How to downgrade firmware

[ninjatill]

When OS v0.8.0.rc27 came out we were experiencing some SOS+10 faults which were caused by calling mesh functions without the mesh network being ready. Maybe this thread will help:

[Workaround identified] Xenon flashing red 10 times after rc.27 upgrade

I just updated my mesh network (1 Argon on Ethernet + 2 Xenons) to test out rc.27 in terms of mesh range and reliability. Running the Marco-Polo code by ninjatill I upgraded the Argon with no issues and then moved onto the Xenons. Upgrading to rc.27 I observed that after flashing Polo the device would immediately enter a panic state blinking red 10 times between 2 SOS patterns. If I flashed tinker onto the Xenon it will behave normally but the Polo code causes the error on both of my Xenons whet…