Basic ambient temperature and humidity sensor

Manuel Fegerl 15/04/2019

Component list

1
Breadboard (z.B. 400 Pin)
1
NodeMCU Amica v2 (Bridge)
1
1,3 Zoll I2C OLED Display
1
DHT11 Sensor
1
Jumper wires

Introduction

No special technical skills or tools are required for this project. The result of this project is a fully functional broadboard with an integrated sensor and a display for displaying temperature and humidity data of the DHT11 Sensor.

The components are supplied with power via a micro-USB connection and can then be configured and used with the Sense App.

Best used with

Quick configure with

No tools or skills needed


Connecting the bridge to the breadboard

Take the broadboard and bridge as shown and put the bridge on the red marked skirting boards. Please make sure that the USB port of the bridge is pointing downwards. The bridge must then be plugged into the pins labeled as follows:

– Left pin header: a: 16 to 30
– Right pin header: h: 16 to 30


Connect sensor module to breadboard

In this step, the sensor for temperature and humidity is connected to the broadboard. The 3 pins are connected to j: 2 to 4. Make sure that the board is on the right and the pins on the left.


Connect the display to the breadboard

Now the display follows. The display will use the same cable for the positive voltage of the power supply (VC) as the sensor, therefore it shares row 4 with the sensor. The display must be aligned so that the pins are on the right. These are then plugged into the socket strips g: 4 to 7.


Connect sensor module with bridge

Here the sensor is connected to the bridge. This supplies the sensor with power and connects it to the data pin D4 of the bridge. For this a cable is plugged in as follows:

i: 2 to j: 22 (corresponds to label GND on bridge)
i: 3 on j: 20 (corresponds to label D4 on Bridge)
i: 4 on j: 21 (corresponds to label 3.3V on bridge)


Connect display to bridge

Since the display was already powered in the last step, only the data lines connected to D1 and D2 of the bridge are missing for the display. To do this, plug in one cable at a time as follows:

i: 6 to j: 17 (corresponds to label D1 on bridge)
i: 7 on j: 18 (corresponds to label D2 on Bridge)
i: 5 on i: 22 (corresponds to GND label on bridge)


Result

If your microcontroller (bridge) has not yet been loaded with the Sensate firmware, follow these instructions. Once this is done, the unit is fully functional and can now be used with the Sense App. Have fun!

To protect the components from dust and dirt, we recommend the installation in a plastic housing. This is possible even with little skill and equipment. Just have a look at our intermediate skill tutorial.