Important: Spresense Website Migration Announcement. Click for more details
The Spresense project website will be migrated to a new domain under Sony Semiconductor Solutions on January 16, 2026. The new website URL will be announced at a later date. Please stay tuned for further updates.
Downloads for Spresense LTE Ext. Board
On this page you will find all information and the files related to the Spresense LTE Ext. board.
Download Firmware Updater Tool
Updater of the LTE firmware on the Spresense LTE Extension Board. The tool updates the firmware from RK_03_00_00_00_04121_001 to RK_03_00_00_22_13151_002.
In this update the following malfunctions have been fixed:
⁃ SMS may not be available in some cases.
⁃ TLS communication may not establish in some cases.
Please download the updater file according to your PC environment.
Resources
Which version do I have?
If you are unsure about the firmware version of your LTE Extension board, you can use this Arduino sketch to retrieve information about the modem. It will return both the IMEI and the Firmware version of your board.
Licenses and Source Codes
Find OSS license information and Source Codes for RK_03_00_00_22_13151_001 and RK_03_00_00_22_13151_002.
For RK_03_00_00_22_13151_001
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For RK_03_00_00_22_13151_002
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