====== Building up an Environment Sensor (SMD Version) ======

===== Needed Parts and PCB =====

You need a **PCB**. You may use the layout from [[https://github.com/breaker27/smarthomatic/tree/master/hardware/generic_micro_2|Github]] and etch it yourself or [[https://www.smarthomatic.org/shop/|order]] the PCB or a complete kit.

The envsensor using the SMD version powered with a CR2032 battery is designed to power only sensors with small power consumption or when the measuring cycle is big. For example, a CR2032 is good if you use the devise as window sensor. If your sensors need more power, you should use a bigger 3V battery or 2 AA(A) alcaline cells.

==== Partlist (in buildup order) ====

^  Amount  ^               Part                        ^  Placing    ^             Picture                   ^
|    1     | PCB Generic Micro 2                       |             |  {{ parts:pcb_micro_2.jpg }}          |
|    1     | IC ATMega328 TQFP                         | IC1         |                                       |
|    1     | Capacitor 10µF 6V SMD                     | C1          |                                       |
|    1     | Resistor 560R SMD 603                     | R1          |                                       |
|    1     | Resistor 4K7 SMD 603                      | R9          |                                       |
|    3     | Resistor 10K SMD 603                      | R6, R7, R8  |                                       |
|    1     | Resistor 100K SMD 603                     | R5          |                                       |
|    1     | Resistor 1M SMD 603                       | R4          |                                       |
|    1     | LED 2mA                                   | LED1        |                                       |
|    1     | Connector AVR Mini ISP 6pin 1.27mm pitch  | JP1         |                                       |
|    1     | Connector 2,54mm pitch                    | JP2, JP3, JP8, JP9, JP11, JP14 |                    |
|    1     | Battery Holder CR2032                     | BAT         |                                       |
|    1     | Battery CR2032                            | BAT         |                                       |
|    1     | Transceiver PCB RFM12B                    | IC2         |                                       |
|    1     | Antenna 82,2mm                            | JP4         |                                       |


maybe extra pins, at your opinion.

===== Buildup of PCB =====

{{https://raw.github.com/breaker27/smarthomatic/develop/hardware/generic_micro_2/placing.png?500}}

//(Image directly loaded from external GitHub source. If it doesn't work, fix link in wiki!)//

===== Connecting Sensors =====

Please read about it in the description of the [[env_sensor|Generic Midi (THT technology)]] description.