Exception(2) after connect to Accespoint #1767
Comments
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I'm also getting this with the included telnet serial example on a ESP-12 (adafruit huzzah if that matters) on board package version 2.1.0 but it works fine on 2.0.0. many other examples work fine. my serial output is: load 0x4010f000, len 1264, room 16 Exception (2): ctx: sys
(FWIW, the "code" markdown doesn't seem to be working here.) |
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Hi... change your sketch setup: remove the line with or change the parameter to false.... it worked for me. for more information have a look at issue #1695 greetz fussel |
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Hi fussel, Thanks a lot! |
Basic Infos
Hardware
Hardware: ESP-01
Core Version: 2.1.0 (via "stable" in Board-Manager; Arduino 1.6.8)
Description
Exception(2) after connect to Accesspoint.
I am using a ESP-01 with Arduino 1.6.8. I started with the Serial Telnet Example and are getting the above Exception after I got a connection to my acces point.
I tested using two different ESP-Modules.
The epc1=0x3ffe86d0 is constant, so no sparadic problem.
I used two different Access Points an different WPA settings.
Power is from a 3.3V 800 mA Buck power Supply from 12V 2 Amp Supply, not extra capacitors.
Serial is a FTDI 3,3V Board.
I included the elf file and the sketch here:
elf_and_bin.zip
sketch.zip
I have kept the reset of the sketch-temp-folder, if you need more
The error is 100% reproducible with other sekteches in my envoronment. Strangely using the Wifimanager (another sektch) works - you can connect to the accespoint, access the captive gui and choose a wifi. As soon as you have done that the same error occurs until you reset the wfifimanger-data.
Any ideas?
Thanks in advance.
Settings in IDE
Module: Generic ESP8266 Module
Flash Size: 512K (64K SPIFFS)
CPU Frequency: 80Mhz
Flash Mode: DIO
Flash Frequency: 40Mhz
Upload Using: SERIAL
Reset Method: ck
Sketch
`
include <ESP8266WiFi.h>
//how many clients should be able to telnet to this ESP8266
define MAX_SRV_CLIENTS 1
const char* ssid = "markusTest";
const char* password = "passwdTestasdf";
WiFiServer server(23);
WiFiClient serverClients[MAX_SRV_CLIENTS];
void setup() {
Serial.begin(115200);
WiFi.begin(ssid, password);
Serial.print("\nConnecting to "); Serial.println(ssid);
uint8_t i = 0;
while (WiFi.status() != WL_CONNECTED && i++ < 20) delay(500);
if(i == 21){
Serial.print("Could not connect to"); Serial.println(ssid);
while(1) delay(500);
}
//start UART and the server
Serial.begin(115200);
server.begin();
server.setNoDelay(true);
Serial.print("Ready! Use 'telnet ");
Serial.print(WiFi.localIP());
Serial.println(" 23' to connect");
}
void loop() {
uint8_t i;
//check if there are any new clients
if (server.hasClient()){
for(i = 0; i < MAX_SRV_CLIENTS; i++){
//find free/disconnected spot
if (!serverClients[i] || !serverClients[i].connected()){
if(serverClients[i]) serverClients[i].stop();
serverClients[i] = server.available();
Serial.print("New client: "); Serial.print(i);
continue;
}
}
//no free/disconnected spot so reject
WiFiClient serverClient = server.available();
serverClient.stop();
}
//check clients for data
for(i = 0; i < MAX_SRV_CLIENTS; i++){
if (serverClients[i] && serverClients[i].connected()){
if(serverClients[i].available()){
//get data from the telnet client and push it to the UART
while(serverClients[i].available()) Serial.write(serverClients[i].read());
}
}
}
//check UART for data
if(Serial.available()){
size_t len = Serial.available();
uint8_t sbuf[len];
Serial.readBytes(sbuf, len);
//push UART data to all connected telnet clients
for(i = 0; i < MAX_SRV_CLIENTS; i++){
if (serverClients[i] && serverClients[i].connected()){
serverClients[i].write(sbuf, len);
delay(1);
}
}
}
}
`
Debug Messages
Connecting to markusTest
Ready! Use 'telnet 192.168.178.30 23' to connect
Exception (2):
epc1=0x3ffe86d0 epc2=0x00000000 epc3=0x00000000 excvaddr=0x3ffe86d0 depc=0x00000000
ctx: sys
sp: 3ffffc90 end: 3fffffb0 offset: 01a0
ets Jan 8 2013,rst cause:2, boot mode:(1,6)
ets Jan 8 2013,rst cause:4, boot mode:(1,6)
wdt reset
Stack Decoded:
Decoding 23 results
0x40211835: scan_parse_beacon at ?? line ?
0x40211895: scan_parse_beacon at ?? line ?
0x4021177d: scan_parse_beacon at ?? line ?
0x4020df59: ieee80211_parse_beacon at ?? line ?
0x40107020: printf at C:\Users\markus\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.1.0\cores\esp8266/libc_replacements.c line 206
0x4010549c: chm_get_current_channel at ?? line ?
0x402038c0: loop_task at C:\Users\markus\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.1.0\cores\esp8266/core_esp8266_main.cpp line 43
0x4010031d: check_poison at C:\Users\markus\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.1.0\cores\esp8266\umm_malloc/umm_malloc.c line 817
0x40100426: check_poison_block at C:\Users\markus\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.1.0\cores\esp8266\umm_malloc/umm_malloc.c line 851
0x40209402: esf_buf_recycle at ?? line ?
0x40100537: check_poison_all_blocks at C:\Users\markus\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.1.0\cores\esp8266\umm_malloc/umm_malloc.c line 880
0x4020707c: ppRecycleRxPkt at ?? line ?
0x401008c1: free at C:\Users\markus\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.1.0\cores\esp8266\umm_malloc/umm_malloc.c line 1717
0x40211e8e: sta_input at ?? line ?
0x40107218: vPortFree at C:\Users\markus\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.1.0\cores\esp8266/heap.c line 18
0x4021c969: sys_check_timeouts at ?? line ?
0x40223ab1: ets_timer_handler_isr at ?? line ?
0x40223af6: ets_timer_handler_isr at ?? line ?
0x402038e3: loop_task at C:\Users\markus\AppData\Local\Arduino15\packages\esp8266\hardware\esp8266\2.1.0\cores\esp8266/core_esp8266_main.cpp line 43
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