jeroennijhof / lorawan

LoRaWAN implementation in python

LoRaWAN

This is a LoRaWAN v1.0 implementation in python.

It uses https://github.com/mayeranalytics/pySX127x and it's currently being tested with a RFM95 attached to a Raspberry PI.

See: https://www.lora-alliance.org/portals/0/specs/LoRaWAN%20Specification%201R0.pdf

Installation

Just git clone and check rx_ttn.py for reading LoRaWAN messages and tx_ttn.py for sending LoRaWAN messages.

TODO

Make code more readable and easier to use

lorawan's Issues

Variable frequencies

Hi, does this implementation automatically jump between frequencies or is statically glued to 868.1? From my understanding OTAA even offers frequency suggestions by the used gateway.

Help regarding JoinAcceptPayload.py

Hi, this is a query.

Thanks for this code - very useful

I'm developing code based on https://github.com/computenodes/dragino which, in turn, is based on this work. In particular I'm trying to add MAC command handling to make the code compliant with MAC 1.0.4.

During my testing I get an Exception telling me the following:-

Attribute Error 'JoinAcceptPayload' does not have an attribute called 'payload' 

This happens when lorawan.valid_mic() is called.

The error appears to come from line 25 below

 def to_clear_raw(self):
        return self.payload

This method appears (in my traceback) to be called from valid_mic() but I cannot see anywhere self.payload is assigned a value in JoinAcceptPayload.

Could you enlighten me please.
Thanks

Communication seems OK, but nothing on TTN console in otaa mode

Hi there,
I'm trying this lib in Python, seems to works but can't find any trace on activation or device on TTN console
So I tried my board on RPI 3 with my custom LMIC port for RPI and its working fine and I can see activation and data into TTN console so it's not hardware related
Of course I copied deveui/appeui/appkey from my working LMICexample to Python ttn_otaa.py, I also adjusted pin definition and device is detected in python

here the result of otaa_tty.py, I set verbose to true, there is a receive done, all seems fine but I see nothing on ttn, did I missed something ? Is there any way to have (for debug) a join request/accept callback ?

Thanks for any help

root@pi03(rw):~/LoRaWAN# ./otaa_ttn.py
Mode <- SLEEP
Mode <- FSK_STDBY
Mode <- SLEEP
Mode <- FSK_STDBY
Mode <- SLEEP
SX127x LoRa registers:
 mode               SLEEP
 freq               868.099976 MHz
 coding_rate        CR4_5
 bw                 BW125
 spreading_factor   128 chips/symb
 implicit_hdr_mode  OFF
 rx_payload_crc     ON
 tx_cont_mode       OFF
 preamble           8
 low_data_rate_opti OFF
 agc_auto_on        ON
 symb_timeout       100
 freq_hop_period    0
 hop_channel        {'fhss_present_channel': 0, 'crc_on_payload': 0, 'pll_timeout': 0}
 payload_length     1
 max_payload_length 255
 irq_flags_mask     {'valid_header': 0, 'fhss_change_ch': 0, 'cad_done': 0, 'rx_timeout': 0, 'crc_error': 0, 'cad_detected': 0, 'rx_done': 0, 'tx_done': 0}
 irq_flags          {'valid_header': 0, 'fhss_change_ch': 0, 'cad_done': 0, 'rx_timeout': 0, 'crc_error': 0, 'cad_detected': 0, 'rx_done': 0, 'tx_done': 0}
 rx_nb_byte         0
 rx_header_cnt      0
 rx_packet_cnt      0
 pkt_snr_value      64.000000
 pkt_rssi_value     -157
 rssi_value         -157
 fei                0
 pa_select          PA_BOOST
 max_power          15.000000 dBm
 output_power       14.000000 dBm
 ocp                ON
 ocp_trim           100.000000 mA
 lna_gain           NOT_USED
 lna_boost_lf       0b0
 lna_boost_hf       0b0
 detect_optimize    0x3
 detection_thresh   0xa
 sync_word          0x34
 dio_mapping 0..5   [1, 0, 0, 0, 0, 0]
 tcxo               XTAL
 pa_dac             default
 fifo_addr_ptr      0x0
 fifo_tx_base_addr  0x80
 fifo_rx_base_addr  0x0
 fifo_rx_curr_addr  0x0
 fifo_rx_byte_addr  0x0
 status             {'signal_sync': 0, 'signal_detected': 0, 'modem_clear': 0, 'header_info_valid': 0, 'rx_coding_rate': 0, 'rx_ongoing': 0}
 version            0x12

