Arduino compatible board with ATmega 328P@3.3V at 16MHz / 8MHz.

• 24.4 x 32.8mm (0.96 x 1.29 in).
• RFM69W/HW as option.
• USB charging designed for 3.7 Li-Po or Li-On battery (500 - 2000mAh).
• Voltage measurement on A6 via 2:1 voltage divider.
• Charging state (Hi-Z) reported to pin D8.
• U.FL antenna connector matching footprint on back of PCB.
• Optionally high quaility 20cm U.FL to SMA pigtail.
• Optionally rubber SMA 868/915MHz antenna.

Programmable via standard FTDI programmer.

Buy one radio node mini, get one prototyping board free!

It is breadboard friendly and measures only 24.4 x 32.8mm (0.96 x 1.29 in). All available pins are taken out to board sides and marked as on Arduino board. It is 3V3 board and it is available with 16Mhz or 8Mhz quartz oscillator. As it is made to work with Li-Po or Li-On battery it features battery voltage measurement on A6 via 2:1 voltage divider, and also ability to detect charging state connected to pin D8. Pin D2 is not taken out as it will be used as interrupt pin for RFM69 by default. Board has also a possibility to assign pin D4 as reset for the RFM69 radio via solder jumper labeled RR. It is programmable via FTDI programmer. Note, that it is not designed to take power from micro USB without battery, the charger is providing only minimal current to the board (~20 mA) when it does not detect the battery. However FTDI programmer can be used also as power source while developing.

Board has excellent standby battery consumption within few uA when MCU and radio is asleep. It will last for months to year(s) depending on battery size and sleep conditions. Board is able to handle 500-2000mA battery.

868Mhz version can be used at 915Mhz by selecting proper frequency in software.