LoPy

• T

  any example on modbus with BLE
  • theshade  

  1
  0
  Votes
  1
  Posts
  152
  Views

  No one has replied

• G

  LoPy to LoPy over WIFI, socket Exception <class 'OSError'> -1
  lopy lopy4 wifi oserror wifi send data • • goro  

  3
  0
  Votes
  3
  Posts
  283
  Views

  G

  Indeed we have the "socket.accept ()" method in the first LoPy, but the problem was in the pointing address to the other LoPy which was wrong. It's already solved, thank you!
• J

  Has anyone successfully used lora.nvram_save() and restore?
  lopy lora nvram • • jalperin  

  17
  0
  Votes
  17
  Posts
  4909
  Views

  B

  @jcaron The issue has been worked out and it works quite well now! Thanks a lot!
• R

  Receiving b"
  lopy lopy lora mode • • rajarahul96  

  6
  0
  Votes
  6
  Posts
  1389
  Views

  T

  I am seeing a similar issue with my FiPy device (when using NB-IOT communications). I suspect the problem has something to do with the sockets code and not specifically LoRa. I am running the latest version of software on my FiPy.
• 

  Loraserver.io & Pycom Source Code
  loraserver.io • • ahaw021  

  13
  0
  Votes
  13
  Posts
  3176
  Views

  D

  I'm trying to use nano-gateway with loraserver.io but I can not downstream messages just upstream. Can you share if you had the same problem?
• S

  OTAA over nanagateway to brocaar loraserver
  otaa nanogateway loraserver • • ssetu  

  4
  0
  Votes
  4
  Posts
  1375
  Views

  D

  I'm trying to use nano-gateway with loraserver.io but I can not downstream messages just upstream. Can you share if you had the same problem?
• T

  Lopy LORAWAN/LORA standalone gateway
  lopy lora lorawan gateway raspberry pi • • thomand1000  

  12
  0
  Votes
  12
  Posts
  3989
  Views

  D

  I'm trying to use nano-gateway with loraserver.io but I can not downstream messages just upstream. Can you share if you had the same problem?
• 1

  Anyone can connect nano-gateway to their own server?
  lopy nano gateway server client • • 150716T  

  4
  0
  Votes
  4
  Posts
  1079
  Views

  D

  I'm trying to use nano-gateway with loraserver.io but I can not downstream messages just upstream. Can you share if you had the same problem?
• B

  Downlink timestamp error!
  lora uplink message nanogateway ti • • brunoS  

  2
  0
  Votes
  2
  Posts
  885
  Views

  D

  I have exactly the same behavior you describe. Downlink do not get messages. Could you find a solution?
• K

  lopy4 set to send on one frequency, but gateway receives the packet on a different frequency
  • kylecjo  

  5
  0
  Votes
  5
  Posts
  383
  Views

  K

  I switched the code on the gateway to the single channel version and TTN shows an output as intended. You are probably correct about the chip getting confused about which channel it is listening on. Thank you!
• G

  lopy4 on 470-510/433 MHz
  • goldfishalpha  

  3
  0
  Votes
  3
  Posts
  225
  Views

  

  @goldfishalpha It is possible, and not too complicated. You have to to a few changes to modlora.c, application.mk and a few of the region specific files, mostly along what is present for e.g. region EU868. But you would have to maintain that every time that the firmware is changed.
• W

  At high voltages the Lopy does not transmit any more?
  lopy wipy lorawan bluetooth battery • • Wolli01  

  6
  0
  Votes
  6
  Posts
  453
  Views

  

  @Wolli01 Both SX1272 and SX1276 oprate at a range of 1.8 to 3.7 V, the esp32 at a range of 2.6 to 2.6 V. So 3.33V should not be a problem. The voltage should however be taken at the 3.3 V output of the LoPy, to be sure, that the supply arrives. But there may be short supply drops during send bursts. If you have an oscilloscope available, try to trigger for voltage drop sat the 3.3V output. The current demand for WiFI is higher than that for Lora, 250mA worst case for the ESP32 vs. 120mA worst case for the SX127x, but I doubt that these high power output modes for Lora are supported. So yes, worst case can be in the range of 500mA. Given your power consumption, battery impedance, especially at low voltage, may more be an issue than total capacity.
• I

