The JSN-SR04T-V3.3 ultrasonic distance measuring module provides non-contact distance sensing capabilities ranging from 23cm to 500cm, with a measurement accuracy of up to 3mm, Blind area is 20cm.
The module consists of an integrated ultrasonic sensor and control circuit.
The default is pulse width output, It has a good performance and almost the same usage of HC-SR04 module.
Please note that the device is waterproof, but it couldn't work underwater.
This module has 4 working modes to choose from, and customers can switch or experiment according to their actual needs.
Mode 0: Mode no welding=trigger pulse width output (factory default mode)
Mode 1: M1 shorted for automatic serial port output
Mode 2: M2 shorted for serial port controlled output
Mode 3: M3 shorted for switch output
(Mode soldered to 47K = Mode 1, Mode soldered to 120K = Mode 2, Mode soldered to 470K = Mode 3)
Note: The above can only work in one mode, and cannot be short-circuited or welded to a resistor at the same time.

Specification:
Working voltage: DC 3-5.5V
Working current: less than 8mA
Probe frequency: 40KHz
Maximum range: 500cm
Minimum range: 23cm
Long-range accuracy: ±1cm
Resolution: 1mm
Measurement angle: 75 degrees
Input trigger signal:
1. TTL pulse longer than 10uS
2. Send command 0X55 via serial port
Output echo signal:
Output pulse width level signal, or TTL
Size: L42*W29*H12mm
Operating temperature: -20°C to +70°C
Product color: PCB board is blue

Wiring method:
3-5.5V (power supply positive)
Trig (control terminal) RX
Echo (output terminal) TX
GND (power supply negative)

Product Features:
1. Small size and easy to use;
2. Low voltage and low power consumption;
3. High measurement accuracy;
4. strong anti-jamming;
5. Integrated sealed waterproof probe with cable, suitable for humid and harsh measurement environments.

Product Applications:
1. Horizontal distance measurement;
2. Obstacle avoidance and automatic control;
3. Object proximity and presence detection;
4. Traffic control;
5. Security and industrial control;
6. Artificial intelligence and education and research.