Wio LTE Library Examples on a Wio LTE Cat M1/NB-IoT Tracker


I am trying to run the SMSSend example from the Wio LTE Library on a Wio
LTE Cat M1/NB-IoT Tracker, which I got this as part of Twilio’s Alfa Dev
Kit. However, when I read the serial output, it just says that there was a
network error and that the message was unable to send.

The network LED on the board is blue and I also confirmed that commands
sent from my SIM were received on the Twilio dashboard so I am confident
that my device is connected to the network. I tried using my own phone
number and that didn’t work. I bought a number from Twilio (1-808-201-4010)
and that also failed. Any help in figuring out how to send and receive SMS
messages on this board would be greatly appreciated.

The code for the SendSMS.ino file was from this library:

Any help is greatly appreciated, thank you!



We use the SRA-r410m-02b, it requires a special sim card.

Even the narrow band sim card, some only supports the network, without sms/voice function. Some includes the networkd/sms/voice functions.

Please check with Twilio if the sim card supports sms. thanks.


best rgds

The program was printing out the “Network Error” message, so there was
something wrong before it even tried to send an SMS. Is this because the
Wio NB-IoT Tracker wasn’t meant to work with the regular Wio LTE Library?

Hi Ying

Please try https://github.com/Seeed-Studio/WioLTE_Cat_NB1_Arduino_Library, let us know if any issue. Thanks

best rgds