  I am getting an 'AttributeError: 'ADC' object has no attribute 'vref_to_pin()'' error when I try to use the ADC library in micropython on a lopy4
  • ionhedes  

  2
  0
  Votes
  2
  Posts
  204
  Views

  E

  i think the function does not return any thing. it just connects the internal 1,1 V to a pin so voltage does not become anything. what software version are you running. if i run adc.vref_to_pin('P22') i get nothing if i run voltage = adc.vref_to_pin('P22') print (voltage) i get None
• B

  LoRa mesh missing on Lopy4?
  • Belbs  

  5
  0
  Votes
  5
  Posts
  521
  Views

  T

  It's a little odd that the LoPy includes the mesh functionality but the LoPy4 doesn't in rc8. I would have expected it to be the other way around based on the increased memory capacity on the LoPy4. Will there be build options available via the firmware update tool to include mesh or not for all supported devices? Thanks Andrew
• A

  Machine.reset_cause()
  • Asb  

  2
  0
  Votes
  2
  Posts
  166
  Views

  

  @asb No, because the reset pin, connected to CHIP_PU on the ESP32, actually switches the power. That is in the data sheet: CHIP_PU High: On; enables the chip Low: Off; the chip powers off
• H

  This topic is deleted!
  • Harrymeco  

  1
  0
  Votes
  1
  Posts
  3
  Views

  No one has replied

• D

  Lopy to Lopy communication over LoRa hangs on send
  • dmcwright  

  10
  0
  Votes
  10
  Posts
  762
  Views

  D

  @kps Thanks for the help. It 'almost' worked. It sent the first "ping" successfully, then printed "sending ping" and was never heard from again. If I use the reset button on the LoPy4 to get back to REPL and try to run the same code again from Atom, then the code won't send even that one ping. However, if I power-cycle the unit and run the same code from Atom again, then it completes the send command successfully exactly once before it hangs on the second send. Could this behavior be a clue? Why does the "hard" reset matter?
• C

  How can I send MAC Commands and receive the MAC answer?
  lorawan • • cp-boettch  

  6
  1
  Votes
  6
  Posts
  861
  Views

  E

  @goldfishalpha LinkADRReq is only send by a lorawan base station/gateway . Pycom device as only a device stack not a gateway one. So a pycom device can only process received LinkADRReq if you have the correct setting in lora constructor from documentation, set adr to true and the gateway will send you Linkadrreq IF needed by link quality transmission lora.init(mode, * ,region=LoRa.EU868, frequency=868000000, tx_power=14, bandwidth=LoRa.BW_125KHZ, sf=7, preamble=8, coding_rate=LoRa.CODING_4_5, power_mode=LoRa.ALWAYS_ON, tx_iq=False, rx_iq=False, adr=True, public=True, tx_retries=1, device_class=LoRa.CLASS_A)
• X

  LoPy4 BLE server
  lopy4 ble lopy ble gatt lopy ble service ble receive dat • • xSKlero  

  4
  0
  Votes
  4
  Posts
  456
  Views

  J

  @xsklero There's an example of a BLE server here: https://docs.pycom.io/firmwareapi/pycom/network/bluetooth/gattscharacteristic.html Whatever you try, if you have an issue, you need to be more specific. Tell us what code you are using and the exact issue you are facing.
• C

  Test program doesn't work on my Lopy4
  • Caroline  

  2
  0
  Votes
  2
  Posts
  213
  Views

  E

  @caroline It's simple, just change one line of your code def pin_handler(arg): global bouton_appuyer bouton_appuyer=bouton_appuyer+1