Fipy : Guru Meditation Error when I try to connect my socket

Malo

Hello,

Every time I try to connect my socket in order to test my connectity in LTE CAT-M to internet I have a Guru Meditation Error.

My main code is as follow :

import pycom # we need this module to control the LED
import math
import os
import socket
import ssl
import time
from  network import LTE
from network import Bluetooth
from network import LoRa
from network import WLAN
from network import Server
from LTEfunction import func
from machine import SD
from pytrack import Pytrack
from L76GNSV4 import L76GNSS

print()

print('Switching off Heartbeat')
pycom.heartbeat(False)
pycom.rgbled(0x000000)

print('Switching off WLAN')
wlan = WLAN()
wlan.deinit()

print('Switching off Server')
server = Server()
server.deinit()

print('Switching off Bluetooth')
bt = Bluetooth()
bt.deinit()

print('Switching off LoRa')
lora = LoRa(mode=LoRa.LORAWAN, region=LoRa.EU868, power_mode=LoRa.SLEEP)

wakeReason = machine.wake_reason()
#print("Wake Reason = " + str(wakeReason[0]))

try:
   py = Pytrack()                                        # Expansion Board Init
except:
    print("ERROR : Pytrack non available")
l76 = L76GNSS(pytrack=py,timeout=30, debug=False)    # GPS Init

SDInBoard =0

# setup SD card
try:
    sd = SD()
    os.mount(sd, '/sd')
    LoF = os.listdir('/sd')
    SDInBoard = 1
except:
    SDInBoard = 0
    print ("WARNING : Put a SD card if you want some records")

if(SDInBoard == 1):
    i = 0
    nameFound = 0
    while nameFound == 0:
        RecordFileName = 'LTEGPS-record'+str(i)+'.txt'
        j = 0
        namePresent = 0
        while j < len(LoF):
            if RecordFileName == LoF[j]:
                namePresent = 1
                break
            else:
                j+=1

        if((j>=len(LoF)) and namePresent == 0):
            nameFound = 1
            break
        else:
            i+=1

    if(wakeReason[0] != 0 and i > 0):
        RecordFileName = 'LTEGPS-record'+str(i-1)+'.txt'
    print("INFO : RecordFileName : " + RecordFileName)

lteAttached = 0
lteData = 0
lteConnected = 0

functionLTE = func()
#functionLTE.lteFuncDeInit()                         # DeInit of the LTE Modem

functionLTE.lteFuncInit()                             # LTE Modem Init

#pycom.rgbled(0x007f00) # green

loc = l76.get_location(debug=False)                   # Get localization with the GPS
tim = l76.getUTCDateTime(debug=False)                 # Get date and time with the GPS

lteAttached = functionLTE.lteFuncAttach(80)           # Start LTE Attach
if lteAttached != 0:                                  # If attached
    lteConnected = functionLTE.lteFuncConnect(20)     # Start LTE Connect
    if lteConnected:                                  # If connected
        lteData = functionLTE.lteFuncSocket()         # Start a socket in order to receive data
        #lteData = functionLTE.lteFuncMQTT(msgFipy="Date : {} - LOC : {}".format(tim, loc))

functionLTE.lteFuncDeInit()                           # Reset & DeInit of the LTE Modem

if(SDInBoard == 1):                                   # Record data in the SD if a SD card is inserted
    try:
        pycom.rgbled(0x7f0000) # red
        f = open('/sd/' + RecordFileName, 'a')
        f.write("Date : {} - loc : {}\t".format(tim, loc))
        f.write("LTE Attached: "+str(lteAttached)+",\tLTE Connected: "+str(lteConnected)+",\tLTE Data: "+str(lteData)+"\n")
        f.close()
        pycom.rgbled(0x0)
    except:
        print ("ERROR : SD card not reachable anymore")

print("INFO : Date : {} - LOC : {}".format(tim, loc))
print("INFO : LTE Attached: "+str(lteAttached)+", LTE Connected: "+str(lteConnected)+", LTE Data: "+str(lteData)+"\n")

machine.deepsleep(2000)

The LTE functions code is below.

import socket
import ssl
import time
import machine
from  network import LTE
from mqtt import MQTTClient
from network import WLAN

class func:
    def sub_cb(self,topic, msg):
       print(msg)
    def lteFuncInit(self):
        self.lte = LTE()         # instantiate the LTE object
        #self.lte.init()
        print(self.lte.imei())
        print(self.lte.iccid())
        #print(lte.send_at_cmd('AT!="showver"'))
        print(self.lte.send_at_cmd('AT+CGCONTRDP'))
    def lteFuncAttach(self, timeout):
        i=0
        self.lte.attach()        # attach the cellular modem to a base station
        print ("LTE Attach :")
        while (not self.lte.isattached()) and (i <= timeout) :
            time.sleep(0.25)
            #print (".", end="")
            i+=1

        if(self.lte.isattached()):
            print("i attach : "+ str(i))
            print (" Attached OK")
            return 1
        else:
            print (" Attached NOK")
            return 0


