NOTE! ARF and Baro chips are now obsolete and replaced with the new plug in board coming Spring 2016!!
Please someone double check this for me, but here's a quick summary of pin-outs and connections in one place:
ARF
With the ARF face up (chips up) with the antenna connection at the top, pin 1 is the topmost pin on the left edge. Pin 2 is below that etc. with pin 10 the bottom-most on the same (left) edge.
PIN 1 3.3v IN - connect to any 3.3v output from Slice of POD / POD or Adafruit Baro chip VOUT, or Digole board 3.3v output.
PIN 2 TX - connect to GPIO pin 10 RX
PIN 3 RX - connect to GPIO pin 8 TX
PIN 10 GND - any GND on POD or GPIO (pins 6,9,14,20,25)
ADAFRUIT BARO
Vin 5v Connect to any 5v output from Slice of POD board or GPIO pin 2
GND Connect to any GND from GPIO (pins 6,9,14,20,25) or Slice of POD board etc
SDA Connect to SDA on GPIO pin 3
SCL Connect to SCL on GPIO pin 5
HOBBYTRONICS BARO
Vin 3v Connect to any 3.3v from Slice of POD or POD or Adafruit Baro chip or Digole board
GND Connect to any GND from GPIO (pins 6,9,14,20,25) or Slice of POD board etc
SDA Connect to SDA on GPIO pin 3
SCL Connect to SCL on GPIO pin 5
Notes
- GPIO 3.3v supply (pin 1) is NOT sufficiently powerful to use, hence the use of the POD or Digole boards.
- Take extra care with the GPIO pin numbering. It is not like regular IC numbering (down once side and up the other), instead even numbers are on one side, odd on the other.