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    • P

      New v3.1 Expansion Board Firmware: v0.0.11
      Announcements & News • firmware expansionboard update • • Paul Thornton  

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      v0.0.11 will lock your Expansion Board in DFU mode. Goodbye serial console. https://forum.pycom.io/topic/4684/exit-from-dfu-mode/13
    • W

      Best power source for using 5V sensors
      Expansion Board • expansion board i2c battery expansionboard levelshifter • • weingami  

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      @weingami Note that I2C level shifting is particularly easy as it uses an open drain-pullup signaling scheme. Shifting can simply be done with two FETs: https://electronics.stackexchange.com/questions/255607/i2c-level-shifting-mosfet
    • G

      pycoproc.py and Expansion board 3
      Expansion Board • lopy4 deepsleep expansionboard pycoproc.py • • Giorgio  

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      @Giorgio Did you find out how? I have the same problem here, using a gPy+Expansion Board V3.1. I can't find a way to put the board in deepsleep mode. It is currently using 14mA. I can only find documentation for Pysense/Pytrack/DSboard, etc.. but nothing for the Expansion Board!? :\ Where's the info I am missing? Fakstory
    • C

      Well that sucks....
      Expansion Board • usb expansionboard • • cmisztur  

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      @robert-hh Eh yeah, I'll give that a shot.
    • robert-hh

      Pinout documentation for development modules
      Discussion • fipy expansionboard rts cts devmodules • • robert-hh  

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      @Paul-Thornton What is the answer to his question though? I too am very confused by the documentation for the Fipy and expansion boards. There is conflicting or outdated information regarding the expansion board v2.0 and v3.0. Often I don't know which is being referred to, and worse, Pycom's channel resellers like Mouser, Digikey, etc. often mix them up.
    • S

      i2c device Wiring on Expansion Board & WiPy 3.0
      Expansion Board • i2c wipy3.0 expansionboard • • svonbentzel  

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      @eric-waai Yes it was a typo I have 3 i2c devices
    • V

      Cannot switch LoPy4 to download mode with Expansion Board 3.0 on Windows10
      Discussion • lopy4 expansionboard esptool • • Verkehrsrot  

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      robert-hh

      @verkehrsrot Sorry, I do not know a documentation of the Pycom method. I also do not expect that the Pycom method will be implemented by esptool.py, since almost every other ESP32 board maker implements the DTR/RTS method.
    • N

      FTP access, device is seen but doesn't asnwer.
      FiPy • fipy usb expansionboard ftp filezilla • • NickBoots  

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      @NickBoots , If you are connecting to an Access point from your pycom device (i.e Wifi in STA mode) disable the wifi on boot option via this command pycom.wifi_on_boot(False) reset board and try again.
    • V

      Schematic?
      Ideas • expansionboard • • vern.muhr  

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      livius

      @robert-hh yes, new chips are really interesting. Reading draft version of docs are promising. As they send some testing parts already i suppose full delivery and final version of docs will be really soon. I am really interested if ADC will be better in new chips ;-)
    • M

      Expansion board 3.0 battery power not enough juice?
      Expansion Board • expansionboard • • macbum  

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      @wolli01 Yes, I can remove the cable when the Lopy is charge by Lipo after starting. When USB connected, I remove the cable but it's not necessary. I updated Lopy with the new firmware and no change. It's work only with the jumper cable connected when the expension board and lopy start. Maybe on other people have an idea ?
    • W

      How to connect external power through the BQ24040 battery charger IC on the Expansion Board 2.1
      Comments & Feedback • battery expansionboard solar bq24040 • • wgtthompson  

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    • R

      Lopy with a hc-sr04 endless loop
      LoPy • lopy expansionboard hc-sr04 • • rootmi  

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      @rootmi I’m no electronics expert and I don’t know the full specs of the sensor, but I’m not sure I understand how those two resistors would be enough. You are still powering a 5V device with 3.3V and sending it a 3.3V signal, aren’t you?
    • B

      Expansion Board Suggestions
      Expansion Board • pytrack expansionboard battery monitor features suggestions • • brotherdust  

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      Charly86

      @brotherdust any chance you share the pin pad mapping on the bottom (at least RX/TX) ?
    • DDecoene

      Can you use Pin.callback(...) to invoke deepsleep.go_to_sleep(...)?
      SiPy • sipy deepsleep expansionboard callback • • DDecoene  

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      DDecoene

      Hello, Thank you for pointing that out. I changed the pins to G30 (sleep) and G13 (wakeup) and now the system works fine. So, the new code is: from machine import Pin, Timer from deepsleep import DeepSleep import deepsleep def handler(button): ds.enable_pullups('G31') # can also do ds.enable_pullups(['P17', 'P18']) ds.enable_wake_on_fall('G31') # can also do ds.enable_wake_on_fall(['P17', 'P18']) print("Button pushed") ds.go_to_sleep(20) ds = DeepSleep() # get the wake reason and the value of the pins during wake up wake_s = ds.get_wake_status() print(wake_s) if wake_s['wake'] == deepsleep.PIN_WAKE: print("Pin wake up") elif wake_s['wake'] == deepsleep.TIMER_WAKE: print("Timer wake up") else: # deepsleep.POWER_ON_WAKE: print("Power ON reset") button=Pin("G30",Pin.IN, pull=Pin.PULL_UP) irq=button.callback(trigger=button.IRQ_FALLING, handler=handler) print('booted---')
    • Lokefar

      LoPy+Expansion board+Deep Sleep Shield only down to 18mA
      LoPy • lopy deep sleep expansionboard lopy current • • Lokefar  

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      @ledbelly2142 Hi ledbelly2142 I am doing a project with the same devices as you. I am a begineer of IoT and it seems I can learn something from your experience. May you share the whole code you have done of this deep sleep shield connected with LoRa, if you still have it. Thanks in advance! Regards Rachel
    • T

      Using Wipy 2.0 Without expansion Board
      WiPy 2&3 • wipy2.0 expansionboard • • Tomjuarez  

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      bucknall

      @Xykon @Tomjuarez Please remember to check the voltage of the FTDI cable. It states that it is 3v3 but the VCC pin is actually at 5 V, confusingly! I have made this mistake and it may destroy your device! Thanks! Alex
    • A

      A million issues getting started
      WiPy 2&3 • wipy2.0 expansionboard • • AustinBeau  

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      livius

      @AustinBeau yes i wrote this line from memory - fixed in post, thanks :) IP is 192.168.4.1 and rest default www.pycom.io and then micro python like here https://docs.pycom.io/pycom_esp32/pycom_esp32/getstarted.html#initial-configuration-atom
    • H

      Cannot connect to WiPy 2.0 via USB
      WiPy 2&3 • wipy2.0 usb expansionboard • • h3rald  

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      Solved! These are the right drivers to install! http://www.ftdichip.com/Drivers/D2XX.htm
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