Arduino and Ultrasonic sensor JSN-SR04T

1

If I wish to configure JSN-SR04T for mode 3 (check the snapshot):

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image941×551 106 KB

I’ve initialized this using the following:
Serial1.begin(9600, SERIAL_8N1, SENSOR_RX, SENSOR_TX);

Where SENSOR_RX and SENSOR_TX are 22 and 4.

I should send a value to 0x55 (85 in DEC) to the RX port, so I use this:
Serial1.write(85);
And from there, I should get a value from port TX, using this:
Serial1.read();

But it seems I can’t send anything to the shield. Does anyone has any idea on this?

Thanks in advance!

2

Which board are you using? Can you show the platformio.ini file and the full code? Serial1 is only available on certain boards.

And am I correctly assuming that you have already soldered a resistor to the R27 pads?

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