QAV400 wrote:well some time ago (not to long) TC said that most BT modules will work, so....
From my understanding a ttl signal can be anything up to the vcc voltage of the transmitting device so it could be 3.0v or 5.0v etc
So should we only be running bt modules that can use a 3v VCC and use 3v pad to power it only so as to not have the ttl signal be no higher than 3 or 3.3v etc?
correct me if wrong here guys.
Also no where have i read that one must only have a 3v ttl signal for the rx pin in the middle of naze board so how was i to know......
Mystery solved!
What was sold to me as a 3v BT module was actually 4.6v. I didn't measure it when I got it, and it worked, so I figured it was good. Apparently, 4.6v is only enough to kill it if you have USB plugged in before BT and FC on, 'cause that's the order that killed the micro.
There's all kinds of BT units out there. Some have 3v power, some have 5v, but the power doesn't necessarily indicate the serial level.
Anybody thinking about a BT module- measure the serial lines BEFORE you connect it, regardless of the power/serial levels stated when purchased.