LoPy

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  LoPy connects to TheThingsNetwork but payload is empty
  lopy ttn otaa thethingsnetwor • • philwilkinson  

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  @philwilkinson For readable data you could also use: data = "%.2f" % si.temperature() and use float(recv_data) for back-conversion.
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  LoPy4 433Mhz
  lopy4 433mhz • • colinza  

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  @bmarkus Hello Bèla. I now tested OTAA join. Due to the timing jitter of the gateway, I wanted to use RX2 for the join response. So Ive set that in the device parameters of the Loriot server. But that did not work. The join response appeared in the RX1 window. Did I expected something wrong from the settings, or just looked at the wrong place? P.S.: After a few attempts, join also worked at the RX1 window.
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  Pin mapping for SPI / I2C connection to Cinterion TC65T module
  lopy4 i2c spi tc65t • • Verkehrsrot  

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  [(not)Solved] LoRa timing of LoPy and FiPy
  lopy fipy lora lopy4 timing • • robert-hh  

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  @sympatron ACK, so my tendency is to close that attempt.
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  Correct UART pins and problems
  lopy4 expansion board uart serial honeywell • • hopkapi  

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  @hopkapi If you connect G24 aka P3 -> 7 G11 aka P4 -> 6 GND -> 8 GND Vin -> 2 (5V) and run the LoPy from USB. then the electrical conditions shoul be OK, and the device shoudl be accessible via UART 1. SOmetimes the definition of Tx and Rx are reversed, so you may swap P3 and P4. That should not cause any harm to the devices. The UART setting according to the data sheet is baud rate: 9600, databits: 8, stopbits: 1, parity: no Some test code would be like: from machine import UART uart = UART(1, 9600) # init with given baudrate uart.init(9600, bits=8, parity=None, stop=1) # init with given parameters while True: data = uart.readall() if data is not None: print(data)
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  Snail mail detection via LoRaWAN
  lopy lora • • zappfinger  

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  @philwilkinson Thanks Phil, it was a fun project and something I wanted to try for a long time. I will share the code in a moment. The communication between the 2 LoPy's is based on the 'ping-pong' example, although some messages were added. The 'mailServer.py' is the code running in the mailbox. The 'mailClient.py' is the client running in my home. When the client starts it does a getStatus() to get the status from the server ('mail'/'no mail': it could be that mail came in when the client was not running). Then it sends a reset command so the mailServer resets ( so I do not have to power down the server each time mail was detected) Every minute the getStatus() is also executed. In fact getStatus() tries 3 times to get the status. If that does not succeed, I assume the battery is dead and the clients LED turns red. It turns green when getStatus() succeeds, but there is no mail, blue when mail was detected. My next step is to connect the client to my Wifi network also (via a socket or so), allowing me to send an email when snail mail came in or the battery is dead... To answer your questions, it uses the LoRa protocol. I estimate the distance to be 50 to 70 meters, but with a lot of concrete and a steel elevator in between. The antenna wire is now in a sleeve in the mail box door, because vandals stripped the antenna twice. 1_1531328973387_mailClient.py 0_1531328973387_mailServer.py It seems to work well, especially with these settings for tx_power and sf: lora = LoRa(mode=LoRa.LORA, frequency=863000000, tx_power=14, sf=7)
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  Micropython Counter
  lopy4 sd card data counting • • Justin_Dylan  

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  Python code without proper indentation is not very useful. You should try to put it inside a code block like this: import time import machine from machine import Pin tip_num = 0 tip = (Pin('P10', mode=Pin.IN, pull=Pin.PULL_UP)) tip([1]) while tip !="": tip_num += 1 tip_value = (tip) total += tip_value tip = (Pin('P10', mode=Pin.IN, pull=Pin.PULL_UP)) print("Counter", tip_num) print("Done") Apart from that there are a lot of mistakes (e.g. tip([1])) and redundancies (e.g. wrapping everything in parenthesis) in your code. You should probably read the the MicroPython and Pin documentation first.
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  Unable to boot when on breadboard (LoPy)
  freeze boot mode not started not booting • • emil-jacero  

