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    Explore Pybytes | Official Documentation | Report a Firmware Bug/Issue | GitHub

    New Firmware Release Candidate v1.20.0

    Scheduled Pinned Locked Moved Announcements & News
    firmware
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    • D Offline
      danielm @robert-hh
      last edited by danielm

      @robert-hh
      It seems that you don't have issues with LTE object initialization (network.LTE())?
      Could you please try to run the code from my previous post and perform several soft-resets? There are some LTE stats included as well.

      Btw longest attach I experienced ever was about 5mins long. Usually it takes only several seconds and I am testing in an area with not optimal conditions. It seems the duration really depends on conditions in specific network.

      What is the proposed change of CTRL-F behavior?

      robert-hhR 1 Reply Last reply Reply Quote 0
      • robert-hhR Offline
        robert-hh @danielm
        last edited by

        @danielm SOft reset does not reset the LTE modem. A subsequent LTE() fails for me.
        The changed cttrl-f behaviour allows to disable safe boot via ctrl-f in case you need it.

        D 1 Reply Last reply Reply Quote 0
        • D Offline
          danielm @robert-hh
          last edited by danielm

          @robert-hh
          In our application we are resetting the modem with 'AT+CFUN=1,1' command after each boot. Anyway for that the LTE object must be already initialized.

          A workaround might be to initialize UART object on LTE_RX and LTE_TX pins but I did not try that yet and I am not sure if it will be allowed by Pycom MicroPython.

          EDIT: It seems that it is possible to init UART object using P20 and P18, but I am not sure what UART parameters to set. Probably can be found in modlte.c and included files.

          In normal situation I would prefer to avoid resetting the modem as it can be already attached operating in eDRX or PSM mode. However the LTE.init() must work reliably first.

          robert-hhR 1 Reply Last reply Reply Quote 0
          • D Offline
            danielm
            last edited by

            @iwahdan
            This code in main.py will hang eventually:

            import machine
import network
lte = network.LTE()
print("LTE initialized")
machine.reset()

            This code in main.py will hang in few rounds:

            import machine
import network
lte = network.LTE()
print("LTE initialized")
lte.deinit()
print("LTE deinitialized")
machine.reset()

            I believe we are facing some timing issues. Firmware is always able to trigger safe-boot reset using Ctrl-F. Tested with NB1-40343.

            I 1 Reply Last reply Reply Quote 0
            • I Offline
              iwahdan @danielm
              last edited by

              @danielm can you try with putting a sleep time of 1-2 sec before LTE init

              Wahdan

              D C 3 Replies Last reply Reply Quote 0
              • D Offline
                danielm @iwahdan
                last edited by danielm

                @iwahdan
                This code in main.py runs for 10 minutes without any hang:

                import machine
import network
import time
time.sleep(2)
lte = network.LTE()
print("LTE initialized")
lte.deinit()
print("LTE deinitialized")
machine.reset()
                1 Reply Last reply Reply Quote 0
                • robert-hhR Offline
                  robert-hh @danielm
                  last edited by

                  @danielm The UART runs at 921600 Baud, 8N1 for the other parameters..

                  D 1 Reply Last reply Reply Quote 0
                  • D Offline
                    danielm @robert-hh
                    last edited by

                    @robert-hh
                    Yes, I already found out but I did not get any response from the modem when initialized on bus 1. MP does not allow to initialize on bus 2.

                    1 Reply Last reply Reply Quote 0
                    • D Offline
                      danielm @iwahdan
                      last edited by danielm

                      @iwahdan
                      Here is updated test code v4:
                      https://drive.google.com/open?id=1RPJlMgWEqe_eMwWZEvPhof2E_Qpo1s1v

                      Changes:

                      • added 2s sleep time before LTE init
                      • disabled WDT
                      • ussl.wrap_socket() in urequests with defined timeout parameter
                      • auto restart after 8 HTTPS requests

                      Issues:

