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

    GPY deepsleep High current

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    • K Offline
      kjm
      last edited by kjm

      My understanding is that lte.deinit with detach=False leaves the modem radio switched on during deepsleep. Maybe try a regular lte.deinit() instead?

      1 Reply Last reply Reply Quote 1
      • P Offline
        peterp
        last edited by

        Yes! If you're not using PSM https://development.pycom.io/tutorials/lte/power/#power-saving-mode you most likely don't want to use detach=False

        1 Reply Last reply Reply Quote 0
        • B Offline
          bouchard.claude
          last edited by

          Thanks, I will try this and see if it help ! For now I Have aroung 280 uA after removing the detach. Wish is way better, but I think I should be able to get lower than that?? I was expecting agout 50-60 is i'm not mistaken?
          alt text

          Also after monitoring the system with the serial interface , I saw that I got a 'LTE modem is in data state, cannot send AT commands' while connecting ( it only happen rarely). This crashed the execution and may explain why my batteries where draining so fast ( maybe the module got stuck in a crashed state, in full power mode). I removed the AT! debug command and also added a watchdog ( using WDT). That explain why battery goit drained very fast, but not explain the still high current..
          Many thanks for the help and ill keep you posted

          1 Reply Last reply Reply Quote 0
          • B Offline
            bouchard.claude
            last edited by

            Small update: I tried with this very simple code to eliminate LTE modem issue:

            import machine
            import time
            time.sleep(20) 
            machine.deepsleep(30000)
            
            

            and i Got the same 280 uA current on deepsleep. So Im not sure if at that point I should look at the board itself ? My understanding is that if I dont init any radio, everything should be off...

            T 1 Reply Last reply Reply Quote 0
            • T Offline
              tuftec @bouchard.claude
              last edited by

              @bouchard-claude The latest firmware actually has the LTE modem enabled on boot so that may still be an issue. You may still need to disable it, but understand from other reading that this is a know issue currently that is still to be fixed.

              You might need to check your logic external to the Gpy device. Try forcing the output pins into a defined state (using the pin hold function) prior to going into deepsleep, to minimise any leakage paths.

              1 Reply Last reply Reply Quote 0
              • B Offline
                bouchard.claude
                last edited by

                @bouchard-claude said in GPY deepsleep High current:

                from network import LTE

                Thanks @tuftec , funny enough, I was actually testing this as you wrote me this reply. So I ran this simple code with nothing attached to the GPY ( powered by VIN). I'm not 100% sure of my code, But I think it really make sure I dont have any pull resistor on any pin + making sure the LTE if off. and im still getting the exact same 280 uA while deepsleeping... im still trying to figure out

                import machine
                import time
                from machine import Pin
                from network import LTE
                time.sleep(10) 
                p_in = Pin('P1', mode=Pin.IN, pull=None)
                p_2 = Pin('P2', mode=Pin.IN, pull=None)
                p_3 = Pin('P3', mode=Pin.IN, pull=None)
                p_4 = Pin('P4', mode=Pin.IN, pull=None)
                p_8 = Pin('P8', mode=Pin.IN, pull=None)
                p_9 = Pin('P9', mode=Pin.IN, pull=None)
                p_10 = Pin('P10', mode=Pin.IN, pull=None)
                p_11 = Pin('P11', mode=Pin.IN, pull=None)
                p_12 = Pin('P12', mode=Pin.IN, pull=None)
                p_19 = Pin('P19', mode=Pin.IN, pull=None)
                p_20 = Pin('P20', mode=Pin.IN, pull=None)
                p_21 = Pin('P21', mode=Pin.IN, pull=None)
                p_22 = Pin('P22', mode=Pin.IN, pull=None)
                p_23 = Pin('P23', mode=Pin.IN, pull=None)
                
                lte = LTE()
                lte.init()
                lte.deinit()
                print('sleep')
                machine.deepsleep(30000)
                
                
                T 1 Reply Last reply Reply Quote 0
                • T Offline
                  tuftec @bouchard.claude
                  last edited by

                  @bouchard-claude
                  I would expect that the power consumption should be pretty low with your test setup. I think we need some comment from Pycom on this one.
                  I expect it is still tied up with the LTE modem power down bug.

