@jpavlik it will be great if you could yse one of the newer firmware 6542 sensors for tests with the P1 driver.
Please update the driver manually to the latest version "2.1.5" time stamp "2026/06/09 10:28 PM" :
- Added FP300 Time-cluster Read Attributes handling through the Hubitat zigbeeLogsocket WebSocket;
- replies now echo the exact request ZCL transaction sequence number.
Many thanks to @hubitrep for the zigbeeLogsocket idea!