Sending LoRaWAN message

Mode <- STDBY
Mode <- TX
TxDone
Mode <- STDBY
Mode <- RXCONT
RxDone
[84, 175, 16, 19, 0, 0, 121, 32, 1, 38, 3, 1, 24, 79, 132, 232, 86, 132, 184, 94, 132, 136, 102, 132, 88, 110, 132, 0]
0
32
[237, 65, 155, 123]
[237, 65, 155, 123]
True
['0x99', '0x8f', '0x75', '0xef', '0xb2', '0x4b', '0xc0', '0x77', '0xb', '0xcf', '0xb', '0x3d', '0xc0', '0x18', '0xf9', '0x12']
['0x16', '0x35', '0x62', '0x2c', '0xa6', '0x24', '0xab', '0x3d', '0xf1', '0x50', '0x8b', '0xf8', '0x77', '0x6f', '0xcb', '0xa7']

root@pi03(rw):~/LoRaWAN#

Important function

I have spent a lot of times, to understand why I cannot correct decode message from Lora server.
Payload on server's log and my payload on device wasn't be similar

ex:
server:-> 60B7B498008C3A000708389D8450070928F9835001B2BEA667D04DB2374D8D1429DFA1E240B560CA9FB3
device:-> 60b7b4f89c11af7d8e78af41abbbc9fbe67bf0da1c4ab124e9631cd16af6f20838238b2d4c972eb26ad2

And I have found this function with the help of which everything worked:
self.set_modem_config_3(True, True)

I hope this issue will help someone else

Unused pins

In the board_config.py, how we define unused pins? Getting always this AssertionError and I think it's because bad board configuration. I using the NiceRF LoRa1276 and a rasp zero w.

/home/pi/lora-testes/LoRaWAN/SX127x/board_config.py:51: RuntimeWarning: This channel is already in use, continuing anyway.  Use GPIO.setwarnings(False) to disable warnings.
  GPIO.setup(BOARD.LED, GPIO.OUT)
Traceback (most recent call last):
  File "tx_ttn.py", line 40, in <module>
    lora = LoRaWANsend(False)
  File "tx_ttn.py", line 15, in __init__
    super(LoRaWANsend, self).__init__(verbose)
  File "/home/pi/lora-testes/LoRaWAN/SX127x/LoRa.py", line 100, in __init__
    self.rx_chain_calibration(calibration_freq)
  File "/home/pi/lora-testes/LoRaWAN/SX127x/LoRa.py", line 856, in rx_chain_calibration
    self.set_freq(freq_bkup)
  File "/home/pi/lora-testes/LoRaWAN/SX127x/LoRa.py", line 282, in set_freq
    assert self.mode == MODE.SLEEP or self.mode == MODE.STDBY or self.mode == MODE.FSK_STDBY
AssertionError

class LoRaWAN can't find ?

Hi,

import LoRaWAN
........
Traceback (most recent call last):
File "D:/WorkSpace/pythonworkspace/LoRaWAN-master/Main.py", line 3, in
import LoRaWAN
ImportError: No module named LoRaWAN

I want to run it ,but have some errors, it can't find the LoRaWAN class .

Assertion Error

Traceback (most recent call last):
File "/home/jagdish/Downloads/try/LoRaWAN/tx_ttn.py", line 40, in
lora = LoRaWANsend(False)
File "/home/jagdish/Downloads/try/LoRaWAN/tx_ttn.py", line 15, in init
super(LoRaWANsend, self).init(verbose)
File "/home/jagdish/Downloads/try/LoRaWAN/SX127x/LoRa.py", line 100, in init
self.rx_chain_calibration(calibration_freq)
File "/home/jagdish/Downloads/try/LoRaWAN/SX127x/LoRa.py", line 856, in rx_chain_calibration
self.set_freq(freq_bkup)
File "/home/jagdish/Downloads/try/LoRaWAN/SX127x/LoRa.py", line 282, in set_freq
assert self.mode == MODE.SLEEP or self.mode == MODE.STDBY or self.mode == MODE.FSK_STDBY
AssertionError
Not able to solve this error. Please help.

Always waiting

Hi,

I'm trying to join ttn but I'm using the fork computenodes/dragino.
I try to use OTAA but this is what I get:

