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    • G

      Lipo Battery reference
      Expansion Board • gpy expansion board power lipo battery • • GeorgeEisin  

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      G

      @seb Thanks a lot for quick response!
    • R

      Unable to mound SD Card
      LoPy • lopy expansion board sd card • • Robin  

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      E

      @Robin did you fix it?, I am trying to do the sema thing continuous mounting and resettind the SD Card. and sometimes I get the error: OSError: the requested operation is not possible, when i use "sd = SD()". and when I use "os.fsformat('/sd')" the program stop and I can only run again when I use the push button reset.
    • iber

      Deepsleep with Lopy4 on expansionboard
      Comments & Feedback • lopy4 expansion board deepsleep • • iber  

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      livius

      @iber Just for the info if you need some details https://forum.pycom.io/topic/1022/root-causes-of-high-deep-sleep-current
    • A

      Starting with LoPy
      Discussion • lopy expansion board upload failure • • aimette  

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      robert-hh

      @aimette You can set up your own firmware build environment from the repository at https://github.com/pycom/pycom-micropython-sigfox, which in addition to changing the frequency allows you to embed your Python code into the flash, if it solid.
    • R

      SD card not recognized in expansion board with LoPy and deepsleep shield
      Expansion Board • lopy expansion board sd card • • Robin  

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      jmarcelino

      @robin UART0 is a bit special - need to look into that myself - but you can easily redefine the UART1 pins (and UART2 unless on the GPy/FiPy)
    • megabyte

      Required pin connections for programming LoPy/SiPy/WiPy
      Expansion Board • expansion board uart programming sty • • megabyte  

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      megabyte

      @robert-hh Thanks for the detailed reply and clarifying that it's DTR and RTS!
    • T

      Need Expansion Board to run?
      Expansion Board • sipy expansion board deep sleep • • Toppert  

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      T

      It is indeed mentioned in this post. So I'll be able to get rid of the expansion board but not the deep sleep shield for it to be fully efficient That's exactly what I was thinking but I wanted to be sure about especially about the current since it worked but I was sure there will still be current consumption problems without the shield. Thank you for your fast reply, this will reduce the size of my project.
    • L

      I2C at expansion board
      Expansion Board • lopy expansion board i2c • • Lopyusr  

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      ledbelly2142

      @lopyusr I apologize, I misunderstood. I provided too much info on something not your issue. I'm assuming you are using this driver and example: HERE And documentation HERE
    • B

      DeepSleep Still Randomly Ending
      SiPy • sipy expansion board deepsleep • • bradnz  

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      @bradnz Exactly which version of deepsleep.py did you use? There are many commits which mention version 1.0.0 for this file. I am trying your solution, but it's not working for me on LoPy.
    • W

      How connect Expansion Board with Pysense
      Issues & Bugs • lopy pysense expansion board • • wink624  

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      Yes, of course, i have level coverter from 5 to 3,3V, so solution: using pin 9 and 10 for SD card and pins 5,6,7,8 can be used as UART RX/TX. following my code implementation?
    • A

      [SOLVED] broken Pysense board?
      Expansion Board • pysense expansion board i2c error wipy2 • • andrethemac  

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      A

      @jorismathijssen Hi Joris. Did you tried tot upload thé firmware again? Be sure to powercycle your device. Did you run dfu utils with elevated rights? (Admin on Windows of sudoku on Linux?) Good luck
    • M

      Upload Libraries
      Comments & Feedback • lopy pytrack expansion board • • MJ  

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      RobTuDelft

      @mj If you are familiar with Python: when you import functionality (with the import statement), from another file (known as a module), you don't have to specify the exact path of the module. The Python run-time will actually look for the imported file in the paths as specified by sys.path. Be sure to read this as it might be helpful for you.
    • G

      Connecting GPS antenna and a DHT22 to my expansion board2.0/LoPy?
      Expansion Board • lopy pytrack expansion board gps dht22 • • Gmaitre  

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      robert-hh

      @gmaitre The 3.3 V output can supply up to 1 A current, so supplying a DHT22 and GPS module should not be a problem. The PyTrack board has an additional connector on the bottom, with some GPIO pins exposed, for instance P10 (G17) and P11 (G22). These could be used to connect the DHT22.
    • K

      Wipy 2.0 machine.reset() failing
      WiPy 2&3 • expansion board wipy 2.0 debug machine.reset • • KevinGrumble  

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    • K

      temerature sensor for Wipy 2.0 w/ext. board
      WiPy 2&3 • wipy expansion board sensors temperature • • kop524  

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      livius

      @kop524 said in temerature sensor for Wipy 2.0 w/ext. board: As near all pins can be redirected then choose is quite simple i only ommit for sensors pins used for SD card communication and sometimes inputonly look at https://docs.pycom.io/chapter/datasheets/ there are good descriptions about pins - you must choose self.
    • B

      Charging from Solar via the Expansion Board
      Expansion Board • expansion board solar panel • • bradnz  

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      A

      @maamar i've a strange behaviour: main.py from pysense import Pysense from MPL3115A2 import MPL3115A2 from SI7006A20 import SI7006A20 from LTR329ALS01 import LTR329ALS01 from network import Sigfox import socket import time import struct import network wlan = network.WLAN(); wlan.deinit(); while True: py = Pysense(); mp = MPL3115A2(); si = SI7006A20(); lt = LTR329ALS01(); sigfox = Sigfox(mode=Sigfox.SIGFOX, rcz=Sigfox.RCZ1); #temperature -10000 - 10000 temp = int(round(si.temperature()*100,2)); #humidity 10000 - 0 hum = int(round(si.humidity()*100,0)); #pressure -13000 - 8560 pres = int(round(mp.pressure(),0))-100000; #blue light blue = lt.light()[0]; #red light red = lt.light()[1]; #message message = bytes(struct.pack('>hhhhh',temp,hum,pres,blue,red)); s = socket.socket(socket.AF_SIGFOX, socket.SOCK_RAW); s.setblocking(True); s.setsockopt(socket.SOL_SIGFOX, socket.SO_RX, False); s.send(message); s.close(); py.setup_sleep(60); py.go_to_sleep(); If i supply the pysense by usb all works fine, but if i supply it by 5V and GND (first and second pin on the top rigth corner) the Sipy sends only one message. Do you have any suggestions?
    • F

      LoPy - Running On Battery Information
      LoPy • lopy expansion board battery • • fuzzy  

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    • B

      DeepSleep Shield
      Comments & Feedback • expansion board deepsleep • • bradnz  

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      @ledbelly2142 I just tested this. I have a LoPy on a 18650 battery (via an expansion board), with a current shunt inline to monitor battery current. Control test: Without DeepSleep shield: While connected to USB, I observed charging current going into the battery. If I unplug the USB, then the battery discharges: 100mA for active Wifi, 35mA w/o Wifi, and 10mA for disabled WiFi and machine.deepsleep() With DeepSleep shield: Using the "deepsleep" library with the DeepSleep shield, and connected via USB, I put the device to sleep. The charging current for the battery was unchanged. I then disconnected the USB, and the current draw from the battery dropped below 1mA. I can't measure much lower than that with my setup. Conclusion: The DeepSleep board works as expected with batteries.
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