Mysensors RFM69W Serial Gateway

Description:

This is a Mysensors serial GW using RFM69W radio module and CP2102 usb to serial converter.

Key features:

• USB to serial converter using CP2102 specialized IC
• ATSHA204A for signing
• MySensors ready(Atmega328p + RFM69W)

Work progress:

1. Test/verify the pcb board correctness(from both electrical and mechanical point of views) - DONE
2. Produce the initial PCB's using some external PCB manufacturer - DONE
3. Components assembly(soldering) - DONE
4. Upload Mysensors serial GW sketch code - DONE
5. Verify the real board with running code - DONE
6. Create project enclosure using a 3D printer - DONE

Instructions:

1. Burn MCU fuses using avrdude like this: avrdude -cusbasp -pm328p -U lfuse:w:0xff:m -U hfuse:w:0xde:m
2. Burn arduino serial bootloader using their IDE(select board Arduino Genuino/Uno -> Programmer: usbasp(or which one you have) -> Burn bootloader)
3. Upload serial gateway example sketch provided with this project(taken from Mysensors examples and adapted for this board)

Notes:

If experiencing instabilities please replace C10 & C13 caps with tantalum type ones(0805/R/P case type and rated at 10V)

HW Revisions:

• 0.1 - initial design
• 0.2 - fixed ceramic resonator pinout
• 0.3 - removed capacitor from reset switch as it can interfere with arduino serial bootloader if used
• 0.4 - added VUSB line filtering
• 0.5 - added USB lines termination resistors

Credits:

All credits go to MySensors team for the great work and to the opensource community