For some modules, if no flashing tool is purchased, you can solder wires for flashing by yourself.
You can also purchase a 3.3V serial port board from other channels.
Note: If you use a Wi-Fi and Bluetooth combo module, Wi-Fi module, or BP series module, a serial port board is required. If you use a ZT or BT series module, a serial port board and a Telink writer are required. If you use a ZS or TYZS series module, a USB-to-TTL serial port and a J-Link writer are required.
Install the software and click TYMZ 3.0.
Import the production credential to Cloud Module 3.0