1. OUTLINE

The Unit C6L is an intelligent edge computing unit integrated with the M5Stack_Lora_C6 module. It features an Espressif ESP32-C6 SoC and Semtech SX1262 LoRa transceiver, engineered with a modular design for long-range, low-power LoRaWAN communication, high-speed 2.4 GHz Wi-Fi, and BLE connectivity. The unit includes a 0.66" SPI OLED display for real-time data visualization, a WS2812C addressable RGB LED for system-status indication, a built-in buzzer for audible alerts, and front-panel buttons (SYS_SW) with a reset switch for local interaction. A standard Grove I²C interface allows seamless integration with M5Stack hosts and various Grove sensors. The onboard USB Type-C port supports ESP32-C6 firmware programming, serial debugging, and 5 V power input, while automatic power switching and multi-channel ESD/surge protection ensure stable operation. The Unit C6L excels at real-time data acquisition, edge-intelligence processing, and remote control, making it ideal for IoT applications such as smart agriculture, environmental monitoring, industrial IoT, smart buildings, asset tracking, and urban infrastructure sensing.

1.1. Unit C6L

1. Communication Capabilities

• Integrated LoRa (Semtech SX1262), supporting LoRaWAN Class A/B/C and point-to-point modes
• 2.4 GHz Wi-Fi and BLE via ESP32-C6-MINI-1U

2. Processor & Performance

• Main Controller: Espressif ESP32-C6 (single-core RISC-V, up to 40 MHz)
• On-chip Memory: 512 KB SRAM with integrated ROM

3. Power & Energy Management

• Power Input: USB Type-C (5 V input) and Grove 5 V input

4. Display & Indicators

• 0.66" SPI OLED display for real-time data visualization and status monitoring
• WS2812C addressable RGB LED for system-status indication
• Built-in buzzer for audible alerts

5. Interfaces & Controls

• Grove I²C interface (with 5 V power) for seamless connection to M5Stack hosts and Grove sensors
• USB Type-C port for firmware programming, serial debugging, and power input
• Front-panel buttons (SYS_SW) and reset switch (MCU_RST) for local control

6. Expansion & Debug Pads

• Bootloader pad: predefined jumper pad for entering bootloader mode
• Test points (TP1-TP8) for signal probing and in-circuit debug

2. SPECIFICATIONS

2.1. Module Size

Diagram showing the physical dimensions of the Unit C6L module from multiple angles (front, side, top). Key dimensions are provided in millimeters (mm), indicating overall length (62mm), width (24mm), and details of mounting holes (Ø5mm, R3, R0.5).

3. FCC Warning

FCC Caution: Any Changes or modifications not expressly approved by the party responsible for compliance could void the user's authority to operate the equipment.

This device complies with part 15 of the FCC Rules. Operation is subject to the following two conditions: (1) This device may not cause harmful interference, and (2) this device must accept any interference received, including interference that may cause undesired operation.

IMPORTANT NOTE: Note: This equipment has been tested and found to comply with the limits for a Class B digital device, pursuant to part 15 of the FCC Rules. These limits are designed to provide reasonable protection against harmful interference in a residential installation. This equipment generates, uses and can radiate radio frequency energy and, if not installed and used in accordance with the instructions, may cause harmful interference to radio communications. However, there is no guarantee that interference will not occur in a particular installation. If this equipment does cause harmful interference to radio or television reception, which can be determined by turning the equipment off and on, the user is encouraged to try to correct the interference by one or more of the following measures:

• Reorient or relocate the receiving antenna.
• Increase the separation between the equipment and receiver.
• Connect the equipment into an outlet on a circuit different from that to which the receiver is connected.
• Consult the dealer or an experienced radio/TV technician for help.

FCC Radiation Exposure Statement: This equipment complies with FCC radiation exposure limits set forth for an uncontrolled environment. This equipment should be installed and operated with minimum distance 20cm between the radiator and your body.

4. Arduino Install

I. Installing Arduino IDE

Click to visit the Arduino official website (https://www.arduino.cc/en/Main/Software), and select the installation package for your operating system to download.

II. Installing Arduino Board Management

1. Board Manager URL

The Board Manager URL is used to index the development board information for a specific platform. In the Arduino IDE menu, select File > Preferences.

2. Copy ESP Board Management URL

Copy the ESP board management URL below into the Additional Board Manager URLs: field, and save.

https://espressif.github.io/arduino-esp32/package_esp32_dev_index.json

3. Install ESP Board Support

In the sidebar, select Board Manager, search for ESP, and click Install.

4. Install M5Stack Board Support

In the sidebar, select Board Manager, search for M5Stack, and click Install. Depending on the product used, select the corresponding development board under Tools > Board > M5Stack > {ESP32C6 DEV Module board}.

5. Connect Device

Connect the device to your computer with a data cable to upload the program.