MOD-BME280 precise Humidity, Temperature and Pressure sensor Open Source Hardware module with UEXT and Breadboard connector

MOD-BME-u

BME280 is digital humidity, temperature and pressure sensor with I2C and SPI interface.

You can see on this link comparison of different Humidity sensors

The operating conditions are:

  • Temperature -40..+85C;
  • Humidity 0…100 % Rh;
  • Pressure 300…1100 hPa  (+9000m..-500m above sea level);

The sensor works on 3.3V and is with very low power consumption 0,1..3,6 uA.

The easiest way to connect MOD-BME280 is with UEXT connector to any board with UEXT connector as shown on the picture above.

For boards which has no UEXT connector MOD-BME280 can be connected via four jumper wires on breadboard:

MOD-BME280-b

The KiCad files are uploaded on GitHub.

The demo software use Adafruit BME280 libraries with two small modifications. The default address in MOD-BME280 is 0x76 while Adafruit library is set to 0x77.

UEXT connector requires D8 to be set LOW to power and 10 ms delay to settle the power before addressing the sensor. The code is at GitHub.

When you run it you will see this:

Screenshot from 2018-03-27 14-35-38

The sensor is very precise, if you move board up and down you can see altitude changes. The 171 meter is the altitude of Olimex building.

MOD-BME280 is perfect for IoT application for environmental conditions logging due to the low power consumption and precise measurements. It can be used both for indoor and outdoor applications.

New Product in stock: MOD-BMP085 digital barometric pressure sensor

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MOD-BMP085 is new Open Source Hardware Digital Barometric pressure sensor breakboard. It comes with UEXT connector and cable so you can connect it to any of our development boards which have UEXT connector, but if you want you can use it also with breadboard as all BMP085 signals are available in two rows at 0.1″  step on the two sides of the PCB.

BMP085 allow you to measure pressure in range 300..1100hPa which corresponds to +9000m .. -500m above sea level.

The board is in stock and cost EUR 9.95

Demo code for OLinuXino in C and Python and for Arduino are available on our web, the Eagle CAD files and schematic is also there.

Cuff-less portable Blood pressure sensor

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via CNX-SOFTWARE

Nihon University have developed a tiny blood pressure monitor, which you can just touch with your finger, in order to get maximum and minimum (systolic and diastolic) blood pressures,  both average and real-time values, as well as pulse rate and pulse waveform displayed on your smartphone.

Announcement for this method of blood pressure measurement was done at Medica 2012 in Germany.

The innovation is that blood pressure is measured just with LED emitter and receiver using “Phase Shift Method”. Read the original article at http://techon.nikkeibp.co.jp/english/NEWS_EN/20131121/317741/

DuinoMite Project: Interfacing Real Time Clock DS1307 and Interfacing BMP85 temperature / pressure

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Mathias Johansson just posted two new projects made with DuinoMite on KSD forum:

DS1307 RTC interfacing and BMP085 temperature and pressure sensor interfacing