Reset module after mode change - some require power cycle for protocol recognition.
Tonny12138 2024-07-11 00:52:47 54 Views0 Replies Why can't the host machine software recognize the module after switching to IIC or I/O mode? How to switch between different communication modes?
2025-07-24 15:02:03 
icon to enter the serial port debugging assistant, change the baud rate to the baud rate you set before (if the baud rate has not been modified, it is 921600), select the COM port corresponding to the USB to TTL module and then click 
connect button to connect the COM port (in most cases, it will connect automatically), enter 54 20 00 ff 00 ff ff ff ff 00 ff ff 00 10 0e ff ff ff ff ff ff ff ff ff ff ff 00 ff ff ff ff 7c in the single send text box, change the send interval to 20ms in the timed send bar at the bottom right, and then check timed send. 
At this point, connect the GND of the USB to TTL module to the GND pin of the TOF module, the module will switch to UART mode and start outputting data, at this point uncheck the timed send button, then unplug the USB to TTL module and repower the module, then click the 
identify button on the main page to identify the module.If the switch fails, unplug the USB to TTL module and repeat the whole process. Do not unplug and plug the GND pin multiple times while sending commands. If the module can be recognized normally but the serial port output data is abnormal, you can manually change to UART mode in the setting page. Tonny12138
Currently, the host machine software only supports the recognition of modules in UART mode. In UART mode, you can configure the module as IIC or I/O communication mode by entering the setting page after successfully recognizing the module on the host machine; in IIC communication mode, you can switch back to UART or I/O mode by sending commands to the module through IIC communication according to the IIC communication protocol; in addition, you can switch back to UART mode in the following ways without IIC test environment or after switching to I/O mode:
Users need to prepare a USB to TTL module that supports a baud rate of 921600 (CP2102 is recommended) and install the corresponding driver program. Connect the TX, RX, and 5V three wires of the USB to TTL module to the corresponding pins of the TOF module, and do not connect the GND pin for the time being. Then plug the USB to TTL module into the computer.Open the host machine software, click icon to enter the serial port debugging assistant, change the baud rate to the baud rate you set before (if the baud rate has not been modified, it is 921600), select the COM port corresponding to the USB to TTL module and then click connect button to connect the COM port (in most cases, it will connect automatically), enter 54 20 00 ff 00 ff ff ff ff 00 ff ff 00 10 0e ff ff ff ff ff ff ff ff ff ff ff 00 ff ff ff ff 7c in the single send text box, change the send interval to 20ms in the timed send bar at the bottom right, and then check timed send. At this point, connect the GND of the USB to TTL module to the GND pin of the TOF module, the module will switch to UART mode and start outputting data, at this point uncheck the timed send button, then unplug the USB to TTL module and repower the module, then click the identify button on the main page to identify the module.If the switch fails, unplug the USB to TTL module and repeat the whole process. Do not unplug and plug the GND pin multiple times while sending commands. If the module can be recognized normally but the serial port output data is abnormal, you can manually change to UART mode in the setting page. Tonny12138 
