Core2: Flash Firmware & Run Code

1. USB Driver Installation

Click the links below to download the driver package that matches your operating system. There are currently two driver chip versions: CP210X (for the CP2104 version) and CP34X (for the CH9102 version). After extracting the package, select the installer that matches your OS bitness. If you are not sure which USB chip your device uses, you can install both drivers. CH9102_VCP_SER_MacOS v1.7 may report an error during installation, but it has actually been installed and can be ignored. If programs cannot be downloaded normally during use (for example, timeout or Failed to write to target RAM), try reinstalling the device driver.

2. Flash UiFlow2 Firmware

1. Refer to the UiFlow2 Web IDE Tutorial to learn the basic workflow of UiFlow2 and install the M5Burner firmware flashing tool.
2. Download the firmware for Core2 in M5Burner, as shown below.

3. Connect the device to the computer with a USB cable. After the device powers on, plug in the USB port to enter download mode. When M5Burner displays Found New Device, the connection is successful. At this point, the device screen remains blank and the device enters programming mode.

4. In M5Burner, click the Burn button for the corresponding firmware, select the device port, and click Start.

5. Enter the Wi-Fi configuration that the device needs to connect to, including Wi-Fi SSID and Wi-Fi Password, as well as any other device configuration that needs to be added or modified. Then click Next to start flashing.

Configuration information:

• COM: Select the serial port corresponding to the device
• BaudRate: Baud rate for serial communication
• Server: Server address the device connects to
• WIFI SSID/WIFI Password: Wi-Fi name and password used by the device
• SNTP Server:
  • SNTP0: Alibaba Cloud NTP Server (China)
  • SNTP1: Japan NTP server pool
  • SNTP2: Global public NTP server pool
• Timezone: Time zone setting
• Boot Option: Set the device boot mode after firmware flashing
  • Run main.py directly: After flashing, directly run the program in main.py without connecting to the network or displaying the UiFlow2 startup screen
  • Show startup menu and network setup: The device connects to the network, and devices with screens display the UiFlow2 startup screen
  • Only network setup: The device only connects to the network and does not display the UiFlow2 startup screen
• Power Supply Mode:
  • USB input power
  • Grove output power

6. When Burn successfully, click here to return is displayed, the firmware has been flashed successfully.

7. After firmware flashing is complete, if you need to modify the device configuration, keep the USB connection, restart the device, and click Configure. Follow the on-screen prompts to make changes.

3. Device Connection

The device supports connecting to UiFlow2 via Access Code (wireless network) or USB (wired connection to a computer) for program upload and debugging. Refer to the following steps:

Access Code Wireless Connection

1. Before connecting, use the Wi-Fi icon on the screen to make sure the device is connected to the network. If the network connection fails, check whether the Wi-Fi name and password entered when flashing the firmware are correct, modify them through the Configure option in M5Burner, and flash again.

2. Check the currently generated valid Access Code on the device's UiFlow2 startup screen.

3. Visit uiflow2.m5stack.com to open the UiFlow2 Web IDE.
4. Click Select Your Controller (shown on first entry) or the Controller button on the page to enter the Select Device page.

5. Click Connect Device, enter the access code and a custom device name, then click Confirm to connect Core2 to UiFlow2.

6. Select the connected Core2 device on the Select Device page, then click Confirm to enter the UiFlow2 programming interface.

USB Wired Connection

1. Visit uiflow2.m5stack.com to open the UiFlow2 Web IDE, and connect Core2 to the computer with a USB cable.
2. Click Select Your Controller (shown on first entry) or the Controller button on the page to enter the Select Device page.

3. Select the Core2 device in the device list, then click Confirm.

4. Click the WebTerminal button. In the pop-up window, select the serial port of Core2, then click Connect.

When the WebTerminal screen displays Connected to Serial Port!, the USB connection is successful.

4. Program Run and Download

After the device is connected to UiFlow2, you can drag Blockly blocks to edit programs.

After editing the program, click the Run Once button in the lower-right corner to run the test program once, or click Run Always to download the program to the device.

You can also run once or download the program in the WebTerminal window.

5. Related Links

• UiFlow2 Blockly Introduction
• UiFlow2 Firmware Source Code

Built-in Peripheral Development

• Screen
• Speaker
• Button
• MIC
• SDCard

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