04-27-2020, 09:14 AM
Hi,
As promised I have done a phyphox program for two SensorTag sensors: Humidity and Pressure. Both provide temperature measurements. After the specification of the humidity sensor (HDC1000 of Texas Instruments) it can measure the temperature (T1) from -40°C to + 125°C, but in reality it starts to have problems below about -10°C (see the corresponding screen capture). The temperature (T2) given by the pressure sensor (BMP280 from Bosch Sensortec, full accuracy temperature range from 0°C to 65°C) after my correction of the initial phyphox program has no anomalies by passing to negative temperatures. T1 and T2 are close, but temperature estimated from the pressure (pV = nRT, V=const) is changing faster.
As promised I have done a phyphox program for two SensorTag sensors: Humidity and Pressure. Both provide temperature measurements. After the specification of the humidity sensor (HDC1000 of Texas Instruments) it can measure the temperature (T1) from -40°C to + 125°C, but in reality it starts to have problems below about -10°C (see the corresponding screen capture). The temperature (T2) given by the pressure sensor (BMP280 from Bosch Sensortec, full accuracy temperature range from 0°C to 65°C) after my correction of the initial phyphox program has no anomalies by passing to negative temperatures. T1 and T2 are close, but temperature estimated from the pressure (pV = nRT, V=const) is changing faster.