How do I set up communication between the "Seeeduino Xiao" and the "Adafruit Bluefruit LE UART Friend - Bluetooth Low Energy (BLE)"?
Nevermind, I figured it out. For anyone that has this problem to:
First, use the &quot;blueart_cmdmode&quot; example file. Then, follow these steps:
HOW TO GET THE SEEEDUINO XIAO TO WORK WITH THIS

Make sure the &quot;Adafruit_BluefruitLE_UART ble(Serial1, BLUEFRUIT_UART_MODE_PIN);&quot;
line of text above the &quot;void error&quot; line is UNCOMMENTED. Everything else in that
block is to still be commented.

Define the pins in &quot;BluefruitConfig.h&quot; as such:
#define BLUEFRUIT_SWUART_RXD_PIN       6    // Required for software serial!
#define BLUEFRUIT_SWUART_TXD_PIN       7    // Required for software serial!
#define BLUEFRUIT_UART_CTS_PIN         0    // Required for software serial!
#define BLUEFRUIT_UART_RTS_PIN         -1   // Optional, set to -1 if unused

Wire the pins as defined above.

Make sure the Bluefruit is switched to &quot;CMD&quot; mode.