nRF51 dongle Arduino / ATmega AVR with TWI ANT

[erltot]

I have a few nRF51 dongles I wish to use with ANT+ for wireless mesh communication between some robots. I want to connect each to one ATmega 1284p and another Arduino Mega with ATmega 2560, both 5v chips. Can I connect them directly to the GPIO edge pins to interface with TWI or will it destroy the nRF chip?

Edit; www.nordicsemi.com/.../nRF51-Dongle

[awneil]

If you connect the TWI (I2C) pullups to the nRF51 3V supply, that should be OK - so long as nothing on the Arduino is pulling-up to 5V...

[erltot]

Excellent, I am just starting with the nordic chips now, but have some arduino and avr experience. Just to clarify - I am correct to assume that I can use the available GPIO pins on this dongle as twi as well then and that I can use the ant stack to communicate between my robots? Can I also use one dongle on my computer to communicate through UART to a server application? If this is somehow very complicated i'd like to know before I dig into this :-) Thank you for your replies so far.