                      • rare LTE init hang (In my opinion a timeout should be implemented for lte.init() as well)
                      • when modem synchro state goes to OFF (why???), lte.isattached() and lte.isconnected() remain True and this state continues until next HARD reset (including modem reset):
                      rst:0x7 (TG0WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff8028,len:8
load:0x3fff8030,len:1984
load:0x4009fa00,len:0
load:0x4009fa00,len:19088
entry 0x400a05e4
Initializing filesystem as FatFS!
INFO Starting initialization of LTE
INFO LTE initialized
LTE is attached after init: True
LTE is connected after init: False
INFO Attached to LTE network
INFO LTE connect command sent
INFO Connected to LTE network
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-96.24dBm RSRQ:-14.63dB
INFO 1. HTTP POST successful: {"args":{},"data":{"time":"15"},"files":{},"form":{},"headers":{"x-forwarded-proto":"https","host":"54.234.238.118","content-length":"14","accept":"application/json","content-type":"application/json","x-forwarded-port":"443"},"json":{"time":"15"},"url":"https://54.234.238.118/post"} (duration: 23s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-96.90001dBm RSRQ:-15.2dB
WARNING 2. HTTP POST failed: -26624 (duration: 17s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-98.25dBm RSRQ:-15.95dB
INFO 3. HTTP POST successful: {"args":{},"data":{"time":"75"},"files":{},"form":{},"headers":{"x-forwarded-proto":"https","host":"54.234.238.118","content-length":"14","accept":"application/json","content-type":"application/json","x-forwarded-port":"443"},"json":{"time":"75"},"url":"https://54.234.238.118/post"} (duration: 15s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-97.04dBm RSRQ:-15.45dB
INFO 4. HTTP POST successful: {"args":{},"data":{"time":"100"},"files":{},"form":{},"headers":{"x-forwarded-proto":"https","host":"54.234.238.118","content-length":"15","accept":"application/json","content-type":"application/json","x-forwarded-port":"443"},"json":{"time":"100"},"url":"https://54.234.238.118/post"} (duration: 16s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-97.40001dBm RSRQ:-15.8dB
WARNING 5. HTTP POST failed: -26624 (duration: 14s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-96.84dBm RSRQ:-15.1dB
INFO 6. HTTP POST successful: {"args":{},"data":{"time":"144"},"files":{},"form":{},"headers":{"x-forwarded-proto":"https","host":"54.234.238.118","content-length":"15","accept":"application/json","content-type":"application/json","x-forwarded-port":"443"},"json":{"time":"144"},"url":"https://54.234.238.118/post"} (duration: 14s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-97.61001dBm RSRQ:-15.41dB
WARNING 7. HTTP POST failed: -26624 (duration: 14s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-95.44dBm RSRQ:-14.55dB
INFO 8. HTTP POST successful: {"args":{},"data":{"time":"186"},"files":{},"form":{},"headers":{"x-forwarded-proto":"https","host":"54.234.238.118","content-length":"15","accept":"application/json","content-type":"application/json","x-forwarded-port":"443"},"json":{"time":"186"},"url":"https://54.234.238.118/post"} (duration: 18s)
Restarting...
ets Jun  8 2016 00:22:57

rst:0x7 (TG0WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff8028,len:8
load:0x3fff8030,len:1984
load:0x4009fa00,len:0
load:0x4009fa00,len:19088
entry 0x400a05e4
Initializing filesystem as FatFS!
INFO Starting initialization of LTE
INFO LTE initialized
LTE is attached after init: True
LTE is connected after init: False
INFO Attached to LTE network
INFO LTE connect command sent
INFO Connected to LTE network
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-96.48dBm RSRQ:-15.11dB
INFO 1. HTTP POST successful: {"args":{},"data":{"time":"15"},"files":{},"form":{},"headers":{"x-forwarded-proto":"https","host":"54.234.238.118","content-length":"14","accept":"application/json","content-type":"application/json","x-forwarded-port":"443"},"json":{"time":"15"},"url":"https://54.234.238.118/post"} (duration: 16s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-96.67dBm RSRQ:-14.58dB
WARNING 2. HTTP POST failed: -26624 (duration: 15s)
LTE Attached:True Connected:True Synchro state:OFF RSRP:-2.147484e+07dBm RSRQ:-17.19dB
WARNING 3. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:OFF RSRP:-2.147484e+07dBm RSRQ:-17.19dB
WARNING 4. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:OFF RSRP:-2.147484e+07dBm RSRQ:-17.19dB
WARNING 5. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:OFF RSRP:-2.147484e+07dBm RSRQ:-17.19dB
WARNING 6. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:OFF RSRP:-2.147484e+07dBm RSRQ:-17.19dB
WARNING 7. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:OFF RSRP:-2.147484e+07dBm RSRQ:-17.19dB
WARNING 8. HTTP POST failed: timed out (duration: 10s)
Restarting...
ets Jun  8 2016 00:22:57

