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BMP280 Barometric Pressure and Altitude Sensor I2C/SPI Module is a cheapest and tiny Atmospheric Sensor Breakout to measure barometric pressure
Good for 0-50°C temperature readings ±2°C accuracy
RS485 output signal
1 A Hall Resolution Basic 7 PPR × 150 = 1050 PPR Gear Reduction Ratio 1:150 Encoder Specifications Type AB Dual-Phase Incremental Magnetic Hall Encoder Line Rate Basic pulse 7 PPR x Gear reduction ratio Power Supply DC 3
Fingerprint Reader Sensor Module 3.7v BMP280 Barometric Pressure and AltitudeModule via a serial communication interface, directly with 3. 3V or 5V power microcontroller communication: Module data transmission feet (2 Foot TD) connected to the data bit machine receiving end (RXD), data receiver module feet (3 feet RD) connected to the data sender bit machine (TXD). For the RS 232 level (for example: PC machine) for PC communication, increase the level conversion between the module and the host computer Circuitry (e. g.: MAX232