Mode <- SLEEP
Mode <- FSK_STDBY
Mode <- SLEEP
Mode <- FSK_STDBY
Mode <- SLEEP
2020-02-26 19:47:44,043 - Dragino - 57 - DEBUG - Nonce = [216, 39]
2020-02-26 19:47:44,044 - DraginoConfig - 299 - INFO - Using OTAA mode
2020-02-26 19:47:44,044 - DraginoConfig - 340 - DEBUG - Converted 16/16 items
2020-02-26 19:47:44,044 - DraginoConfig - 340 - DEBUG - Converted 16/16 items
2020-02-26 19:47:44,045 - DraginoConfig - 340 - DEBUG - Converted 32/32 items
2020-02-26 19:47:44,045 - DraginoConfig - 307 - DEBUG - GPS Baud Rate: 9600
2020-02-26 19:47:44,045 - DraginoConfig - 308 - DEBUG - GPS Serial Port: /dev/serial0
2020-02-26 19:47:44,045 - DraginoConfig - 309 - DEBUG - GPS Serial Timeout: 1
2020-02-26 19:47:44,045 - DraginoConfig - 310 - DEBUG - GPS Wait Period: 10
2020-02-26 19:47:44,045 - DraginoConfig - 311 - DEBUG - Spreading factor: 7
2020-02-26 19:47:44,045 - DraginoConfig - 312 - DEBUG - Max Power: 0F
2020-02-26 19:47:44,046 - DraginoConfig - 313 - DEBUG - Output Power: 0E
2020-02-26 19:47:44,046 - DraginoConfig - 314 - DEBUG - Sync Word: 34
2020-02-26 19:47:44,046 - DraginoConfig - 315 - DEBUG - RX CRC: True
2020-02-26 19:47:44,046 - DraginoConfig - 316 - DEBUG - Frame Count Filename: .lora_fcount
2020-02-26 19:47:44,046 - DraginoConfig - 317 - DEBUG - Auth mode: OTTA
2020-02-26 19:47:44,046 - DraginoConfig - 323 - DEBUG - Device EUI: [12, 9, 7, 6, 2, 7, 9, 10, 1, 5, 3, 9, 6, 3, 0, 7]
2020-02-26 19:47:44,046 - DraginoConfig - 324 - DEBUG - App EUI: [7, 0, 11, 3, 13, 5, 7, 14, 13, 0, 0, 2, 11, 4, 14, 13]
2020-02-26 19:47:44,046 - DraginoConfig - 325 - DEBUG - App Key: [15, 5, 3, 0, 14, 10, 1, 8, 15, 1, 8, 5, 6, 1, 10, 0, 6, 15, 3, 3, 2, 5, 14, 2, 0, 6, 4, 7, 8, 6, 5, 2]
2020-02-26 19:47:44,046 - Dragino - 101 - WARNING - No frame count file available
2020-02-26 19:47:44,047 - Dragino - 73 - INFO - Frequency = 867.1
2020-02-26 19:47:44,048 - Dragino - 171 - DEBUG - Performing OTTA Join
2020-02-26 19:47:44,049 - Dragino - 175 - INFO - App key = [15, 5, 3, 0, 14, 10, 1, 8, 15, 1, 8, 5, 6, 1, 10, 0, 6, 15, 3, 3, 2, 5, 14, 2, 0, 6, 4, 7, 8, 6, 5, 2]
2020-02-26 19:47:44,049 - Dragino - 176 - INFO - App eui = [7, 0, 11, 3, 13, 5, 7, 14, 13, 0, 0, 2, 11, 4, 14, 13]
2020-02-26 19:47:44,049 - Dragino - 177 - INFO - Dev eui = [12, 9, 7, 6, 2, 7, 9, 10, 1, 5, 3, 9, 6, 3, 0, 7]
Mode <- STDBY
Mode <- TX
Waiting
2020-02-26 19:47:44,133 - Dragino - 155 - DEBUG - TX Complete
Mode <- STDBY
Mode <- RXCONT
Waiting
Waiting
Waiting
....
Waiting

Do you have any idea what I'm doing wrong?

Thanks in advance!

Edit:
This is what I get with your script:
Using your script:

SX127x LoRa registers:
 mode               SLEEP
 freq               868.099976 MHz
 coding_rate        CR4_5
 bw                 BW125
 spreading_factor   128 chips/symb
 implicit_hdr_mode  OFF
 rx_payload_crc     ON
 tx_cont_mode       OFF
 preamble           8
 low_data_rate_opti OFF
 agc_auto_on        ON
 symb_timeout       100
 freq_hop_period    0
 hop_channel        {'pll_timeout': 0, 'crc_on_payload': 0, 'fhss_present_channel': 0}
 payload_length     39
 max_payload_length 255
 irq_flags_mask     {'rx_timeout': 0, 'rx_done': 0, 'crc_error': 0, 'valid_header': 0, 'tx_done': 0, 'cad_done': 0, 'fhss_change_ch': 0, 'cad_detected': 0}
 irq_flags          {'rx_timeout': 0, 'rx_done': 0, 'crc_error': 0, 'valid_header': 0, 'tx_done': 0, 'cad_done': 0, 'fhss_change_ch': 0, 'cad_detected': 0}
 rx_nb_byte         0
 rx_header_cnt      0
 rx_packet_cnt      0
 pkt_snr_value      64.000000
 pkt_rssi_value     -157
 rssi_value         -157
 fei                0
 pa_select          PA_BOOST
 max_power          15.000000 dBm
 output_power       14.000000 dBm
 ocp                ON
 ocp_trim           100.000000 mA
 lna_gain           NOT_USED
 lna_boost_lf       0b0
 lna_boost_hf       0b0
 detect_optimize    0x3
 detection_thresh   0xa
 sync_word          0x34
 dio_mapping 0..5   [1, 0, 0, 0, 0, 0]
 tcxo               XTAL
 pa_dac             default
 fifo_addr_ptr      0x0
 fifo_tx_base_addr  0x80
 fifo_rx_base_addr  0x0
 fifo_rx_curr_addr  0x0
 fifo_rx_byte_addr  0x0
 status             {'rx_coding_rate': 0, 'modem_clear': 0, 'header_info_valid': 0, 'rx_ongoing': 0, 'signal_sync': 0, 'signal_detected': 0}
 version            0x12

Sending LoRaWAN join request

TxDone

Feature complete?

Is this library ready and conform to LoRaWAN specifications? Can be used in parallel with LoRIOT?