not connect but we do have working IP (causing the -1% wifi signal), do a reset.
#ifdef ESP8266
log_message(_F("Weird case, WiFi seems disconnected but is not. Resetting WiFi!"));
setupWifi(&heishamonSettings);
#else // here for ESP32
log_message(_F("WiFi just got disconnected, still have IP addres."));
#endif
...

Or can a reconnection be triggered with a rule?

[geduxas]

I can confirm this behavior, i noticed after updating rebooting my AP heishamon will go to failsafe hotspot mode, and will not reconnect, just rebooted heishamon and it connect's back.

[IgorYbema]

No there is something else weird going on with ESP32 wifi. I haven't figured it out yet. Will keep searching when I have some more spare time

[oxyde42]

I have found the problem. It is a logical error in the function check_wifi(). The ESP32 also loses the IP address at the same time as the connection. This means that result of line 173 is always false:
if ((wifistatus != WL_CONNECTED) && (WiFi.localIP()))

On the ESP32 you get the correct information WL_CONNECTION_LOST as wifistatus if the connection is lost.

I suggest the following change:

void check_wifi() {
int wifistatus = WiFi.status();
#ifdef ESP8266
if ((wifistatus != WL_CONNECTED) && (WiFi.localIP())) {
#else
if (wifistatus == WL_CONNECTION_LOST) {
#endif
// special case where it seems that we are not connect but we do have working IP (causing the -1% wifi signal), do a reset.
log_message(_F(“Weird case, WiFi seems disconnected but is not. Resetting WiFi!”));
setupWifi(&heishamonSettings);

} else if ((wifistatus != WL_CONNECTED) || (!WiFi.localIP())) {
...

[IgorYbema]

No that is not it. That if statement is specially written for the ESP8266 which can be in this state. I know that for the ESP32 it will never go in that statement.
The next if is for the real check (else if ((wifistatus != WL_CONNECTED) || (!WiFi.localIP()))
From there it sometimes doesn't go to the part where it retries the connection.
I'll try to debug more later.