u-blox SARA R410

This guide shows how to bring up a u-blox SARA R410 on Hologram with a global IoT SIM, then optionally send data to Hologram Cloud.

How do I set up the SARA R410?

Insert SIM and power the device

Insert the SIM per the device diagram, attach antenna, and power on. Connect to the module’s AT port via serial.

Verify AT access

AT
OK

Check firmware version

ATI
Manufacturer: u-blox
Model: SARA-R410
Revision: L0.0.00.00.05.08

Caution: If revision is older than 05.08, update firmware for improved TCP performance.

Configure profile and bands

Always set CFUN=0 (radio off) before changing profiles/bands.

AT+CFUN=0
OK
AT+UMNOPROF=100
OK
AT+CFUN=15  // reboot

Reopen serial, then:

AT+CFUN=0
OK
AT+UBANDMASK=0,185473183
OK
AT+UBANDMASK=1,923806
OK
AT+CFUN=15  // reboot

Note: Use the default/undefined UBANDMASK per the u-blox AT manual for your variant to allow full band scanning.

Set APN and operator selection

AT+CGDCONT=1,"IP","hologram"
OK
AT+COPS=0
OK

Optional: Create TCP socket to Hologram Cloud

AT+USOCR=6
OK
AT+USOCO=0,"cloudsocket.hologram.io",9999
OK

Optional: Send a message via Embedded API

Set hex mode and write payload { "k": "DEVICE_KEY", "d": "Hello", "t": "topic" } as hex with its byte length.

AT+UDCONF=1,1
OK
AT+USOWR=0,[LEN],[HEX_PAYLOAD]
OK
AT+UDCONF=1,0
OK
AT+USOCL=0
OK