Ultrasonic Range Finder - HRXL-MaxSonar-WR

[jimpower]

I am trying to read output from the serial pin of the MaxSonar WR series ultrasonic sensor datasheet.

I have connected via Max3232 Breakout using the below connections

this is my output

b'\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e\x18\xe6\x00\xf8\x188\xf8\x98\x1e'

I then tried with a transistor 2N7000 connected like this

and it prints none

Has anyone had any experience with using these sensors at all?

[jimpower]

@jcaron My diagram is incorrect sorry, however I tried a new max3232 today and managed to get it to work.

Thanks

[jcaron]

@jimpower Have you checked https://forum.pycom.io/topic/1901/uart-reading-serial-stream-escape-sequences/17 ?

I believe your transistor's wiring does not match the one described in that thread.