rst:0x7 (TG0WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff8028,len:8
load:0x3fff8030,len:1984
load:0x4009fa00,len:0
load:0x4009fa00,len:19088
entry 0x400a05e4
Initializing filesystem as FatFS!
INFO Starting initialization of LTE
INFO LTE initialized
LTE is attached after init: True
LTE is connected after init: False
INFO Attached to LTE network
INFO LTE connect command sent
INFO Connected to LTE network
LTE Attached:True Connected:True Synchro state:OFF RSRP:-2.147484e+07dBm RSRQ:-17.19dB
WARNING 1. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:OFF RSRP:-2.147484e+07dBm RSRQ:-17.19dB
WARNING 2. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:OFF RSRP:-2.147484e+07dBm RSRQ:-17.19dB

                      Another type of connection failure - Synchro state is CELL_ACQUIRED, RSRP and RSRQ at acceptable levels, but HTTPS request always fails. It always timeouts after 10s (timeout defined for socket and ssl operations) therefore I believe that failing operation is socket.connect(). After hard reset the connection starts working again.

                      rst:0x7 (TG0WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff8028,len:8
load:0x3fff8030,len:1984
load:0x4009fa00,len:0
load:0x4009fa00,len:19088
entry 0x400a05e4
Initializing filesystem as FatFS!
INFO Starting initialization of LTE
INFO LTE initialized
LTE is attached after init: True
LTE is connected after init: False
INFO Attached to LTE network
INFO LTE connect command sent
INFO Connected to LTE network
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-96.16dBm RSRQ:-14.57dB
WARNING 1. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-95.78dBm RSRQ:-14.1dB
WARNING 2. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-95.22dBm RSRQ:-13.86dB
WARNING 3. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-95.22dBm RSRQ:-13.99dB
WARNING 4. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-94.98dBm RSRQ:-14.12dB
WARNING 5. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-95.23dBm RSRQ:-14.06dB
WARNING 6. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-95.25001dBm RSRQ:-14.09dB
WARNING 7. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-93.96dBm RSRQ:-13.97dB
WARNING 8. HTTP POST failed: timed out (duration: 10s)
Restarting...
ets Jun  8 2016 00:22:57

rst:0x7 (TG0WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff8028,len:8
load:0x3fff8030,len:1984
load:0x4009fa00,len:0
load:0x4009fa00,len:19088
entry 0x400a05e4
Initializing filesystem as FatFS!
INFO Starting initialization of LTE
INFO LTE initialized
LTE is attached after init: True
LTE is connected after init: False
INFO Attached to LTE network
INFO LTE connect command sent
INFO Connected to LTE network
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-93.3dBm RSRQ:-13.63dB
WARNING 1. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-94.2dBm RSRQ:-13.46dB
WARNING 2. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-93.72001dBm RSRQ:-13.85dB
WARNING 3. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-95.63dBm RSRQ:-14.87dB
WARNING 4. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-95.43dBm RSRQ:-14.86dB
WARNING 5. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-94.25dBm RSRQ:-13.74dB
WARNING 6. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-94.55dBm RSRQ:-14.13dB
WARNING 7. HTTP POST failed: timed out (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-93.21dBm RSRQ:-13.11dB
WARNING 8. HTTP POST failed: timed out (duration: 10s)
Restarting...
ets Jun  8 2016 00:22:57

rst:0x7 (TG0WDT_SYS_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:DIO, clock div:1
load:0x3fff8028,len:8
load:0x3fff8030,len:1984
load:0x4009fa00,len:0
load:0x4009fa00,len:19088
entry 0x400a05e4
Initializing filesystem as FatFS!
INFO Starting initialization of LTE
INFO LTE initialized
LTE is attached after init: True
LTE is connected after init: False
INFO Attached to LTE network
INFO LTE connect command sent
INFO Connected to LTE network
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-92.36dBm RSRQ:-13.48dB
WARNING 1. HTTP POST failed: timed out (duration: 10s)

