Wifi connection lost..... No reconnection

[chathurangawijetunge]

NodeMCU 3.0.0.0 built on nodemcu-build.com provided by frightanic.com
branch: dev
commit: 2fa63a1
release:
release DTS: 202007071335
SSL: false
build type: integer
LFS: 0x40000 bytes total capacity
modules: file,gpio,mqtt,net,node,rtctime,sntp,tmr,uart,wifi
build 2020-07-08 00:54 powered by Lua 5.1.4 on SDK 3.0.1-dev(fce080e)

I am using above build....
In long run wifi gets disconnected and does not reconnect automatically. even if i do a soft reset using node.restart() but if i toggle power supply it reconnects.
had this issue with 4 esp-07 devices .
not sure if it is a bug or not......

[KT819GM]

I've noticed same issue, when in some cases (did not found exact ones, so did not reported yet). Wi-Fi monitor will report 201 when connection lost and not restored. It will not attempt to reconnect till power cycle. Also strange behavior is with #define WIFI_STA_HOSTNAME as after firmware write you have to do power cycle for changes to be reflected. I've checked only 5.3 version only. Any suggestions how to catch fault?

[chathurangawijetunge]

There is definitely something wrong with the wifi sta modul.... wifi gets disconnected after some time and reports 201 and never reconnect until power cycle..
I think this is a bug

[KT819GM]

@chathurangawijetunge Maybe you got any steps to reproduce this constantly? On dev version, LUA5.3 normal reconnection on normal circumstances works okay. I can't remember now what was exact reason when module just got stuck on 201 and will not reconnect till power cycled.

[chathurangawijetunge]

It only happens in long run over 24 hours...

And It happens with both master and dev LUA5.3

getting wifi.eventmon.reason.AUTH_EXPIRE (2)
and
wifi.eventmon.reason.ASSOC_EXPIRE (4)
and somtiles
wifi.eventmon.reason.NO_AP_FOUND (201)

The Device will not auto reconnect even with wifi.sta.disconnect() wifi.sta.connect()
or even with node.restart()
only with hard reset with rts pin or power cycle will connect

3.0-master_20190907 work's fine.

[chathurangawijetunge]

i'v tried
wifi.sta.autoconnect(0)
wifi.sta.config({ssid="ssid",pwd="pwd",auto=false})
wifi.sta.connect()

wifi connection is little stable..... not sure y this is happening

[chathurangawijetunge]

any updates with regards to above situation....?

[nwf]

Glancing at the logs, I don't see anything interesting happening to wifi between 3.0-master_20190907 (i.e. 310faf7) and 2fa63a1, but you might have a go with git bisect to see what happens.

[chathurangawijetunge]

Yes
3.0-master_20190907 work's fine but the issue is with new dev

[chathurangawijetunge]

Any one having this issue....?
It happens in long run >24 hours

[nwf]

It may well be that nobody but you is experiencing this problem (yet); perhaps all our long-running esp8266es are still back on master. Because you are able to reliably see it, please git bisect and tell us when the problem first appeared. Otherwise, I'm afraid you'll just be waiting for someone else to notice, and that might not happen.

[chathurangawijetunge]

It may well be that nobody but you is experiencing this problem (yet); perhaps all our long-running esp8266es are still back on master. Because you are able to reliably see it, please git bisect and tell us when the problem first appeared. Otherwise, I'm afraid you'll just be waiting for someone else to notice, and that might not happen.

i don't know how to do git bisect exactly...
but
3.0-master_20190907 works fine
and the issue is with
3.0-master_20200610 and in (dev)

NO_AP_FOUND (201) after about 12-24 hours no way to recover until power cycle

[KT819GM]

