2. Check and confirm that the serial line used to connect the controller is a straight line, not a cross line.
3. Check and confirm that the serial connection cable is intact, and both ends are not loose or falling off.
4. Select the correct product model, correct transmission mode, correct serial number and correct baud rate according to the LED display control software and the control card you choose, and set the address bit and baud rate on the hardware of the control system correctly according to the dip switch diagram provided in the software.
5. Ensure that the hardware of the control system has been properly powered on. (+5V)
6. If it cannot be loaded after the above inspection and correction, please use a multimeter to measure whether the serial port of the connected computer or control system hardware is damaged. To confirm whether it should be returned to the computer manufacturer or control system hardware for testing.
Led display screen uses die-casting aluminum box to find Lin Rong Optoelectronics, and Lin Rong led box has high precision and high strength.