Ultrasonic Sensor- JSN-SR04T

[Kavitha R]

We are facing some issues as well as we have some queries related to Ultrasonic sensor Module Integration with ESP32.

In JSN-SR04T, STM8S003F3P6 controller is used and 8 pulses of 40 kHz signal is generated from the controller & given to transmitting part of the circuit. The transmitting side Vpp voltage is nearly 96V when we use STM8S003F3P6. The maximum distance is 600 Cm.

We are trying to interface with ESP32 controller. We generated 8 pulses of 40Khz from ESP32 and we are getting 70V as Vpp. The only change is STM8S003F3P6 from JSN-SR04T is replaced by ESP32. We are getting 213 Cm as a maximum distance.

Please give me a suggestion on how to increase the sensor distance?

Thank you!

 

[FvM]

Not clear what you exactly did
- Copied JSN-SR04T design, probably with some modfications that affect performance
- Used original JSN-SR04T module, rewired the control signal to ESP32

If the circuit is identical, why did you get lower Tx level?