    def lteFuncConnect(self, timeout):
        i=0
        self.lte.connect()       # start a data session and obtain an IP address
        print ("LTE connect :")
        while (not self.lte.isconnected()) and (i <= timeout):
            time.sleep(0.25)
            #print (".", end="")
            i+=1

        if self.lte.isconnected():
            print("i connect : "+ str(i))
            print (" Connect OK")
            return 1
        else:
            print (" Connect NOK")
            try:
                self.lte.dettach()
            except:
                print ("ERROR : LTE dettach problem")
            return 0

    def lteFuncSocket(self):
        print ("Creation Socket")
        s = socket.socket()
        print("AFTER CREATE SOCKET")
        s = ssl.wrap_socket(s)
        print("AFTER WRAP")
        s.connect(socket.getaddrinfo('8.8.8.8', 443)[0][-1])  # Error at this line
        print("Socket Connected")
        s.send(b"GET / HTTP/1.0\r\n\r\n")
        print(s.recv(4096))
        try:
            s.close()
            self.lte.disconnect()
            self.lte.dettach()
        except:
            print ("ERROR : Socket close, LTE deconnect and/or dettach problem")
        if s.recv(4096) != "":
            return 1
        else:
            return 0
    def lteFuncMQTT(self, msgFipy):
        client = MQTTClient("FiPy", "52.70.203.194",user="XXXX", password="XXXXXXXXXXXXXXXX", port=1883)

        client.set_callback(self.sub_cb)
        print("MQTT")
        client.connect()
        print("Connected")
        client.subscribe(topic="MaloM/feeds/FipyPos")

        print("Sending ...")
        client.publish(topic="MaloM/feeds/FipyPos", msg=msgFipy)
        print("End Send")

        try:
            self.lte.disconnect()
            self.lte.dettach()
        except:
            print ("ERROR : LTE deconnect and/or dettach problem")
        return 1
    def lteFuncDeInit(self):
         print('Switching off LTE')
         quit = False
         while quit == False:
             try:
                 self.lte.deinit()
             except OSError:
                 print('  Exception occured and retrying...')
                 #machine.reset()
             else:
                 quit = True

Below you can see a copy of the console with the error.

rst:0x7 (TG0WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff8028,len:8
load:0x3fff8030,len:1984
load:0x4009fa00,len:0
load:0x4009fa00,len:19088
entry 0x400a05e4
Initializing filesystem as FatFS!

Switching off Heartbeat
Switching off WLAN
Switching off Server
Switching off Bluetooth
Switching off LoRa
INFO : RecordFileName : LTEGPS-record4.txt
Switching off LTE
LTE Attach :
i attach : 53
 Attached OK
LTE connect :
i connect : 0
 Connect OK
Creation Socket
AFTER CREATE SOCKET
AFTER WRAP
Guru Meditation Error: Core  1 panic'ed (InstrFetchProhibited). Exception was unhandled.
Core 1 register dump:
PC      : 0x00000000  PS      : 0x00060a30  A0      : 0x800fa655  A1      : 0x3ffe2ec0
A2      : 0x3f955b10  A3      : 0x3f955b26  A4      : 0x3f955b34  A5      : 0x00000000
A6      : 0x00000000  A7      : 0x00000a6e  A8      : 0x800e4197  A9      : 0x3ffe2ea0
A10     : 0x3f955b10  A11     : 0x3f955b26  A12     : 0x000001bb  A13     : 0x3f955b34
A14     : 0x000000fe  A15     : 0x3fbc1467  SAR     : 0x0000001a  EXCCAUSE: 0x00000014
EXCVADDR: 0x00000000  LBEG    : 0x4009cb8c  LEND    : 0x4009cb97  LCOUNT  : 0xffffffff

Backtrace: 0x00000000:0x3ffe2ec0 0x400fa652:0x3ffe2ef0 0x400f6e69:0x3ffe2f10 0x400f6ed1:0x3ffe2f30 0x40102472:0x3ffe2f50 0x400fa744:0x3ffe2ff0 0x400f6e69:0x3ffe3020 0x400f6ed1:0x3ffe3040 0x40102472:0x3ffe3060 0x400fa744:0x3ffe3100 0x400f6e69:0x3ffe3180 0x400f6e96:0x3ffe31a0 0x400df22e:0x3ffe31c0 0x400df4a1:0x3ffe3260 0x400de181:0x3ffe3280

