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All things pertaining to wireless and RF links
By alim
#192788
Hello,
I bought bluetooth silver mate from sparkfun. I used the instructions from following link:
https://learn.sparkfun.com/tutorials/us ... 1400889417
Everything works fine when I use pro mini 5V (16 MHz), however if I use pro min 3.3V (8MHz), nothing works. I know bluetooth module works from 3.3V to 5V. I changed VCC to 3.8V, still does not work.

Anyone has any suggestions?