Author Topic: wiring RFM69HW + Arduino Uno  (Read 16632 times)


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Re: wiring RFM69HW + Arduino Uno
« Reply #15 on: February 26, 2014, 03:50:48 PM »
Hello Sirocco,
I'm hoping a blog post I just posted (and actually is ongoing):  will help you better understand using an Arduino Uno with an RFM69HW.  There are two issues that I ran into:
1) the Arduino digital out pins use 5V to indicate HIGH/LOW whereas the RFM69HW uses 3.3V (explained in more detail in the blog post - see level shifting)
2) the RFM69HW has a pin spacing (pitch) of 2mm - more the spacing of a PCB than a breadboard, which has a spacing of 2.54mm.

Both can be overcome.  For example, I soldered wires to an RFM69HW and put in voltage dividers on the breadboard (to address the 5V -> 3.3V challenge) I am moving on to create a breakout board.


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Re: wiring RFM69HW + Arduino Uno
« Reply #16 on: February 27, 2014, 01:19:34 PM »
uChip has created a breakout board for the RFM69W that you can order from Oshpark,330.msg1794.html#msg1794, see for details.  You can populate it to work on either 3.3V or 5V.  I was going to cobble something up but decided his boards were a better solution, looks like it should work with either the RFM69W or the RFM69HW. I've received the boards but unfortunately haven't had the time to play with them yet :(


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Re: wiring RFM69HW + Arduino Uno
« Reply #17 on: February 28, 2014, 04:07:10 AM »
Hi, sketchy.
Thank you for the reply. I a part of your post. It gave me a little bit light in the darkness, but not enough for wiring of uno and RFM69HW. Could you write here just by a few sentences that, which pins should be connected, and where should the voltage regulator put? I dont have time to learn carefully these devices, because the boss gave me a lot of devices to test. So it would be great if you just wrote for me only connections. After that i will just upload sketch and test it.
Thank you for attention.