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  Nano-gateway and Node
  lopy lora lorawan otaa nano gateway • • tealbrains  

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  @robert-hh To be more precise, it is in branch nanogateway at the URL: https://github.com/robert-hh/pycom-libraries/blob/master/examples/lorawan-nano-gateway/nanogateway.py
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  lorawan nano Gateway Program
  lopy4 lopy lorawan lopy lora lorawan nano gw tutorial • • Harish kumar  

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  @robert-hh Thanks for your reply. Yeah exactly I am talking about repeater. Just let me know once they develop this part. Till then I will try to do by myself.
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  Changing address in pymakr.conf has no effect
  changes pymakr address • • zappfinger  

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  Hi @zappfinger, Which version of Atom and Pymakr do you have? I have just tried using 2 LoPys and changing the address in the config file, it worked fine for me.
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  LoRa code organisation, extending to EU433
  lora eu433 code organisati • • robert-hh  

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  I2C bus error pytrack read_battery_voltage()
  i2c bus error • • chvl  

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  @chvl I have the same issue with bus errors on battery read so I use a 'try' 'except' to catch the error and I limit my battery check to something reasonable - like every 10 minutes eg: batt_check_interval = 600 # check the battery voltage every 10 minutes def readBattery(): global vBatt global last_batt_check global batt_check_interval if(utime.time() - last_batt_check > batt_check_interval): try: vBatt = pytrack.read_battery_voltage() # keep track of time since last battery check last_batt_check = utime.time() print ('Battery read: ' + str(vBatt)) if (vBatt < lowBatt): # do more here print ('Battery voltage: LOW') except Exception as e: print ('Battery read: ERROR') return return
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  Can anyone help me get started with a gps tracker
  lopy lora gps • • james.matthews  

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  @james-matthews I've experimented with a lopy (lora via the things network) and sipy (sigfox). Lora via TTN is not yet very well covered in my region (Belgium) Sigfox coverage is much better. But you need to check on there site to see if you region is covered. The pytrack module does it job mostly giving me a decent resolution. I had the sigfox running on a 2 amp lipo battery for over 2 months, waking up every hour. in my experience, the pytrack has problems getting a fix in a moving car. Sigfox is free the first year you sign up. Commercial lora providers can be expensive, and almost always orientated to commercial customers (meaning people who buy lots of devices). Andre
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  LoPy + GSM / GPRS SIM900 modification Nanogateway LoRaWAN
  lopy at commands lorawan abp gprs • • juan.narvaezb95  

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  Set TX Power in LoRaWAN Mode
  lopy lorawan txpower • • timrid  

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  @dan Well, don't understand why it is like that. Due to a research project I have had to "hack" the libraries to allow changing the transmission power. Should anyone need it, send me a PM (I have just programmed a "dirty" workaround so not even daring to push a change to github or something like that!)
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  Comipling error
  lopy lopy4 error compile • • Harish kumar  

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  @harish-kumar Did you follow the guide at https://docs.pycom.io/chapter/pymakr/installation/atom.html
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  Bluetooth on Lopy4 doesn't detect any device
  lopy4 bluetooth scan • • AlejandroReyes  

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  Hi @AlejandroReyes, I've just tried this code and managed to find my BT headphones with it. The issue could be that your devices don't use BLE, so the LoPy board couldn't find them. Currently, only BLE is supported. You can find more on this on the Bluetooth docs page. Let me know if this helped!
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  Is it possible to update time using Lora Otaa?
  lopy otaa rtc synchronize • • jclo13  

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  @charly86 thank you, I will try it
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  To send data to cloud via lorawan instead of using wifi.
  lopy lorawan lopy wifi lopy nanogatewa • • Harish kumar  

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  @harish-kumar said in To send data to cloud via lorawan instead of using wifi.: Hello everyone, I am using Lopy, I am new to this. I need to send some data to cloud via Lorawan instead of using wifi. Is it possible ? If it is , can anyone say me the procedures ? First check whether LoRaWAN is good for your application, it depends on the volume of data you are transmitting, what is the latency your application can accept, etc. Provide details. If it fits to your use case from networking view we can discuss how to implement.