We have fixed that long annoying GC bug that was causing lots of unexplainable crashes. The full change log is the following:

• Update to the latest IDF.
• Dump the registers on the stack before a gccollect.
• Allocate the mptask stack and TCB statically. This resolves all the weird issues found with threading and the gc.
• Add timeout_chars parameter to the UART constructor. https://docs.pycom.io/pycom_esp32/library/machine.UART.html#machine.uart.init

If you don't have the latest updater tool, make sure to get it from here: https://www.pycom.io/resources/

@Colateral @livius @jmarcelino Please give this release a try and let us know, hopefully your tests will also show that the bug is gone. Thanks!

Cheers,
Daniel

I (179506) wifi: n:1 1, o:1 0, ap:255 255, sta:1 1, prof:6
I (179507) wifi: state: init -> auth (b0)
I (179509) wifi: state: auth -> assoc (0)
I (179517) wifi: state: assoc -> run (10)
I (179527) wifi: connected with Imalog, channel 1
ets Jun 8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
ets Jun 8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
ets Jun 8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
ets Jun 8 2016 00:2úýets Jun 8 2016 00:22:57

òets Jun 8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
ets Jun 8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
ets Jun 8 2016 00:22:57

rst:0x10 (RTCWDT_RTC_RESET),boot:0x33 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0x00
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:QIO, clock div:2
load:0x3fff9010,len:8
load:0x3fff9018,len:248
load:0x40078000,len:4056
load:0x4009fc00,len:920
entry 0x4009fde4

There is a problem with the SD card functionality. Plug the board and then run the sample script (SD example).
from machine import SD
import os

        sd = SD()
        os.mount(sd, '/sd')
        f = open('/sd/a.cfg')
        data = f.read()
        f.close()

Everything works fine on first run.
Run again the script: [Errno 2] ENOENT is raising on SD card init and the board is hanging. It is funny that you press power reset button and the issue is still persistent after reset. Only if you unplug the usb cable and plug again will make it work.

We have fixed that long annoying GC bug that was causing lots of unexplainable crashes.

Now, my little script with DS18B20, Wifi and MQTT is up and running. gc.collect() do not crash as it did before. I'll let the script run for a longer time. We'll see how stable it has become :)
Thanks for the update!

What is Happened with Lora in Release 1.6.5.b1 and 1.6.4.b1
I have a Working program that works in the previous versions.
Now it send data but I have a lot of missing massages.

I have Two LOPY boards with Extension Board. one with the latest version 1.6.5.b1 and one with version 1.6.0.b1 the newest firmware version missed a lot of messages

import machine
import socket
import time
import binascii
import pycom

from network import LoRa

print("Initializing LoRa module...")

lora = LoRa(mode=LoRa.LORA,
frequency=868100000,
tx_power=14,
bandwidth=LoRa.BW_125KHZ,
sf=7,
coding_rate=LoRa.CODING_4_5,
power_mode=LoRa.TX_ONLY)

lora_sock = socket.socket(socket.AF_LORA, socket.SOCK_RAW)
lora_sock.setblocking(False)

print("Ready to send data...")

msg_elements = [0xff, 0xff, 0x00, 0x00, 75, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]

msg = bytearray(msg_elements)

while (True):
lora_sock.send(msg)
print("Sent: ", binascii.hexlify(msg, ' '))
time.sleep(4)

I have stripped my software, above is working and give the same problem.
why is above working with previous firmware versions and not with the newest version(1.6.4.b1 & 1.6.5.B1)?

Cheers,
Daniel

1. Is HALL sensor enabled in esp-idf?
   i see that it should be accessible -
   https://github.com/espressif/esp-idf/blob/dca0377e19c6e514c0c694b521c3495a6d46c3af/docs/api/peripherals/adc.rst
2. Is pin touch function enabled?
3. is telnet delete work ok? I suppose no - it delete wrong char.
   backspace work ok but del not

Regards, Mark

from machine import SD
import uos

try:
    sd = SD(0)
except Exception as e: 
    print ("Exception SDCard : %s " % (e)) 
    
try:
    sd.init(0)
except Exception as e: 
    print ("Exception SDCard init: %s " % (e)) 
    
try:
    uos.mount(sd, '/sd')

except Exception as e: 
    print ("Exception SDCard mount: %s " % (e)) 
    
try:
    sd.deinit()

except Exception as e: 
    print ("Exception SDCard deinit: %s " % (e)) 
    
try:
    uos.unmount('/sd')
except Exception as e: 
    print ("Exception SDCard unmount: %s " % (e)) 

Soft resetting the LoPy
/Users/danicampora/Code/Pycom/esp-idf/components/freertos/./queue.c:1444 (xQueueGenericReceive)- assert failed!
abort() was called at PC 0x40085415
Guru Meditation Error: Core 0 panic'ed (abort)

