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@@ -32,6 +32,43 @@ looking down, Pin1 is top left, Pin40 bottom right
```
Note that the spare onboard LED (activity?) is on `PD18`
## 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
#### MQ Pro