I am trying to use a SIM card from a TracFone and it is narrower than the slot of my mkr nb1500 board. The specs says to use a micro sim and that's what I think I have. Does anyone have advice?
Yes, you can either buy a nano-to-micro adapter, or just use the piece of plastic originally surrounding the SIM when you bought it (or from any other one). In this case, to make sure they're correctly aligned and to avoid inserting or extracting problems, you can use a small piece of adhesive tape on the back (not over the contacts...).
Thanks. I will do that.
I purchased a nano to micro adapter but it's still not working. I suspect I need an actual micro sim card so I have ordered one.
I never had problems with adapters (even using just an old plastic from another SIM). A SIM is a SIM, there's no difference at all between standard, micro and nano (except for the two optional pads), not used on nano). How did you determine the adapter is not working?
When you took that picture I hope you haven't tried to insert it inside the reader, maybe in the wrong order (especially because two of the contacts are GND and VCC) and the SIM may have been damaged.
Before buiyng a new one, have you checked the SIM functionality (using any smartphone)?
I'm a novice to this but it seems to me that a nano sim won't match up to the contacts for a micro board. My sim is functional because I took it out of a smartphone which I first tested.
I'm sorry to say you're wrong, you can't rely on your "feeling" unless you have specific information. Every SIM you buy during the last 10 years (maybe more) is supplied with breakable cuts to let the user choose the standard, mini, micro or nano:
The chip and the 6 pins are exactly the same (except for the two optional and unconnected pins you often see on 8 pins mini and micro SIMs).
If you don't believe me, I hope you believe Wikipedia...
I'm just grasping at straws to try to figure out why my 1500 NB isn't sending out text messages.
Hard to get it if you don't (properly) plug a SIM inside the socket...
One more information, the MKR 1500 specs says:
this board requires a SIM card from a compatible mobile carrier providing NB IoT service
I don't have that board, but IDK if the problem is just your mobile carrier more than the SIM adapter...
I got this SIM from a TracFone. It would have been nice if Arduino offered a turnkey solution which included a tried and tested SIM card at an extra cost.
I put my send back in my TracFone and sent a text to my phone and it worked correctly.
Tracfone blocks my access to their site (never seen that and I don't know why, maybe because I'm not in the US?) so I can't see more details abount their SIM, like the bands and standards accepted (is it a GSM anyway I guess sending an SMS isn't properly a NarrowBand IoT test...
But first of all double check what is stated in THIS page, to make sure you use a compatible SIM (not much about its form factor as the original question, but it's a SIM and carrier features/type matter). Go ahead with your tests only if you're sure the SIM you intend to use is compatible!
Sorry I can't help you more on this kind of test (as said, I never had to do with that board), but just get back to original question fist.
If you still have the adapter make sure it is correctly and firmly inserted, power up the MKR and tell us what you mean with "still not working": do you have a test sketch you use? And what is that sketch? What is its output? Are you sure the SIM has PIN security turned off?
Then try the same using another SIM (from your standard phone for example).
But don't just test it by sending just an SMS, check more about the SIM using some test code e.g. to test SIM features and parameters (usually listed using AT commands, IDK how on that MKR works and/or is implemented) like the IMEI number, the cell signal level, and so on.
If it works with your standard SIM the culprit is that TracFone one; if it doesn't, it could have something to do with some MKR 1500 requirements I don't know about, so you need to deeply investigate about that, and I can't do it for you more than that I have already done. Sorry.
If someone in the US has successfully sent a text message using this model board can you please supply me with the precise info about the SIM card so I can purchase one. Thank you.
This topic was automatically closed 180 days after the last reply. New replies are no longer allowed.