Hi all

Im trying to get my dronecell up and running.

i have connected the cell through TX0/RX0 Ardunio 2560. Serial connections is working.

It respons to my AT command, but during startup it throwing CPIN NOT DETECTED.

I belive it not sensing the sim card.



+CFUN: 1



Tryed to remove the sim pin, and also with diffrent working sim cards. 

Also tryed with several diffrent power supply.

I measured the SIM_VDD with my fluke, and during startup i got 1,1v. 

However im not sure if my voltmeter is able to sense the peak correctly, due to short periode of time the VDD is powered.

It should be 1,8v / 3,0v / 5..0v depends on wich sim card im using.

Im using the latest Firm..

Any help would be great. 

Im running out of options.....



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  • Are you talking about diabling the sim detection? What specific AT code are you referring to?
  • Good to hear from you Marc

    This issue must be either a manufacturing fault or similar.

    Have we let the honchos at DIYDrones / the store know? 

    They've always been super helpful in the past.


  • Hey Guys,

    i have 2 drone cell boards and have exactly the same problem have tried with 4 different operator sim cards with no luck at all, i have contacted the manufacturer narobo no answer from them either 

  • Hi

    I'm no expert either - but I'm having the same issue. I'm now powering the Dronecell via an ESC. I have a thought it is to do with the gate closing and making a connection when the sim is inserted - in fact during fiddling with this I managed to startup and get :


    but haven't managed to reproduce this again :(

    Keep at it an let me know how you get on....



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