Serial1 on Argon/Photon2 Causes SOS when begin(9600) called: begin(115200) is OK

Hardware
,
1

I am trying to use a GPS featherwing; I need to use the Serial1 interface.

The code (when called in the setup loop)

serial1.begin(9600)

causes the red SOS on both Photon2 and Argon and with 1.5.2 on the Argon and 5.7.0 on both.

I am now seeing there is some issue with Serial1 on this hardware. Anyone have any insights?

2

Curiously enough, no error with

serial1.begin(115200)

Sigh.

3

NEVERMIND; Looks like I had one of the resources reserved elsewhere, but did not realize it.

4

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