http://www.sketching-with-hardware.org/wiki/index.php?action=history&feed=atom&title=Team14_barometric_pressure_sensorTeam14 barometric pressure sensor - Revision history2026-05-02T23:05:23ZRevision history for this page on the wikiMediaWiki 1.45.3http://www.sketching-with-hardware.org/wiki/index.php?title=Team14_barometric_pressure_sensor&diff=1187&oldid=prev62.216.214.31: Created page with "= PIM472 BME280 Temperature, Pressure, & Humidity Sensor = The BME280 is a sensor from Bosch used for measuring the temperature, air pressure and humidity. It is a nice enviro..."2022-10-12T21:52:27Z<p>Created page with "= PIM472 BME280 Temperature, Pressure, & Humidity Sensor = The BME280 is a sensor from Bosch used for measuring the temperature, air pressure and humidity. It is a nice enviro..."</p>
<p><b>New page</b></p><div>= PIM472 BME280 Temperature, Pressure, & Humidity Sensor =<br />
The BME280 is a sensor from Bosch used for measuring the temperature, air pressure and humidity. It is a nice environmental sensor for indoors or even outdoors in a suitable enclosure. The breakout board is compatible with 3.3 or 5 operating supply voltage and uses an I2C interface. This makes the sensor compatible for operating using any model of Raspberry Pi or Arduino microcontroller.<br />
* '''Pressure:''' range of 300 to 1100 hPa, sensitivity error ±0.25%, RMS Noise 0.2Pa<br />
* '''Temperature:''' range of -40 to 85°C <br />
* '''Humidity:''' accuracy tolerance ±3% relative humidity<br />
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== Technical Specifications ==<br />
If you’re using a Raspberry Pi, you can solder the PIM472 onto the bottom left 5 pins on your Raspberry Pi's GPIO header (pins 1, 3, 5, 6, 9).<br />
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===Pinout===<br />
* '''2-6V''' - Power supply, compatible with 3.3V and 5V<br />
* '''SDA''' - Serial Data Input: I2C communication<br />
* '''SCL''' - Serial Clock Input: I2C communication<br />
* '''GND''' - Ground<br />
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== Advantages and Disadvantages ==<br />
<br />
=== Advantages ===<br />
* Three sensors in one<br />
* Many uses for mobile applications and wearables: health monitoring (heat stroke and dehydration warning, lung volume ), weather forecast, indoor and outdoor navigation, control of heating, ventilation, air conditioning (HVAC) systems, sports and leisure<br />
* I2C and SPI bus interface<br />
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=== Disadvantages ===<br />
* Price (~16€) high if you don’t need all three sensor functions<br />
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= Getting the BME280 to work =<br />
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== Wiring with Wemos D1 Mini ==<br />
* Connect 2-6V to power supply (3.3V or 5V) - we use 5V<br />
* Connect SDA to any I2C data SDA pin - GPIO4 (D2)<br />
* Connect SCL to any I2C data SCL pin - GPIO5 (D1)<br />
* Connect GND to ground - G<br />
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== Required Library ==<br />
* Download and save this code as '''[https://github.com/RuiSantosdotme/ESP-MicroPython/blob/master/code/WiFi/HTTP_Client_IFTTT_BME280/BME280.py BME280.py]''' <br />
* Upload the code to the microcontroller<br />
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== Code Example ==<br />
<syntaxhighlight lang="python" line='line'><br />
<br />
# import modules<br />
from time import sleep<br />
from machine import Pin, I2C<br />
import BME280<br />
<br />
# Initialise the BME280<br />
sda = Pin(4)<br />
scl = Pin(5)<br />
i2c = machine.I2C(sda=sda, scl=scl)<br />
bme280 = BME280.BME280(i2c=i2c)<br />
<br />
# Print out temperature, air pressure and humidity values<br />
while True:<br />
temperature = bme280.temperature<br />
pressure = bme280.pressure<br />
humidity = bme280.humidity<br />
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print('Temperature: ', temperature)<br />
print('Air pressure: ', pressure)<br />
print('Humidity: ', humidity)<br />
print("----------------------")<br />
<br />
sleep(2)<br />
<br />
<br />
</syntaxhighlight><br />
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== Instructional Video ==</div>62.216.214.31