ESP32-C2-M1 WiFi Serial Transparent Transmission Module

You can configure the module via its built-in HTTP web server or AT commands. Power the module, connect to its default Access Point (AP) WiFi network, then open a browser to its IP address (typically 192.168.4.1). Alternatively, connect via a serial terminal (e.g., 115200 baud) and send AT commands like AT+CWMODE to set the WiFi mode (1=STA, 2=AP, 3=AP+STA) and AT+CWJAP to join a network. The web interface provides a more user-friendly way to set SSID, password, and serial parameters.

The default UART baud rate for the module's serial interface and AT command port is typically 115200 bps. You can change this rate via AT commands (e.g., AT+UART) or through the web configuration interface to match your host microcontroller's settings, supporting a range from 300 bps up to 921600 bps. Ensure your serial terminal or MCU code uses the same baud rate, data bits (8), stop bits (1), and parity (none) for reliable transparent data transmission between your device and the WiFi network.

Yes, the module supports Over-the-Air (OTA) firmware updates. You can upload a new firmware binary through the web interface under the OTA update section when the module is connected to a network. Alternatively, you can reprogram it via its serial bootloader using tools like esptool.py. Ensure you have a stable power supply and network connection during OTA updates. The pre-installed V3.0 transparent transmission firmware can be replaced with custom code developed in Arduino IDE or ESP-IDF, allowing full customization of its functionality.