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The product is intended for specialists and requires qualified and authorized personnel. The product does not include assembly/use instructions . Putting the product into operation by unqualified persons leads to the loss of the warranty according to the Terms and Conditions on the site.
The specified technical parameters (current, power, etc.) represent maximum allowable values under ideal operating conditions. For safe use and optimal lifespan, it is recommended to operate the product continuously at no more than 50% of the specified maximum values.
BMP280 atmospheric pressure, temperature sensor, 3.3V
The module for precise measurement of atmospheric pressure and ambient temperature in low-power projects, operates at 3.3V and is ideal for weather stations, altimeters and environmental monitoring. It offers I2C or SPI communication, good reading stability, compact size and excellent compatibility with Arduino, ESP32 and other development boards.
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Bosch BMP280-based atmospheric pressure and temperature sensor module, compatible with 3.3V development boards, designed for accurate and stable measurements in electronic applications. The sensor measures atmospheric pressure and ambient temperature (does not measure humidity), offers I2C and SPI communication, low power consumption, compact size and excellent compatibility with Arduino, ESP32 and other development boards.
The module operates at 3.3V logic level, allows I2C address selection via the SDO pin (by default it is connected to the internal pull-up resistor) and can be used directly in I2C mode without connecting the CSB pin, due to the default configuration of the board.
For SPI communication, the module changes the pin assignments, SCL becomes SPI clock, SDA becomes MOSI, SDO becomes MISO and CSB becomes Chip Select. An essential condition for SPI for the BMP280 to operate in SPI mode, the CSB pin must be connected to a GPIO pin of the board and controlled from the code (CSB must be pulled LOW to select the sensor). If CSB remains HIGH, the sensor enters I2C mode.
Specifications:
Model: BMP280
Supply voltage: 1.8 – 3.3 VDC
Logic voltage: 3.3 V
Communication interface: I2C up to 3.4 MHz
Communication interface: SPI up to 10 MHz
Default I2C address: 0x76
Alternative I2C address: 0x77 via SDO pin pulled LOW
Temperature range: -40C to +85C
Temperature resolution: 0.01C
Temperature accuracy: ±1C
Atmospheric pressure range: 300 – 1100 hPa
Pressure resolution: 0.18 Pa
Pressure accuracy: ±1 Pa
Dimensions mm: 12 x 15.5mm
Use:
Attention! We recommend using a logic level converter if used with 5V boards!
The module connects to the development board using the I2C or SPI interface, depending on the application.
In I2C mode, the CSB pin does not need to be connected, as it is already internally pulled HIGH, which automatically enables I2C communication. Only VCC, GND, SDA and SCL connections are required.
The default I2C address is 0x76, and if the sensor is not detected on the bus, it can be changed to 0x77 by connecting the SDO pin to 3.3V. For quick testing and configuration, it is recommended to use example 2 from the Sparkfun library, the one dedicated to selecting the I2C address. ESP32 works natively at 3.3V and does not require a logic level converter, but for 5V development boards it is mandatory to use a logic level converter to protect the sensor.
SPI connection can be useful when it is necessary to use multiple sensors, without limiting I2C addresses.
Pinout with ESP32:
I2C:
| BMP280 | ESP32 | Description |
|---|---|---|
| VCC | 3V3 | 3.3V power supply |
| GND | GND | Mass |
| SDA | GPIO 21 | I2C data line |
| SCL | GPIO 22 | I2C clock line |
| CSB | OFFLINE | I2C mode active by default |
| SDO | not connected or 3V3 | I2C address selection (0x76 not connected, 0x77 connected to 3V3) |
SPI:
| BMP280 | ESP32 | Description |
|---|---|---|
| VCC | 3V3 | feeding |
| GND | GND | Mass |
| SCL | GPIO 18 | SCK SPI |
| SDA | GPIO 23 | DAWDLE |
| SDO | GPIO 19 | MISO |
| CSB | GPIO 5 | Chip Select |
Produs destinat utilizarii in proiecte electronice, automatizari, prototipare, educatie si cercetare.
Produsul trebuie utilizat numai conform specificatiilor tehnice mentionate in descriere si/sau in documentatia produsului.
Avertismente generale de siguranta:
Nu utilizati produsul la tensiuni, curenti sau temperaturi peste valorile specificate.
Montajul si conectarea trebuie realizate de persoane cu cunostinte tehnice minime in domeniul electric/electronic.
Evitati scurtcircuitele, inversarea polaritatii si conectarea gresita a alimentarii.
Nu lasati produsul alimentat nesupravegheat in timpul testelor.
Produsul nu este jucarie si nu este destinat copiilor.
Pentru modulele electronice, se recomanda utilizarea in carcase, panouri sau montaje protejate, dupa caz.
Identificare produs:
Denumirea produsului, codul/SKU-ul si caracteristicile tehnice sunt mentionate in pagina produsului si/sau pe eticheta ambalajului.
Producator / Importator / Distribuitor:
Sigmanortec S.R.L.
Calea Bucuresti nr. 9, Targu Jiu, Gorj, Romania
E-mail: [email protected]
Website: www.sigmanortec.ro
Persoana responsabila in UE:
Sigmanortec S.R.L.
Calea Bucuresti nr. 9, Targu Jiu, Gorj, Romania
E-mail: [email protected]
Documentatie si siguranta:
Pentru informatii suplimentare, fise tehnice, declaratii de conformitate sau instructiuni, ne puteti contacta la [email protected].
Reviews (5) - Review moderation
Este, poate, cel mai folosit senzor de presiune atmosferica. Atensie, procesorul trebuie sa faca niate calcule ca sa afle presiunea exacta.
Mic , de calitate
Multumit.
Adresa I2C se poate modifica si la initializare prin begin(), nu este necesara modificarea bibiliotecii: _i2c = new TwoWire(0). // I2C 1 _i2c->begin(pin_sda, pin_scl, (uint32_t)100000). // pentru suprascriere porturi SDA si SCL pentru I2C 1 _bmp = new Adafruit_BMP280(_i2c). // _bmp->begin(BMP280_ADDRESS). // pentru 0x77 _bmp->begin(BMP280_ADDRESS_ALT). // pentru 0x76
Este un produs bun, masoara corect, dar doar temperatura si altitudinea, nu masoara si umiditatea. Umiditate, presiune si temperatura masoara BME280. BMP280 doar temperatura si presiune atmosferica.
