Small telescope Flexible Spectrograph One.
Check out the documentation:
The later Rpi 4's are based on BCM2835 processor, and uses the PL011 UARTs.
RPi 4 UART and Device Assignments| UART | RX Pin (Board) | Tx Pin (Board) | Comm Port | Conflicts |
|---|---|---|---|---|
| uart0 | GPIO 14 8 | GPIO 15 10 | /dev/ttyAMA0 | Serial Console |
| uart1 | GPIO 0 27 | GPIO 1 28 | /dev/ttyAMA1 | |
| uart2 | GPIO 4 7 | GPIO 5 29 | /dev/ttyAMA2 | I2C |
| uart3 | GPIO 8 24 | GPIO 9 21 | /dev/ttyAMA3 | |
| uart4 | GPIO 12 32 | GPIO 13 33 | /dev/ttyAMA4 | SPI0 |
| uart5 | GPIO 12 14 | GPIO 13 15 | /dev/ttyAMA5 | gpio fan |
# Enabling I2C3, with SDA on GPIO4 and SCL on GPIO5 dtoverlay=i2c3,pins_4_5
V0.0 - pre-release placeholder.