LoPy

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  Connecting and Sending PyCom LoPy 4 Data to a Server
  lopy pycom server send data data lopy • • letsgo  

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  D not forget LoRa as an option if it is a LoPy 4 device.
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  ModBus library on LoPy : no data received from slave
  lopy modbus • • SameerChouksey  

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  Hello, I'm working on a modbus project using the pycom controller to read a few input registers. But there I get the same error as you Sameer and I'm not able to make the code run correctly. What did you do that the code work? Regards, Jan current code: ######################### RTU SERIAL MODBUS ######################### uart_id = 0x01 modbus_obj = Serial(uart_id, pins=('P3', 'P4')) ###################### READ INPUT REGISTERS ################## slave_addr=0x01 starting_address=0x04 register_quantity=2 signed=True register_value = modbus_obj.read_input_registers(slave_addr, starting_address, register_quantity, signed) print('Input register value: ' + ' '.join('{:d}'.format(x) for x in register_value))
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  Identity in WPA2_ENT
  lopy connection wpa2 enterpise • • fasih011  

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  Hi @fasih011, The identity is needed by the server. If it's not configured on the server, just set it to some dummy string, but some value is still needed. Otherwise, you'd have to check/get the identity from the network server.
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  value of tx_time_on_air of the lora.stats() function
  lopy timeonair lora.stats • • imasd  

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  @braulio The time on air changes with the data rate. And for larger distances, the sending device may be set for lower data rates. But that does not happen by itself.
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  Library for Sensirion SHT1x SHT7x
  lopy library sht1x sht7x • • Dragosh  

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  30uA and LoRaWAN
  low power • • marcozennaro  

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  @beyonlo said in 30uA and LoRaWAN: @marcozennaro said in 30uA and LoRaWAN: @malachib it is just sending. As I use ABP I don't have to wait for an acknowledge from the gateway. Using ABP do not means that node will not waiting for a possible ACK from the Gateway. Both, ABP and OTAA always waiting a time (are two DOWNLINK slot times) after sending data, for a possible ACK from the gateway, that is standard. The difference is that OTAA needs an authentication (that will use a DOWNLINK too) before to sent any data, ABP doens't. You are missing different things. First, Gateway never send ACK, it is done by the LoRaWAN Network Server when requested by the device. ABP and OTAA are activation modes and handling encryption keys. ABP itself doesn't generate any air traffic, keys exchanged out of LoRaWAN. OTAA is a way to generate keys but it has nothing to do with authentication. Whether node will wait for downlink and when is independent of activation mode, it depends on Devics Class 'A' or 'C', 'B' is not supported by PyCom and most of other devices.
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  This topic is deleted!
  • JamPal  

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  LoPy to RN2903
  lopy lora rn2483 rn2903 • • Burgeh  

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  @burgeh It is definitely possible, if you use raw LoRa mode. The simple expamples from the docs would serve for LoPy. I do not know how you want to drive the RN2903.
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  LoPy and MAX6675 SPI Thermocouple
  spi max6675 • • alessio_ultrafab  

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  It is hard to determine the quality of thermocouples purchased via Ebay/Amazon. It may be a great sensor, however if you need something of quality and accuracy – or even just general information, just go to [www.pyrosales.com.au](link url) CEO John S
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  LoRa Thread expectations
  lora thread low power mesh network • • malachib  

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  Downlink to Lopy
  lopy4 lorawan otaa lorawan otaa downlink • • Harish kumar  

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  @harish-kumar Is it a 'Class-A' device? RX window timing can be an issue.
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  PySense not working with LoPy4
  lopy4 pysense • • thinginnovations  

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  Looks like I got it working, seems atom and pymkr plugin were not looking for the plugged in port, rather the one that was used first. Found option in the settings to get the port automatically. Andrew
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  ValueError: invalid join data rate 3 Lopy LORAWAN
  lopy lora error lora lopy data rate • • rubencg195  

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  @robert-hh There is a PR for that to fix the issue OK, thank you for the heads up
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  This topic is deleted!
  • Belkinsupport  

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  Store and forward usign SD card for lopy
  lopy sdcard store and forw • • shiva shankar  

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  @shiva-shankar There is not something like a Lora connection. You only can send messages, and if you're lucky, they arrive. At most, you can ask for confirmation when sending. But confirmation messages account for the downlink budget, and that is (intended to be) limited.
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  Many devices from one connection?
  lora lopy4 sigfox network data • • james.matthews  

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  Hi @james-matthews, Maybe a LoRa mesh network? (Note: it's still in development) What type of devices do you have?
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  LOPY4 OTA update
  lopy4 • • abhishek2101  

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  Hi @abhishek2101, You can find our tutorial for OTA here: https://docs.pycom.io/chapter/tutorials/all/ota.html
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  lora.nvram_restore() is not working
  lopy4 lorawan lorawan abp saving data restore • • Harish kumar  

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  @robert-hh Thank you so much for your time. I made some changes and now my program works fine.
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  Restarting code without reset button or power-cycle
  lopy wifi reset • • christian_kohler  

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  @robert-hh Thanks, that is perfect.
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  LoPy UART for GPS not reading data
  lopy uart gps • • johnmcdnz  

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  hi @affoltep i tried to connect a gps to my lopy4 and use your code, but it's not working.. of course the gps led is blinking and the code is running well. this is my wired setup can you help me please?