Search found 29 matches

by jwissing
Thu Jun 08, 2017 4:44 pm
Forum: ESP8266 boards
Topic: HCSR04 module usage
Replies: 3
Views: 1158

Re: HCSR04 module usage

It is the reference to the class variable TIMEOUT_US in the __init__ method.

def __init__(self, trigger_pin, echo_pin, echo_timeout_us=HCSR04.TIMEOUT_US):

Delete the class name HCSR04 from the default value.

def __init__(self, trigger_pin, echo_pin, echo_timeout_us=TIMEOUT_US):
by jwissing
Tue Apr 25, 2017 6:28 pm
Forum: General Discussion and Questions
Topic: Jupyter notebook kernel from adafruit
Replies: 2
Views: 1473

Jupyter notebook kernel from adafruit

Hi, just in case you did not notice already. Tony D. from adafruit has made a kernel wrapper for jupyter notebook that allows to interact with micropython on MCUs. I have tested so far with pyboard, esp8266 and esp32 boards. I really like it, as it allows to take notes and code and test incrementall...
by jwissing
Thu Feb 09, 2017 5:42 pm
Forum: ESP8266 boards
Topic: 1.8.7 fails to install
Replies: 17
Views: 6510

Re: 1.8.7 fails to install

I can somehow reproduce your problem when flashing with --flash_size=8m on a 4MB board.
When i flash with --flash_size=32m it is working.

Sorry i have no more ideas what could be wrong.
by jwissing
Thu Feb 09, 2017 11:53 am
Forum: ESP8266 boards
Topic: 1.8.7 fails to install
Replies: 17
Views: 6510

Re: 1.8.7 fails to install

Is it possible that erase and flash overlap?
by jwissing
Thu Feb 09, 2017 6:01 am
Forum: ESP8266 boards
Topic: 1.8.7 fails to install
Replies: 17
Views: 6510

Re: 1.8.7 fails to install

This is reproducable. After flashing without -fm dio: Fatal exception (28): epc1=0x4000228b, epc2=0x00000000, epc3=0x00000000, excvaddr=0x000000b5, depc=0x00000000 Fatal exception (28): epc1=0x4000228b, epc2=0x00000000, epc3=0x00000000, excvaddr=0x000000b5, depc=0x00000000 Fatal exception (28): epc1...
by jwissing
Wed Feb 08, 2017 5:07 pm
Forum: ESP8266 boards
Topic: 1.8.7 fails to install
Replies: 17
Views: 6510

Re: 1.8.7 fails to install

I had the same issue when trying to burn the latest firmware to a new Amica nodeMCU board.
Adding -fm dio to the write_flash did help.

Code: Select all

esptool.py --port /dev/ttyUSB0 erase_flash
esptool.py --port /dev/ttyUSB0 --baud 115200 write_flash -fm dio 0 ../esp8266-20170208-v1.8.7-205-g181f7d1.bin
by jwissing
Sun Nov 20, 2016 7:04 pm
Forum: General Discussion and Questions
Topic: Can a python script know when webrepl is open?
Replies: 5
Views: 2767

Re: Can a python script know when webrepl is open?

Hi, i'm having similar problem with a sensor board in development. I use the following approach to get into webrepl when i need to. I have connected Pin 12 to ground normally and when i need to update the board i connect the pin to high. flag = Pin(12, Pin.IN) if flag.value() == 1: print("starting w...
by jwissing
Sun May 22, 2016 10:52 am
Forum: ESP8266 boards
Topic: Progress with resolving WebREPL issues
Replies: 2
Views: 2240

Re: Progress with resolving WebREPL issues

We're having a good progress with debugging WebREPL issues, and by now fixed two issues: 1) after 5-6 WebREPL connections, a module went unstable; 2) unable to connect more than 5 times via WebREPL (these seemed to be the same issue, but turned out to be 2 separate ones). ... MicroPython v1.8-95-gb...
by jwissing
Sun May 15, 2016 7:47 am
Forum: ESP8266 boards
Topic: Reading VCC level
Replies: 2
Views: 1734

Re: Reading VCC level

I came across this topic when playing with LUA and NodeMCU.
There was a discussion in the Espressif BBS http://bbs.espressif.com/viewtopic.php? ... dd33#p2922.
Perhaps this is helpful.
by jwissing
Sat May 14, 2016 4:25 pm
Forum: ESP8266 boards
Topic: MemoryError when importing a custom module
Replies: 44
Views: 17634

Re: MemoryError when importing a custom module

I tried to rebuild and reflash everything from scratch several times but I simply get "access denied" from the webREPL every time I try to type in the webREPL password (and yet the password is the right one as I type it just before at the initialisation step). Apparently it's wrong, or you discover...