| .. _mcp9808-sample: |
| |
| MCP9808 Temperature Sensor |
| ########################## |
| |
| Overview |
| ******** |
| |
| Sample application that periodically reads temperature from the MCP9808 sensor. |
| |
| |
| Requirements |
| ************ |
| |
| The MCP9808 digital temperature sensor converts temperatures between -20 |deg| |
| C and +100 |deg| C to a digital word with |plusminus| 0.5 |deg| C (max.) |
| accuracy. It is I2C compatible and |
| supports up to 16 devices on the bus. We do not require pullup resistors on the |
| data or clock signals as they are already installed on the breakout board. |
| |
| The MCP9808 is available in a discrete component form but it is much easier to |
| use it mounted on a breakout board. We used the Adafruit breakout board. |
| |
| - `MCP9808 Sensor`_ |
| |
| This sample uses the sensor APIs and the provided driver for the MCP9808 sensor. |
| |
| Wiring |
| ******* |
| |
| The MCP9808 requires 2 wires for the I2C bus plus power and ground. The power |
| can be either 5V or 3.3V. |
| |
| We connect the Data and clock wires to Analog ports A4 and A5 which is the I2C |
| pins on Arduino compatible boards. |
| |
| In this hookup we are only connecting one device to one of the supported boards. |
| It reads the temperature and displays it on the console. |
| |
| |
| References |
| *********** |
| |
| - http://www.microchip.com/wwwproducts/en/en556182 |
| |
| |
| .. _`MCP9808 Sensor`: https://www.adafruit.com/product/1782 |
