As an added note to @jensck_particle 's response, if you are having difficulty upgrading over OTA, you can refer to the upgrade methods here at [Updated 12/12] Particle Mesh Known Issues and Fixes
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As an added note to @jensck_particle 's response, if you are having difficulty upgrading over OTA, you can refer to the upgrade methods here at [Updated 12/12] Particle Mesh Known Issues and Fixes