────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────────

Session stopped
    - Press <return> to exit tab
    - Press R to restart session
    - Press S to save terminal output to file

Error reading from serial device
INFO LTE initialized
LTE is attached after init: False
LTE is connected after init: False
INFO LTE attach command sent (band:20 APN:nbiot.telekom.sk)
LTE Attached:False Connected:False Synchro state:OFF RSRP:0.0dBm RSRQ:0.0dB
LTE Attached:False Connected:False Synchro state:CELL_SEARCH RSRP:0.0dBm RSRQ:0.0dB
LTE Attached:False Connected:False Synchro state:MIB_DETECT RSRP:-93.55dBm RSRQ:-13.73dB
LTE Attached:False Connected:False Synchro state:RSRP RSRP:-97.54001dBm RSRQ:-16.78dB
LTE Attached:False Connected:False Synchro state:CELL_SEARCH RSRP:-2.147484e+07dBm RSRQ:-16.39dB
LTE Attached:False Connected:False Synchro state:SIB1_ACQ RSRP:-93.1dBm RSRQ:-14.82dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.0dBm RSRQ:-14.31dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-92.54001dBm RSRQ:-13.61dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-92.72dBm RSRQ:-13.49dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-92.7dBm RSRQ:-13.33dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-92.74dBm RSRQ:-13.24dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-92.76999dBm RSRQ:-13.26dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-92.69dBm RSRQ:-13.26dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-92.79dBm RSRQ:-13.3dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-92.75001dBm RSRQ:-13.2dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.5dBm RSRQ:-14.4dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.08dBm RSRQ:-14.03dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-92.65dBm RSRQ:-13.66dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-92.40001dBm RSRQ:-13.32dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-92.31dBm RSRQ:-13.24dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-92.41dBm RSRQ:-13.28dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-92.45dBm RSRQ:-13.28dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-92.76999dBm RSRQ:-13.36dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.13dBm RSRQ:-13.63dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.25dBm RSRQ:-13.68dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.3dBm RSRQ:-13.71dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.21dBm RSRQ:-13.51dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.21dBm RSRQ:-13.47dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.13dBm RSRQ:-13.49dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.11999dBm RSRQ:-13.57dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.11dBm RSRQ:-13.64dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.18999dBm RSRQ:-13.76dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.18999dBm RSRQ:-13.75dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.34dBm RSRQ:-13.79dB
LTE Attached:False Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.27dBm RSRQ:-13.72dB
LTE Attached:True Connected:False Synchro state:CELL_ACQUIRED RSRP:-93.18dBm RSRQ:-13.64dB
INFO Attached to LTE network
INFO LTE connect command sent
INFO Connected to LTE network
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-93.09dBm RSRQ:-13.31dB
INFO 1. HTTP POST successful: {"args":{},"data":{"time":"34"},"files":{},"form":{},"headers":{"x-forwarded-proto":"https","host":"54.234.238.118","content-length":"14","accept":"application/json","content-type":"application/json","x-forwarded-port":"443"},"json":{"time":"34"},"url":"https://54.234.238.118/post"} (duration: 13s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-93.38dBm RSRQ:-13.57dB
INFO 2. HTTP POST successful: {"args":{},"data":{"time":"56"},"files":{},"form":{},"headers":{"x-forwarded-proto":"https","host":"54.234.238.118","content-length":"14","accept":"application/json","content-type":"application/json","x-forwarded-port":"443"},"json":{"time":"56"},"url":"https://54.234.238.118/post"} (duration: 12s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-92.95dBm RSRQ:-13.43dB
INFO 3. HTTP POST successful: {"args":{},"data":{"time":"78"},"files":{},"form":{},"headers":{"x-forwarded-proto":"https","host":"54.234.238.118","content-length":"14","accept":"application/json","content-type":"application/json","x-forwarded-port":"443"},"json":{"time":"78"},"url":"https://54.234.238.118/post"} (duration: 11s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-94.05dBm RSRQ:-14.2dB
INFO 4. HTTP POST successful: {"args":{},"data":{"time":"98"},"files":{},"form":{},"headers":{"x-forwarded-proto":"https","host":"54.234.238.118","content-length":"14","accept":"application/json","content-type":"application/json","x-forwarded-port":"443"},"json":{"time":"98"},"url":"https://54.234.238.118/post"} (duration: 12s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-93.47dBm RSRQ:-13.76dB
INFO 5. HTTP POST successful: {"args":{},"data":{"time":"120"},"files":{},"form":{},"headers":{"x-forwarded-proto":"https","host":"54.234.238.118","content-length":"15","accept":"application/json","content-type":"application/json","x-forwarded-port":"443"},"json":{"time":"120"},"url":"https://54.234.238.118/post"} (duration: 10s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-92.95dBm RSRQ:-13.53dB
INFO 6. HTTP POST successful: {"args":{},"data":{"time":"140"},"files":{},"form":{},"headers":{"x-forwarded-proto":"https","host":"54.234.238.118","content-length":"15","accept":"application/json","content-type":"application/json","x-forwarded-port":"443"},"json":{"time":"140"},"url":"https://54.234.238.118/post"} (duration: 11s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-93.71dBm RSRQ:-13.73dB
INFO 7. HTTP POST successful: {"args":{},"data":{"time":"160"},"files":{},"form":{},"headers":{"x-forwarded-proto":"https","host":"54.234.238.118","content-length":"15","accept":"application/json","content-type":"application/json","x-forwarded-port":"443"},"json":{"time":"160"},"url":"https://54.234.238.118/post"} (duration: 13s)
LTE Attached:True Connected:True Synchro state:CELL_ACQUIRED RSRP:-93.46dBm RSRQ:-13.82dB
INFO 8. HTTP POST successful: {"args":{},"data":{"time":"182"},"files":{},"form":{},"headers":{"x-forwarded-proto":"https","host":"54.234.238.118","content-length":"15","accept":"application/json","content-type":"application/json","x-forwarded-port":"443"},"json":{"time":"182"},"url":"https://54.234.238.118/post"} (duration: 11s)
Restarting...
                      I 1 Reply Last reply Reply Quote 0
                      • I Offline
                        iwahdan @danielm
                        last edited by

