Nooploop TOFSense-F - I;O Output Mode; I;O Output Configuration

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I/O Output

Figure 3: Configuration diagram for IIC output mode

I/O Output

In I/O output mode, the module cannot output distance values. The two signal lines have opposite

levels, and the level of the I/O port is inverted only when the distance changes from small to large and

exceeds the high threshold value, or when it changes from large to small and falls below the low

threshold value.

When the module is in UART mode (note that NAssistant cannot recognize modules in I/O mode),

TOFSense-F series products can be connected to the NAssistant software via a USB to TTL module

(referring to the data manual for wiring and power voltage). After successful identification, click to

enter the setting page . First, set the hysteresis starting point 'Band_Start' and the hysteresis width

'Bandwidth' to determine the hysteresis interval. The configuration diagram for I/O output mode is

shown in Figure 4. The distance value is converted to a high or low level output by hysteresis

comparison, and the TX/SCL and RX/SDA outputs are complementary. The hysteresis comparison

schematic is shown in Figure 5. After configuring the parameters, you need to click the 'Write

Parameters' button to save the parameters.

Note: After switching to I/O mode, if you need to change parameters such as Band_Start and

Bandwidth, you can refer to the FAQ section to switch back to UART mode and then configure the

parameters.

For example, if Band_Start and Bandwidth are set to 500 (unit: mm), the low threshold value is

0.5 meters, and the high threshold value is 1 meter. When the ranging value is 0.3 meters, RX is high

level and TX is low level. When the ranging value increases to 0.8 meters, RX is high and TX is low.

When the ranging value exceeds 1 meter, the level is reversed, RX is low, and TX is high. When the

ranging value drops from more than 1 meter to 0.8 meters, RX is low and TX is high, and when the

ranging value drops below 0.5 meters, the level is reversed, RX is high, and TX is low.

If only one threshold value is needed, Bandwidth can be set to 0. Also note that the high level

output by the module is 3.3V, and the output current is small. When driving other devices, be sure to

check if it can be driven. If it cannot be directly driven, you can use a relay or other methods to drive it.