# LoRA HAT pins
This is derived from the schematics; showing the 5 specific pins used (only)

```text
looking down, Pin1 is top left, Pin40 bottom right

        3v3  -- o o -- 5v
                o o -- 5v
                o o -- GND
    AUX  ------ o o ------ TX (set to USB serial via jumpers on HAT)
         GND -- o o ------ RX (set to USB serial via jumpers on HAT)
             -- o o --
    M1   ------ o o -- GND
    M0   ------ o o --
         3v3 -- o o --
             -- o o -- GND
             -- o o --
             -- o o --
         GND -- o o --
             -- o o --
             -- o o -- GND
             -- o o --
             -- o o -- GND
             -- o o --
             -- o o --
         GND -- o o --

```
The three fixed pins used by the HAT are 7,13 and 15.
These map as follows:
* `AUX` is on `PB7`
* `M1` is on `PD22`
* `M0` is on `PB0`

The Serial (TX,RX) is deselected via onboard jumpers, a secondary serial will be jumpered to the module TX/RX instead.

## References
#### Lora HAT
https://www.waveshare.com/wiki/SX1262_868M_LoRa_HAT