================= CORE DUMP START =================
9DgAABEAAABsAQAA
pFr8PwAu/j9YNP4/
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BQAAAFwE/j9NaWNyb1B5AAAAAAAAAAAAAQAAAFg0/j8AAAAAIAgGAAUAAAAAAAAA
5Hb7PwSs/D8AAAAAAAAAAAAAAAA4yf0/oMn9PwjK/T8AAAAAAAAAAAEAAAAAAAAA
V2xAPwAAAAAg0glAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAgAAAA==
AAD/AAAAAAAwCgYAVaYPgMAu/j8QW5U/JluVPzRblT8AAAAAAAAAAG4KAACXQQ6A
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tyCVPxAx/j8AAAAASgIAAOBBCIBwMf4/kDH+PwAAAAAAAAAAAAAAAAAAAAAAAAAA
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paWlpaWlpaWlpaWlpaWlpaWlpaWlpaWlpaWlpaWlpaXQNghAqNwNQDAABQAAAAAA
8DP+PwAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAP////8AAAAA////////////////
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AgEAAAAAAAAA4BsAgDL+PwAAKAAAAAAAAAAAAKgz/j9QM/4/AAAAAAAAAAAAAAAA
AAAAAAEAAAAAAAAAWCFAPwAAAAAAAAAAAAAAAAAAAAABAAAAAAAAAPwz/j8AAAAA
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IK/9PwBS/j9oU/4/
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AAAAAAAAAAAAAAAA
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AAAAAICu/T/ABRhAAAAAAAAAAACArv0/wAUYQAAAAACsFf0/rBX9P6gV/T+oFf0/
AAAAALCu/T8AAAAAAAAAACQUvD8AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
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xNb7P+BV+z/kV/s/
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tLb9P2B1/j9wd/4/
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AAAAAAAAAAAAAAAA
================= CORE DUMP END =================
Rebooting...
ets Jun  8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff8028,len:8
load:0x3fff8030,len:1984
load:0x4009fa00,len:0
load:0x4009fa00,len:19088
entry 0x400a05e4
Initializing filesystem as FatFS!

My Fipy is running 1.20.0.rc4

Thanck you.

Best regards,

Malo

iwahdan

@malo said in Fipy : Guru Meditation Error when I try to connect my socket:

import socket
import ssl
import time
import machine
from network import LTE
from mqtt import MQTTClient
from network import WLAN

class func:
def sub_cb(self,topic, msg):
print(msg)
def lteFuncInit(self):
self.lte = LTE() # instantiate the LTE object
#self.lte.init()
print(self.lte.imei())
print(self.lte.iccid())
#print(lte.send_at_cmd('AT!="showver"'))
print(self.lte.send_at_cmd('AT+CGCONTRDP'))
def lteFuncAttach(self, timeout):
i=0
self.lte.attach() # attach the cellular modem to a base station
print ("LTE Attach :")
while (not self.lte.isattached()) and (i <= timeout) :
time.sleep(0.25)
#print (".", end="")
i+=1

    if(self.lte.isattached()):
        print("i attach : "+ str(i))
        print (" Attached OK")
        return 1
    else:
        print (" Attached NOK")
        return 0


def lteFuncConnect(self, timeout):
    i=0
    self.lte.connect()       # start a data session and obtain an IP address
    print ("LTE connect :")
    while (not self.lte.isconnected()) and (i <= timeout):
        time.sleep(0.25)
        #print (".", end="")
        i+=1

    if self.lte.isconnected():
        print("i connect : "+ str(i))
        print (" Connect OK")
        return 1
    else:
        print (" Connect NOK")
        try:
            self.lte.dettach()
        except:
            print ("ERROR : LTE dettach problem")
        return 0

def lteFuncSocket(self):
    print ("Creation Socket")
    s = socket.socket()
    print("AFTER CREATE SOCKET")
    s = ssl.wrap_socket(s)
    print("AFTER WRAP")
    s.connect(socket.getaddrinfo('8.8.8.8', 443)[0][-1])  # Error at this line
    print("Socket Connected")
    s.send(b"GET / HTTP/1.0\r\n\r\n")
    print(s.recv(4096))
    try:
        s.close()
        self.lte.disconnect()
        self.lte.dettach()
    except:
        print ("ERROR : Socket close, LTE deconnect and/or dettach problem")
    if s.recv(4096) != "":
        return 1
    else:
        return 0
def lteFuncMQTT(self, msgFipy):
    client = MQTTClient("FiPy", "52.70.203.194",user="XXXX", password="XXXXXXXXXXXXXXXX", port=1883)

    client.set_callback(self.sub_cb)
    print("MQTT")
    client.connect()
    print("Connected")
    client.subscribe(topic="MaloM/feeds/FipyPos")

    print("Sending ...")
    client.publish(topic="MaloM/feeds/FipyPos", msg=msgFipy)
    print("End Send")

    try:
        self.lte.disconnect()
        self.lte.dettach()
    except:
        print ("ERROR : LTE deconnect and/or dettach problem")
    return 1
def lteFuncDeInit(self):
     print('Switching off LTE')
     quit = False
     while quit == False:
         try:
             self.lte.deinit()
         except OSError:
             print('  Exception occured and retrying...')
             #machine.reset()
         else:
             quit = True

Hello @Malo ,

I could reproduce the crash using your code, I'll keep you updated with my analysis.

Thanks for your help.

iwahdan

Hello @Malo , the Issue is indeed in Firmware, this crash is reproducible only when LoRa/Sigfox is initialised before LTE as you have in your Code, I'll push a Fix to be included in next stable and Development release.
For now you can fix this issue by removing LoRa init if you don't use it or do it after LTE connection.

Malo

Hello @iwahdan,
I put the LoRa Init after the LTE connection and it works now ! Thank you.
Best Regards,
Malo

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