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System thread causes macAddress function call in setup routine to fault with an SOS #1858

wvolz opened this issue Jul 16, 2019 · 0 comments · May be fixed by #1949


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@wvolz wvolz commented Jul 16, 2019

Bug Report

Calling Wifi.macAddress in the setup routine with the system thread enabled causes an instant SOS type 1 fault. If I move the function call below a waitUntil(Particle.connected); the fault goes away but I would like to obtain the MAC before the device is connected. I suspect there is a threading issue here. Maybe this is related to #1805?

Expected Behavior

Wifi.macAddress() should return the device MAC address when called in the setup routine.

Observed Behavior

Calling Wifi.macAddress() in the setup routine with the system thread enabled causes an SOS type 1.

Steps to Reproduce

Flash the test app below. Note: disabling the system_thread fixes the issue.

Test App


byte mac[6];

void setup() {

void loop() {



Maybe related to #1805

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