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iot_lora_v3
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Created by Wijnand on 2018-04-26 12:58:11

Description: This design (a RFM95W controlled by an Arduino Pro Mini) was my first step in the world of IoT.

The board is tested with the examples of the Matthijs Kooijman
LMIC library and works perfect.

It's also used in the IoT workshop
LoraWAN Grundlagen
of the iot-usergroup.de.

A second set of PCB designs (power supply/sensor boards) are planned as piggyback/hat for this
iot_lora board. Power alternatives will be: solar cell, CR2032, 2 x AAA, supercap, TPS61291,
TPL5111 and/or TPS22860.

BOM
1 x RFM95w/868MHz
1 x Arduino Pro mini
2 x 10K (I2C pull up)
1 x SMA antenna connector
1 x pin header 2x7

ATTENTION: The update to V2.0: ADC6 and ADC7 (analog exclusively) are not connected
to JP3 anymore but PB0 and PB1 (possibility for soft serial). The HF part has now a switch to SMA
or spring antenna and added are GND planes on both sides.

ATTENTION: The update to V3.0: (on request) added a JST PH 2mm power connector
(for RAW and VCC) and a silkscreen update.

License: CC-BY 4.0
Project URL: http://alf4all.demon.nl/engineering/topics/digital_system_design/targets/Arduino-Pro-Mini_RFM95/index.htm
Board Revision: V3.0
Tags: iot, lora, rfm95, arduino pro mini

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Board Images:

Top View - Complete Board

Top View - Complete Board

This is what your finished board will look like from the top.

Bottom View - Complete Board

Bottom View - Complete Board

This is what your finished board will look like from the bottom.

Board Outline

Board Outline

This shows the outline of your board, it will be cut to this shape.

Top Copper Layer

Top Copper Layer

This shows where the copper will remain after etching the top of the board.

Bottom Copper Layer

Bottom Copper Layer

This shows where the copper will remain after etching the bottom of the board. (mirrored)

Top Soldermask

Top Soldermask

This shows where soldermask will be applied on the top over the bare copper board.

Bottom Soldermask

Bottom Soldermask

This shows where soldermask will be applied on the bottom over the bare copper board. (mirrored)

Top Silkscreen

Top Silkscreen

This is the white print that will be printed on the top of the board.

Bottom Silkscreen

Bottom Silkscreen

This is the white print that will be printed on the bottom of the board. (mirrored)

Drill Holes

Drill Holes

This shows all the holes that will be drilled in your board.