                  B 1 Reply Last reply Reply Quote 0
                  • B Offline
                    bouchard.claude @tuftec
                    last edited by

                    @tuftec You are right as this setup cannot be more simple and it show a consumption many more time the one I was planning for according to the doc, affecting greatly my estimated battery life ( wake up 2 time a day, so most of current is sleeping). I'm not sure how to get the attention of someone from Pycom as this is a community forum, but I think we will require this ( I really dont know what else I can test on my side).
                    Ill try to understand how it work to contact them or if they read message on this board.

                    Meanwhile thanks for the help.

                    T K 2 Replies Last reply Reply Quote 0
                    • T Offline
                      tuftec @bouchard.claude
                      last edited by

                      @bouchard-claude
                      @Gijs can you help with this one. Maybe you could supply some clarity on the expected low power performance when using LTE.

                      Peter.

                      1 Reply Last reply Reply Quote 0
                      • K Offline
                        kjm @bouchard.claude
                        last edited by

                        @bouchard-claude Try

                        import pycom; pycom.lte_modem_en_on_boot(0); pycom.wifi_on_boot(0)
                        

                        at the start of your program to be sure both radios are off to begin with. My gpy (1.20.1.r1) deepsleeps at 40uA

                        T 1 Reply Last reply Reply Quote 1
                        • T Offline
                          tuftec @kjm
                          last edited by

                          @kjm Sure just setting those boot flags once the program has started is too late. They will alter the next boot behaviour but not this one???????

                          From what I have read a lte.init(); lte.deinit() cycle should power the modem down.
                          Maybe the issue is actually the wlan. In my setup the wlan is on by default at boot and I specifically disable it with wlan.deinit() when I no longer need it, based on the status of a switch.

                          B 1 Reply Last reply Reply Quote 0
                          • B Offline
                            bouchard.claude @tuftec
                            last edited by

                            @tuftec Yeah, my understaning too is that thoses flag are to be set once, cause once the main.py is loaded, its way too late. But I did try and set the wifi on boot to 0 using the shell over serial, and I did re-test with no difference. As for the LTE on boot, well, I really need to use it during operation ( data is sent overs CAT-1 LTE). I can try and test it tomorow, but that wont solve my problem :S ( but maybe it would point to a direction)

                            T 1 Reply Last reply Reply Quote 1
                            • T Offline
                              tuftec @bouchard.claude
                              last edited by

                              @bouchard-claude Yes, I understand you need LTE but do you use wifi (wlan).
                              In my application I use wlan, lora, sigfox & nb-iot. I make decisions at various stages in my code to enable/disable the relevant radio system that I need.
                              The wifi is typically on when the system boots so that you can set up a REPL connection over wifi. I deliberately turn it off and disable the REPL server at and early stage when I determine that I do not need it. turn it on only as a system configuration aide in the field. Otherwise, I need it to be off for security. You might need to explore turning off all the bits you do not need.

                              1 Reply Last reply Reply Quote 0
                              • B Offline
                                bouchard.claude
                                last edited by

                                yes, exactly what i'm doing too. This project only required LTE, so im only powering one the LTE radio, and only during time for transmission and deinit it after. As for the Wifi, I did set the power_on_boot to off as a first setup thing once I pushed the initial code.

                                So I just did the test with the lte_on_boot and wifi_on_boot ( I set them manualy + put them in a empty main.py code with only thoses and a deepsleep command) and the current stayed a 266 uA all the time in the deepsleep. So even with the radio not on at boot the currect of the board is high
                                I'm using GPy with firmware version 1.20.2.r3 . Any way to see what changed between version?

                                T K 2 Replies Last reply Reply Quote 0
                                • T Offline
                                  tuftec @bouchard.claude
                                  last edited by

                                  @bouchard-claude You could try wading through all the release logs looking for changes, but I have not found a lot of joy in that previously. Maybe you need to test the old 1.20.1r1 release on you Gpy. Hopefully that will provide some insight.

                                  I would also do the wlan init/deinit thing early in your code just to be sure it is off. Also disable the server in the same way. server.deinit() after you have defined it. The server interacts with the wlan. I am not sure if it enables it without you knowing. Worth a try anyway.

                                  1 Reply Last reply Reply Quote 0
                                  • B Offline
                                    bouchard.claude
                                    last edited by

                                    Yeah, but all the test im running now are with no code , Only the deepsleep and the stuff we are trying ( no lte on boot, no wifi on boot, lte deinit() ...) and it has the exact same current draw then with my complete code during deepsleep.