Backtrace: 0x40008155:0x3ffc5950 0x40007d16:0x3ffc5970 0x40124f8d:0x3ffc59b0 0x4019e5e8:0x3ffc59e0 0x40197e68:0x3ffc5a00 0x4019825a:0x3ffc5a50 0x400e0c84:0x3ffc5a80 0x400df72a:0x3ffc5ad0 0x400f3272:0x3ffc5b10 0x400eb028:0x3ffc5b30 0x400f6ae8:0x3ffc5b50 0x400eeace:0x3ffc5bf0 0x400eb028:0x3ffc5c30 0x400eb055:0x3ffc5c50 0x400d8b99:0x3ffc5c70 0x400d8d07:0x3ffc5d10 0x400d7ee5:0x3ffc5d40

================= CORE DUMP START =================
4CQAAAwAAABsAQAA
aD38P5BY/D/QXvw/
oFf8P3Be/D+oGwAAbDr8P2w6/D9oPfw/ZDr8PxQAAACg8Pw/oPD8P2g9/D8AAAAA
BQAAANQ+/D9NaWNyb1B5AAAAAAAAAAAAAAAAANBe/D8AAAAAIQAGAAUAAAABAAAA
AAAAAHRm/D8AAAAAAAAAAAAAAAB43/w/4N/8P0jg/D8AAAAAAAAAAAEAAAAAAAAA

Sender with earlier Version of firmware(1.6.0.b1)

 from network import LoRa
 import socket
 import machine
 import time
 import pycom

pycom.rgbled(0x7f0000) # red 

#initialize LoRa in LORA mode
lora = LoRa(mode=LoRa.LORA, frequency=863000000, power_mode=LoRa.ALWAYS_ON, tx_power=14, bandwidth=LoRa.BW_250KHZ, sf=7, preamble=8,
coding_rate=LoRa.CODING_4_5, tx_iq=False, rx_iq=False)

#create a raw LoRa socket
s = socket.socket(socket.AF_LORA, socket.SOCK_RAW)

while True:

# send data To Green
s.setblocking(True)
s.send('Hello green')

# get any data received...
s.setblocking(False)
data = s.recv(64)
print(data)

# send Hello green once / 4 sec
time.sleep(4)

Receiver With version 1.6.5.b1

 from network import LoRa
 import socket
 import machine
 import time
 import pycom

pycom.rgbled(0x007f00) # green

#initialize LoRa in LORA mode
lora = LoRa(mode=LoRa.LORA, frequency=863000000, power_mode=LoRa.ALWAYS_ON, tx_power=14, bandwidth=LoRa.BW_250KHZ, sf=7, preamble=8,
coding_rate=LoRa.CODING_4_5, tx_iq=False, rx_iq=False)

#create a raw LoRa socket
s = socket.socket(socket.AF_LORA, socket.SOCK_RAW)

while True:

# get any data received...
s.setblocking(False)
data = s.recv(64)
print(data)

# get data from lora every sec. 
time.sleep(1)

Sender = Red firmware = 1.6.0.b1
Receiver = Green firmware 1.6.5.b1
I'm expected data from Red every 4 seconds but nothing received on Green empty buffer.

I swapped the software

Sender = Red firmware = 1.6.5.b1
Receiver = Green firmware 1.6.0.b1
I received data from Red but sometimes i missed data not receiving every 4 sec but 8 sec 12 sec etc.

I think there is something wrong with the Lora.Init parameters there is something chanced since release 1.6.4.b1

Please Help me to find the solution

Hello,

What is Happened with Lora in Release 1.6.5.b1 and 1.6.4.b1
I have a Working program that works in the previous versions.
Now it send data but I have a lot of missing massages.

I have Two LOPY boards with Extension Board. one with the latest version 1.6.5.b1 and one with version 1.6.0.b1 the newest firmware version missed a lot of messages

import machine
import socket
import time
import binascii
import pycom

from network import LoRa

print("Initializing LoRa module...")

lora = LoRa(mode=LoRa.LORA,
frequency=868100000,
tx_power=14,
bandwidth=LoRa.BW_125KHZ,
sf=7,
coding_rate=LoRa.CODING_4_5,
power_mode=LoRa.TX_ONLY)

lora_sock = socket.socket(socket.AF_LORA, socket.SOCK_RAW)
lora_sock.setblocking(False)

print("Ready to send data...")

msg_elements = [0xff, 0xff, 0x00, 0x00, 75, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00, 0x00]

msg = bytearray(msg_elements)

while (True):
lora_sock.send(msg)
print("Sent: ", binascii.hexlify(msg, ' '))
time.sleep(4)

I have stripped my software, above is working and give the same problem.
why is above working with previous firmware versions and not with the newest version(1.6.4.b1 & 1.6.5.B1)?

Following:

import machine
import os
import pycom

pycom.heartbeat(True)

uart = machine.UART(0, 115200) # disable these two lines if you don't want serial access
os.dupterm(uart)

from network import WLAN
wl = WLAN()

#trying to change AP properties:

original_ssid = "MyNode"
wl.ssid(original_ssid)

original_auth = (3,'bewell')

wl.init(mode=WLAN.AP, ssid=original_ssid, auth=original_auth, channel=6, antenna=WLAN.INT_ANT)

Does not change SSID visible on my iphone.
It remains wipy-wlan-xxx
Am I doing something wrong?

Or SSID is hardcoded regardless of what says in documentation:

"wlan.ssid([ssid])
Get or set the SSID when in AP mode.