How to Use codecell c3 light: Examples, Pinouts, and Specs

The CodeCell C3 Light, manufactured by Microbots.io, is a compact and versatile microcontroller module designed for IoT (Internet of Things) applications. It is based on the ESP32-C3 chip, which features a RISC-V single-core processor, integrated Wi-Fi, and Bluetooth Low Energy (BLE) capabilities. The module is optimized for low-power applications and is ideal for projects requiring wireless connectivity, such as smart home devices, wearables, and environmental monitoring systems.

Common applications and use cases include:

• IoT devices with Wi-Fi and BLE connectivity
• Low-power sensor nodes
• Home automation systems
• Wearable technology
• Prototyping and educational projects

The following are the key technical details of the CodeCell C3 Light:

The CodeCell C3 Light has a total of 11 GPIO pins, which can be configured for various functions. Below is the pinout description:

1. Powering the Module:

   • Use a USB-C cable to power the module with 5V. The onboard voltage regulator will step it down to 3.3V.
   • Alternatively, you can power the module directly via the 3V3 pin with a regulated 3.3V supply.

2. Programming the Module:

   • The CodeCell C3 Light is compatible with the Arduino IDE, PlatformIO, and ESP-IDF.
   • Install the necessary ESP32-C3 board support package in your development environment.
   • Connect the module to your computer via USB-C and select the appropriate COM port.

3. Connecting Peripherals:

   • Use the GPIO pins to connect sensors, actuators, or other peripherals. Refer to the pin configuration table for specific pin functions.

4. Example Circuit:

   • Connect an LED to GPIO2 with a 220-ohm resistor in series.
   • Use the following code to blink the LED.

// Example: Blink an LED connected to GPIO2 on the CodeCell C3 Light

#define LED_PIN 2  // Define the GPIO pin where the LED is connected

void setup() {
  pinMode(LED_PIN, OUTPUT);  // Set the LED pin as an output
}

void loop() {
  digitalWrite(LED_PIN, HIGH);  // Turn the LED on
  delay(1000);                  // Wait for 1 second
  digitalWrite(LED_PIN, LOW);   // Turn the LED off
  delay(1000);                  // Wait for 1 second
}

• Voltage Levels: Ensure that all connected peripherals operate at 3.3V logic levels to avoid damaging the module.
• Power Supply: Use a stable power source to prevent unexpected resets or malfunctions.
• GPIO Usage: Avoid using GPIO0 for peripherals unless necessary, as it is used for boot mode selection during programming.
• Firmware Updates: Regularly update the firmware to benefit from the latest features and bug fixes.

1. The module is not detected by the computer:

   • Ensure the USB-C cable is data-capable (not just for charging).
   • Check that the correct drivers for the ESP32-C3 are installed on your computer.

2. The module does not power on:

   • Verify the power supply voltage and connections.
   • Ensure the USB port or external power source is functioning correctly.

3. Unable to upload code:

   • Check that the correct COM port is selected in the Arduino IDE or other development environment.
   • Press and hold the BOOT button on the module while uploading the code.

4. Wi-Fi or BLE connectivity issues:

   • Ensure the module is within range of the Wi-Fi router or BLE device.
   • Verify that the correct SSID and password are used in the code.

Q: Can I use the CodeCell C3 Light with a 5V sensor?
A: No, the GPIO pins operate at 3.3V logic levels. Use a level shifter to interface with 5V sensors.

Q: What is the maximum current the 3V3 pin can supply?
A: The 3V3 pin can supply up to 500 mA, depending on the input power source.

Q: Is the module compatible with MicroPython?
A: Yes, the CodeCell C3 Light supports MicroPython. You can flash the MicroPython firmware to the module and use it for development.

Q: How do I reset the module?
A: Press the RESET button on the module to perform a hardware reset.

By following this documentation, you can effectively integrate the CodeCell C3 Light into your projects and troubleshoot common issues.