If you are familiar with Arduino boards, the Button Size Node is an Arduino Pro-Mini with on-board HopeRF RFM69-CW/HCW 433/868/915 MHz radio, external EPROM flash, and a crypto authentication chip. To reduce the board dimensions the Button Size Node does not have an onboard USB-Serial converter. You need to buy FTDI Adapter for programming. The HopeRF RFM69-CW/HCW provides an extremely good range. Hundreds of meters in open areas. An external flash chip allows burning Arduino sketch wirelessly. The onboard Atmel ATSHA204A CryptoAuthentication chip secures communication with other controllers.
Some IOT ideas based on the switch node and similar controllers plus complete specs you may find here my my GitHub page
Best suitable for Home Automation, IOT. Could be used as core board for controlling any DIY project. You may think of it as Arduino Pro Mini plus all the items in the picture below:
RFM69 Versions to choose from
|A0, A1||Available ARDUINO analog GPIO / DIGITAL GPIO|
|A6||Connected to Battery voltage sensor (via divider)|
|A4||Connected to si1132 and bh1750 SDA|
|A5||Connected to si1132 and bh1750 SCL|
|A3||Connected to ATSHA204A|
|D3, D4, D5, D6, D7, D9||Available ARDUINO digital GPIO|
|D8||Connected to CS FLASH chip (OTA) M25P40|
|MISO, MOSI, SCK, RST||Connected to ISP header|
|Bat+||Unregulated power up to 6.5 Volts|
|Scissors line||you cat cut with scissors, sensors and battery holder part if you need just controller and radio|
Arduino IDE Settings
|Shipping Rate||First item||Additional items|
Bpost: Standard Ground Rate
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Dev in the past. Now mostly in retail automation, IOT and China sourcing. Love hardware, PCB's and coding. The modules in the store created together with friend of mine [Koresh](https://www.openhardware.io/user/143)