Here is the pin mapping for the Module Air:
| GPIO | devices | notes |
|---|---|---|
| GPIO0 | 📶 lora RESET | must be LOW to enter boot mode |
| GPI01 | TX | USB Serial |
| GPIO2 | unused | Inboard LED |
| GPIO3 | RX | USB Serial |
| GPIO4 | 💡Matrix C | notes |
| GPIO5 | 📶 lora NSS | notes |
| GPIO6 | 🛑 | integrated SPI flash |
| GPIO7 | 🛑 | integrated SPI flash |
| GPIO8 | 🛑 | integrated SPI flash |
| GPIO9 | 🛑 | integrated SPI flash |
| GPIO10 | 🛑 | integrated SPI flash |
| GPIO11 | 🛑 | integrated SPI flash |
| GPIO12 | 💡Matrix D | notes |
| GPIO13 | 💡Matrix R0 | notes |
| GPIO14 | 💡Matrix CLK | notes |
| GPIO15 | 💡Matrix E | notes |
| GPIO16 | 💡Matrix OE | notes |
| GPIO17 | 💡Matrix A | notes |
| GPIO18 | 📶 lora SCK | notes |
| GPIO19 | 📶 lora MISO | notes |
| GPIO21 | SDA | notes |
| GPIO22 | SCL | notes |
| GPIO23 | 📶 lora MOSI | notes |
| GPIO25 | 💡Matrix STB/LAT | notes |
| GPIO26 | 📶 lora DIO0 | notes |
| GPIO27 | ♨ CO2 RX | notes |
| GPIO32 | NextPM RX | notes |
| GPIO33 | 💡Matrix B | notes |
| GPIO34 | 📶 lora DIO2 | notes |
| GPIO35 | 📶 lora DIO1 | notes |
| GPIO36 | ♨ CO2 TX | notes |
| GPIO39 | NextPM TX | notes |