It seems that Sigfox boards for Spresense have recently been released.
Sorry for the delay, but it seems that this has been verified to work with the Presense.
https://www.smk.co.jp/products/EM-WF931-02F/
I am in charge of SPRESENSE support for Sony.
I will reply to your inquiry.
Unfortunately, we have not verified the combination with Sigfox Shield for Arduino.
Thank you for your cooperation.
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