The SparkFun LTE CAT M1/NB-IoT Shield with Hologram SIM Card equips your Arduino or Arduino-compatible microcontroller with access to data networks across the globe without needing to provide your own subscriber identity module. This shield adds wireless, high-bandwidth cellular functionality to your IoT project while maintaining low power consumption and a small footprint. The SparkFun LTE CAT M1/NB-IoT Shield is based off the Arduino R3’s footprint that allows you to easily incorporate it with favorite Arduino-based device.
At the heart of the LTE Cat M1/NB-IoT shield is a u-blox SARA-R410M-02B LTE Cat M1/NB-IoT modem. Cat M1 (Category M1) and NB-IoT (Narrowband IoT) are both Low Power Wide Area Network (LPWAN) technologies that are designed to provide cellular communication to small IoT devices. They operate on LTE network bands just like most smartphones, and should be supported by most cellular network carriers. The u-blox SARA-R4 module communicates over a UART via a simple AT command set. We’ve provided a library to help you get started with everything from sending SMS text messages to communicating with servers over a TCP/IP connection. Additionally, both the module and library support an I2C GPS interface via a Qwiic connector, so you can plug in a u-blox GPS module and start remotely tracking your project.
Each SparkFun LTE CAT M1/NB-IoT Shield also includes a ceramic, Molex 1462000001 SMD antenna. The antenna has a gain of 3.8dBi around 1.7GHz to 2.7GHz. However, if you would prefer to use an external antenna, we have provided a U.FL connector that can be utilized by simply slicing through a jumper with a hobby knife.
Please be aware that you will need to supply and solder on your own headers before attaching it to your Arduino based device. Also, if you already have your own SIM, we also offer this shield without a card included.
Note: Be sure to check the Hardware Overview section in the Hookup Guide for compatible GPS modules. The onboard Qwiic connector is only designed to support u-blox-based GPS modules. It does not support any other GPS modules or sensors. We are continuing to add more modules so be sure to check back every so often to find out more!
The Hologram enhanced eUICC SIM card [ e.g. CEL-17117 ] will work with SparkFun LTE CAT M1/NB-IoT Shield - SARA-R4 [ e.g. CEL-14997 ] but the special eUICC features will not be operable with the shield at this current time.
If you need further assistance with these key features please visit the Hologram support forum:
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SIM card must be obtained here: https://marketplace.att.com/products?tags=connectivity
I selected the LTE-M US plan for my project. The Register Operator example Arduino script works, setting network operator to MNO_ATT and APN to m2m.com.attz
This connects to the AT&T IoT cloud, for more information look here: https://m2x.att.com
I can get the LTE shield to receive messages from the Hologram cloud (Hologram Dashboard) but cannot send outgoing messages - either to Hologram or to a cell phone via SMS. The latter may be due to issues with Verizon and not the shield, but the former seems to be a different issue. Other purchasers appear to be having similar problems. I've posted details on this on the Sparkfun forum at https://forum.sparkfun.com/viewtopic.php?f=115&t=50640&p=207355&hilit=LTE#p207355 At this point, I've run out of ideas to try after spending several days trying to get things to work. Hopefully I can get some help on the forum and will have reason upgrade my rating of "bad".
I bought it to do text messaging. Would not work.
You do need to enable text messaging on your Hologram account before you can send a text and I believe to do that Hologram requires an additional fee to send text (SMS) messages. Check your Hologram account for details on how to add texting to your SIM card.
Got this kit with the Hologram SIM, activated fine and all. I was able to send SMS, but none of the Hologram send/receive example sketches were working. Digging into the AT commands, querying the device firmware with "ATI9" showed an old firmware version on the module (L0.0.00.00.05.06 / A.02.01 flashed in Feb 2018).
I contacted UBlox via their "support portal" and requested the EasyFlash software tool and new firmware, which they sent in a few hours. In order to flash from EasyFlash you must use the USB interface, which requires soldering the usb_sel jumper on the bottom, and desoldering after flash is complete. Checked new firmware version with "ATI9" again. New firmware version is L0.0.00.00.05.08 / A.02.04).
New firmware seemed to improve connectivity issues, Hologram send/receive sketches now work great, on to greater things
oh wait, one more, the newer firmware seems to default to Power Save Mode on. After 12 seconds of idle (no AT commands) the blue light turns off and the modem no longer responds to AT commands on the UART... to turn off power save, "AT+CPSMS=0"
I bought this module to replace the 2G unit I was using. So far this module has been nothing but problems. None of the Sparkfun code examples worked. Product support has been poor. After days of searching and reading other peoples issues I found out the module had old firmware. u-blox wants only to support companies it sells to, and not the end customer. They did however do me a favor a provided a link so I could update firmware. After that I was at least able to connect to the Hologram cloud, however even that is not 100%. In my opinion Sparkfun should be providing more support, and also links to update firmware after we buy their products. I will probably and up finding a different module because this one is just not reliable enough for the project I am building. So not happy at all and hope I can get my money back.