MOD to Pin 12 - Bluefruit LE UART

[bcavanagh]

Hi,
I have made a great attempt at reviewing the customer support forums as suggested on the website.
I’m still lost about the ‘MOD’ pin (Pin 1 below). I am not certain what it is used for and if I should tie it high / low / float or be toggling it with the Beaglebone Black I plan to use.
Can someone point me in a direction or send a note about how to work with this pin?

Thanks,

Brian

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[adafruit_support_mike]

That's the MODE pin.

The BLE module's firmware operates in one of two modes: COMMAND mode, where you send it commands and it does things like setting data values or configuring the BLE connection, and DATA mode, where it just shoots data back and forth without trying to interpret it.

The Pinout page of the tutorial explains how to use it:

https://learn.adafruit.com/introducing- ... nd/pinouts

[bcavanagh]

Thank you Mike, that helped me out very much!

I would like to followup with one more question but with respect to the DFU pin if that's ok?
If you prefer I can post it separately for others to view and benefit as well.

I'm planning to use an OR' Gate that will be triggered by the Beaglebone Black unit as illustrated below.
I'm not certain if there is any unforeseen issues pulling DFU low by the OR' Gate. Can you provide some feedback?

Thanks,

Brian

[adafruit_support_mike]

That shoudn't cause any problems. The BLE UART Friend doesn't care where a signal comes from, just that the voltage levels are correct.