I will leave 2 devices with #995114b LUA53 (I've obsoleted 5.1 in my head already) with weak wifi connection (<-85 dBm) and will respond after few days about results. As I mentioned before I've also had same issue with few boards but somehow I could not identify problem and now it for me it works stable (on the first glance).
Config will be:

station_cfg = {}
wifi.sta.sethostname("WiFitest")
wifi.sta.autoconnect(1)
station_cfg.ssid = "ssid"
station_cfg.pwd = "password"
station_cfg.save = true
wifi.sta.config(station_cfg)

With two eventmon

wifi.eventmon.register(wifi.eventmon.STA_CONNECTED, function(T)
    print("\n\tSTA - CONNECTED" .. "\n\tSSID: " .. T.SSID .. "\n\tBSSID: " ..
              T.BSSID .. "\n\tChannel: " .. T.channel)
end)
wifi.eventmon.register(wifi.eventmon.STA_DISCONNECTED, function(T)
    print("\n\tSTA - DISCONNECTED" .. "\n\tSSID: " .. T.SSID .. "\n\tBSSID: " ..
              T.BSSID .. "\n\treason: " .. T.reason)
    connectedToMqtt = false
end)

Because it will use mqtt, I will add additional check:

function MyMqtt.watch_mqtt()
tmr.create():alarm(10000, tmr.ALARM_AUTO, function()
    if not connectedToMqtt and wifi.sta.getip() ~= nil and wifi.eventmon.STA_CONNECTED == 0 then
        m:close() print('Reconnecting to Mqtt!') collectgarbage()
        tmr.create():alarm(1000, tmr.ALARM_SINGLE, function()
        MyMqtt.Connect()
            end)
        elseif not connectedToMqtt and wifi.sta.getip() == nil then
            wifi.sta.config(station_cfg)
        end
    end)
end

Also mqtt will be as indicator of lost and not restored connection if it will happen.

[chathurangawijetunge]

I will leave 2 devices with #995114b LUA53 (I've obsoleted 5.1 in my head already) with weak wifi connection (<-85 dBm) and will respond after few days about results. As I mentioned before I've also had same issue with few boards but somehow I could not identify problem and now it for me it works stable (on the first glance).
Config will be:

station_cfg = {}
wifi.sta.sethostname("WiFitest")
wifi.sta.autoconnect(1)
station_cfg.ssid = "ssid"
station_cfg.pwd = "password"
station_cfg.save = true
wifi.sta.config(station_cfg)

With two eventmon

wifi.eventmon.register(wifi.eventmon.STA_CONNECTED, function(T)
    print("\n\tSTA - CONNECTED" .. "\n\tSSID: " .. T.SSID .. "\n\tBSSID: " ..
              T.BSSID .. "\n\tChannel: " .. T.channel)
end)
wifi.eventmon.register(wifi.eventmon.STA_DISCONNECTED, function(T)
    print("\n\tSTA - DISCONNECTED" .. "\n\tSSID: " .. T.SSID .. "\n\tBSSID: " ..
              T.BSSID .. "\n\treason: " .. T.reason)
    connectedToMqtt = false
end)

Because it will use mqtt, I will add additional check:

function MyMqtt.watch_mqtt()
tmr.create():alarm(10000, tmr.ALARM_AUTO, function()
    if not connectedToMqtt and wifi.sta.getip() ~= nil and wifi.eventmon.STA_CONNECTED == 0 then
        m:close() print('Reconnecting to Mqtt!') collectgarbage()
        tmr.create():alarm(1000, tmr.ALARM_SINGLE, function()
        MyMqtt.Connect()
            end)
        elseif not connectedToMqtt and wifi.sta.getip() == nil then
            wifi.sta.config(station_cfg)
        end
    end)
end

Also mqtt will be as indicator of lost and not restored connection if it will happen.

At what point does MyMqtt.watch_mqtt() is called..?
do we need to call wifi.sta.autoconnect(1) separately as in wifi.sta.config() defaults is true ...?
and do we have to reconfigure wifi.sta.config(station_cfg) if connection gets lost as wifi.sta.autoconnect is enabled in the beginning...?