                                    A weird things I just found is every time I run this to check my firmware version:

                                    import sqnsupgrade
                                    sqnsupgrade.info()
                                    

                                    it give me the info, then immetiatly crash, core dump and restart . So maybe something is up with the whay the firmware deal with the modem? Ill try and switch versions to see if it help.. And also will try on a different GPy ( and a fipy) when ill have some time

                                    T 1 Reply Last reply Reply Quote 0
                                    • T Offline
                                      tuftec @bouchard.claude
                                      last edited by

                                      @bouchard-claude Are you getting the crash with your current measuring device in circuit? Previously when I was doing low current measurements, on devices that were capable of considerably higher current draw, I would wire a shut switch across my meter so that I could bypass it when I needed full current. Usually a device capable of measuring ultra low currents is not capable of handling the full power requirements of the device.
                                      Typically I would start the system with the shut switch closed, then place the device into its low power state and open the switch just to take the low current measuement. This avoids any issues with large voltage drops across you meter when the current ramps up.

                                      B 1 Reply Last reply Reply Quote 0
                                      • B Offline
                                        bouchard.claude @tuftec
                                        last edited by

                                        @tuftec Exactly what I do too ;) I have a shut switch that i open once the device is deepsleeping only. ( my test that make it crash is using the USB connection and the breakout board to a computer, no current measurement taken during this test.)

                                        T 1 Reply Last reply Reply Quote 0
                                        • T Offline
                                          tuftec @bouchard.claude
                                          last edited by

                                          @bouchard-claude Interesting.
                                          Just tried the sqnsupgrade.info() test with a FiPy on my breakout board (V3.1) and get exactly the same issue. It crashes after displaying the modem information. Something about a prohibited Store!!!!!

                                          >>> import sqnsupgrade
                                          2020/12/30 17:34:59: import sqnsupgrade
                                          >>> sqnsupgrade.info()
                                          2020/12/30 17:35:20: sqnsupgrade.info()
                                          <<< Welcome to the SQN3330 firmware updater [1.2.6] >>>
                                          >>> FiPy with firmware version 1.20.2.r3
                                          2020/12/30 17:35:29: Your modem is in application mode. Here is the current version:
                                          2020/12/30 17:35:31: UE6.0.0.0
                                          LR6.0.0.0-41019
                                          
                                          IMEI: 354346090972786
                                          Guru Meditation Error: Core  0 panic'ed (StoreProhibited). Exception was unhandled.
                                          Core 0 register dump:
                                          PC      : 0x4019072a  PS      : 0x00060830  A0      : 0x801901df  A1      : 0x3ffbaef0  
                                          A2      : 0x00000000  A3      : 0x00000000  A4      : 0x00000005  A5      : 0xffffffff  
                                          A6      : 0x00021266  A7      : 0x00060021  A8      : 0x8018fde0  A9      : 0x3ffbaeb0  
                                          A10     : 0x0000002c  A11     : 0x00000000  A12     : 0x3ffb9f28  A13     : 0x00000000  
                                          A14     : 0x3ffb9f38  A15     : 0x00000001  SAR     : 0x00000000  EXCCAUSE: 0x0000001d  
                                          EXCVADDR: 0x0000002d  LBEG    : 0x4009412c  LEND    : 0x4009415a  LCOUNT  : 0xffffffff  
                                          
                                          ELF file SHA256: 0000000000000000000000000000000000000000000000000000000000000000
                                          
                                          Backtrace: 0x4019072a:0x3ffbaef0 0x401901dc:0x3ffbaf10 0x40180044:0x3ffbaf30
                                          
                                          ================= CORE DUMP START =================
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                                          AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAABbWIg==
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                                          AAAAAAAAAACsfP0/AAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAAA
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                                          AAAAAA==
                                          ================= CORE DUMP END =================
                                          Rebooting...
                                          ets Jun  8 2016 00:22:57
                                          
                                          rst:0xc (SW_CPU_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:0x3fff8020,len:8
                                          load:0x3fff8028,len:2128
                                          load:0x4009fa00,len:19760
                                          entry 0x400a05bc
                                          2020/12/30 17:35:37: SYSTEM RESTART?```
                                          

                                          Maybe @gijs can help here.

                                          I have not seen this previously.
                                          Maybe something to do with firmware V 1.20.2.r3 ????

                                          1 Reply Last reply Reply Quote 0
                                          • K Offline
                                            kjm @bouchard.claude
                                            last edited by

                                            @bouchard-claude My 40uA deepsleep is just the gpy, does not include any current drawn by an expansion board.

                                            B 1 Reply Last reply Reply Quote 0

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