ESP8266TimerInterrupt with ESP8266WiFi crashs if disconnected about esp8266timerinterrupt

[khoih-prog]

Hi @Medel,

Thanks for using the library.
Your code has an issue of not adding ICACHE_RAM_ATTR to the ISR.
Try the following code:

#include <ESP8266WiFi.h>
#include <ESP8266TimerInterrupt.h>

const char ssid[] = "***";        //  your network SSID (name)
const char pass[] = "****";       // your network password

ESP8266Timer Timer1;

void ICACHE_RAM_ATTR TimerIrq() 
{
}

void setup() 
{
  Serial.begin(115200);      // open the serial port at 38400 bps:
  Timer1.attachInterruptInterval(100000, TimerIrq);
  WiFi.mode(WIFI_STA);
  WiFi.begin(ssid, pass);
}

void loop()
{
  Serial.print("Millis: ");
  Serial.println(millis());
  Serial.print("IP address: ");
  Serial.println(WiFi.localIP());
  Serial.println(WiFi.status());
  delay(1000);
}

and the tests are all OK, with WiFi and removing WiFi, repetitively.

Here is the terminal output to show the result running the above code, with timestamp

Millis: 19956
IP address: 192.168.2.136                    <= WiFi OK
3
Millis: 20956
IP address: 192.168.2.136
3
Millis: 21956
IP address: 192.168.2.136
3
Millis: 22956
IP address: 192.168.2.136
3
Millis: 23956
IP address: 192.168.2.136
3
Millis: 24956
IP address: 192.168.2.136
3
Millis: 25957
IP address: 192.168.2.136
3
Millis: 26957
IP address: 192.168.2.136
3
Millis: 27957
IP address: (IP unset)                    <= WiFi removed
6
Millis: 28957
IP address: (IP unset)
6
Millis: 29958
IP address: (IP unset)
6
Millis: 30958
IP address: (IP unset)
6
Millis: 31958
IP address: (IP unset)
6
Millis: 32958
IP address: (IP unset)
6
Millis: 33959
IP address: (IP unset)
6
...

Millis: 96977
IP address: (IP unset)
1
Millis: 97977
IP address: (IP unset)
1
Millis: 98977
IP address: (IP unset)
1
Millis: 99977
IP address: (IP unset)
1
Millis: 100978
IP address: (IP unset)
6
Millis: 101978
IP address: (IP unset)
6
Millis: 102978
IP address: 192.168.2.136             <= WiFi OK again
3
Millis: 103979
IP address: 192.168.2.136
3
Millis: 104979
IP address: 192.168.2.136
3
Millis: 105979
IP address: 192.168.2.136
3
Millis: 106979
IP address: 192.168.2.136
3
Millis: 107980
IP address: 192.168.2.136
3
Millis: 108980
IP address: 192.168.2.136
3
Millis: 109980
IP address: 192.168.2.136
3
Millis: 110981
IP address: 192.168.2.136
3
Millis: 111981
IP address: 192.168.2.136
3
...


Millis: 130991
IP address: 192.168.2.136
3
Millis: 131992
IP address: 192.168.2.136
3
Millis: 132992
IP address: 192.168.2.136
3
Millis: 133992
IP address: 192.168.2.136
3
Millis: 134992
IP address: 192.168.2.136
3
Millis: 135993
IP address: 192.168.2.136
3
Millis: 136993
IP address: 192.168.2.136
3
Millis: 137993
IP address: 192.168.2.136
3
Millis: 138993
IP address: (IP unset)                  <= WiFi removed
6
Millis: 139994
IP address: (IP unset)
6
Millis: 140994
IP address: (IP unset)
6
Millis: 141994
IP address: (IP unset)
6
Millis: 142994
IP address: (IP unset)
6
Millis: 143995
IP address: (IP unset)
6
Millis: 144995
IP address: (IP unset)
6
Millis: 145995
IP address: (IP unset)
6
...


Millis: 188006
IP address: (IP unset)
1
Millis: 189006
IP address: (IP unset)
1
Millis: 190006
IP address: (IP unset)
1
Millis: 191007
IP address: (IP unset)
6
Millis: 192007
IP address: (IP unset)
6
Millis: 193007
IP address: 192.168.2.136            <= WiFi OK again
3
Millis: 194008
IP address: 192.168.2.136
3
Millis: 195008
IP address: 192.168.2.136
3
Millis: 196008
IP address: 192.168.2.136
3
Millis: 197008
IP address: 192.168.2.136
3
Millis: 198009
IP address: 192.168.2.136
3
Millis: 199009
IP address: 192.168.2.136
3
Millis: 200009
IP address: 192.168.2.136
3
Millis: 201009
IP address: 192.168.2.136
3
Millis: 202010
IP address: 192.168.2.136
3

[Medel]

Thank you, it works