                        @danielm ok, i’ll Run your code tomorrow on our NB-IoT emulator in the office to try to see where is the problem

                        Wahdan

                        D 1 Reply Last reply Reply Quote 0
                        • R Offline
                          reidfo
                          last edited by

                          This code seems to be running okay on a FIPY, with the exception of rtc.ntp_sync(). As was noticed a while back in [this thread]](https://forum.pycom.io/topic/1414/i-swore-i-had-rtc-ntp_sync-working-on-my-lopy-and-now-i-can-t-get-it-working-at-all/2), after a soft reset (i.e. after uploading code from Pymakr) the RTC won't sync. I added a check for this and machine.reset() to my code, but it still won't sync after that. I have to physically hit the reset button on the FIPY before the clock will sync again.

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                          • D Offline
                            danielm @iwahdan
                            last edited by

                            @iwahdan
                            OK, are you able to simulate deteriorating radio conditions/packet loss? In my opinion it is necessary to perform tests in conditions which are close to limits of modulation/modem capabilities.

                            Some LTE-related questions:

                            1. Does current NB-IoT firmware for Sequans modem support all Coverage Extension modes?
                            2. If so, how exactly is the switch between EC0, EC1 and EC2 performed?
                            3. What are the EC mode switch thresholds for the Sequans modem? The algorithm should be based on RSRP value, or am I wrong?
                            4. Is it necessary to trigger re-attach from application code in case of EC mode change?
                            1 Reply Last reply Reply Quote 0
                            • D Offline
                              danielm @reidfo
                              last edited by

                              @reidfo
                              As an alternative to built-in NTP sync implementation you may use this simple code:

                              NTP_QUERY = bytearray(48)
NTP_QUERY[0] = 0x1b				
addr = socket.getaddrinfo(<NTP_SERVER>, 123)[0][-1]
s = socket.socket(socket.AF_INET, socket.SOCK_DGRAM)
s.settimeout(3) #optional
res = s.sendto(NTP_QUERY, addr)
msg = s.recv(48)
s.close()
val = struct.unpack("!I", msg[40:44])[0] - 2208988800 # 70 years difference between NTP and Pycom epoch
tm = time.localtime(val)
self.rtc.init(tm)

                              Don't forget to implement handling of socket exceptions.

