Hello, Thank you for your response. To answer you: 1.How many BME680 have you tested, and how many BME680 have encountered the issues you reported? Tens of them are currently mounted and running but only one (the first time) followed this temperature/humidity testing serie. Then, we stopped because we did not want to disrupt more units before knowing more. 2.What is the value of the data register you read when the pressure sensor is not working? "4294944.888" after library function conversion but I suspect it returns 0xFFFFFFFF. 3.When you test, did the BME680 power on or off before you read temperature, humidity, pressure sensor data? No, it keeps on being powered all the time. Periodic reading are done more or less every 30 seconds. Temperature and humidity keeps on working without issue. 4.What is the temperature step and interval time for temperature adjustment when the temperature slowly drops from 70 °C to -20 °C? I am sorry do not have in hand the exact protocol but according to our real time readings we log, it is about 1H30 to go from 70°C down to -20°C. Best regards Thierry
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