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==== 1st Step: Read the temperature value from Arduino and pass it to 'imp' device ==== | ==== 1st Step: Read the temperature value from Arduino and pass it to 'imp' device ==== | ||
− | The DHT11 temperature sensor is very easy to use but it is not "compatible" with the imp HW due to the proprietary protocol of the sensor. Additionally, it runs at 5V while the imp works at 3.3V. electricImp recommends using an intermediate micro (arduino) to read the temperature and then forward the reading to the imp through a serial connection [http://forums.electricimp.com/discussion/comment/7224#Comment_7224] | + | The DHT11 temperature sensor is very easy to use but it is not "compatible" with the imp HW due to the proprietary protocol of the sensor. Additionally, it runs at 5V while the 'imp' works at 3.3V. electricImp recommends using an intermediate micro (arduino) to read the temperature and then forward the reading to the imp through a serial connection [http://forums.electricimp.com/discussion/comment/7224#Comment_7224] |
The temperature is read from Arduino using a library and sketch written by Rob Tilliart [http://arduino-info.wikispaces.com/DHT11-Humidity-TempSensor]. The link describes how to install and use the [http://arduino-info.wikispaces.com/file/view/DHT11.zip/390039522/DHT11.zip library] from Arduino IDE. | The temperature is read from Arduino using a library and sketch written by Rob Tilliart [http://arduino-info.wikispaces.com/DHT11-Humidity-TempSensor]. The link describes how to install and use the [http://arduino-info.wikispaces.com/file/view/DHT11.zip/390039522/DHT11.zip library] from Arduino IDE. | ||
− | '''Note:''' The DHT11 sensor shown in the previous link has four PINs | + | '''Note:''' The DHT11 sensor shown in the previous link has four PINs on the bottom. However the PCB mounted version sold by DealeXtreme [http://dx.com/p/arduino-digital-temperature-humidity-sensor-module-121350] has only 3 PINs. The following picture describes the function of each PIN: |
[[File:DHT11.jpg]] | [[File:DHT11.jpg]] |