                              1 Reply Last reply Reply Quote 1
                              • C Offline
                                crumble @iwahdan
                                last edited by

                                @iwahdan

                                Why shall we wait for all the inits? Waiting seems not to be a reliable method for the pytrack. We need methods to check if a module is ready or wait for a init signal.

                                #main.py
[... a lot of includes of internal and *mpy modules ...]

_startup_ticks = utime.ticks_ms()

[... do some init stuff like WiFi and NTP ...]

_wait_init = 3000 - utime.ticks_diff(utime.ticks_ms(),  _startup_ticks)
if _wait_init > 0:
    print('waiting')
    utime.sleep_ms(_wait_init)
print(_wait_init)

#time.sleep(1)
py = Pytrack()
print('done init pytrack')

                                will fail somtimes if wait time is 2000ms. Even 3000ms is to short. Sometimes t fails like usualy with i2c errors, once it never returned from Pytrack()

                                I give now 4500ms a try. It will be hard to trust the settings.

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                                • C Offline
                                  crumble @iwahdan
                                  last edited by

                                  How can I check the type of the file system.
                                  I flashed the firmware under Win10 with update tool 1.15.2.b1

                                  The last update of 1.19.0.b_ on a Lopy with LIttleFS setting showed me on boot up that LittleFS is used. Now it shows me FatFS.

                                  I tried a second upgrade with reformat checkbox set and it is still showing:

                                  Autoconnect: Found a PyCom board on USB
Autoconnect: Connecting on COM3...
Initializing filesystem as FatFS!
                                  R 1 Reply Last reply Reply Quote 0
                                  • R Offline
                                    reidfo @crumble
                                    last edited by

                                    @crumble While I don't know about the first issue, I have seen the second. For me, on MacOS, it seems like I saw the option for LittleFS in the updater (or maybe I'm imagining it) but now I don't. To get LittleFS I have compiled the firmware myself.

                                    P 1 Reply Last reply Reply Quote 0
                                    • P Offline
                                      panda @reidfo
                                      last edited by

                                      @reidfo Same here for the Windows updater. LittleFS option is there, but it does not work.

                                      That issue aside, Writing to files I now get an unexpected error at random times:

                                      ASSERT_PARAM(2051 0), in llc_util.c at line 289

                                      1 Reply Last reply Reply Quote 0
                                      • P Offline
                                        panda
                                        last edited by panda

                                        Actually that error is not related to writing a file. I am not sure what is causing it. It does not appear to happen in direct response to any particular user scripts/code, but in safe mode it is not an issue.

                                        1 Reply Last reply Reply Quote 0
                                        • C Offline
                                          combaindeft @iwahdan
                                          last edited by

                                          @iwahdan

                                          Hi,

                                          I'm still having DNS Resolve issues with this release too

                                          https://forum.pycom.io/topic/4055/nb-iot-in-hungary/3
                                          https://forum.pycom.io/topic/4021/usocket-getaddrinfo-issues

                                          1 Reply Last reply Reply Quote 0
                                          • I Offline
                                            iwahdan
                                            last edited by

                                            Hello All ,

                                            I've released a new version of Release candidate v1.20.0.rc1 having the following updates:

                                            Improvments

                                            • Exposed Keyboard Interrupts Control to Micropython

                                            Bug Fixes

                                            • Fixed DeepSleep high current Consumption when LTE is not Initialized
                                            • Increased Delay before initialising RGB color to not Have RGB turn green at startup

                                            Link to release on GitHub https://github.com/pycom/pycom-micropython-sigfox/releases/tag/v1.20.0.rc1

                                            you can also download this Firmware via Firmware updater using development as firmware type.

                                            Wahdan

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