Error in establishing a connection between nRF52840 DK board and SHT21 sensor using TWI module.

[Ashu@2000]

I  am using the SHT21 sensor for measuring temperature and humidity, trying to connect it to nRF52840 DK Board using TWI mode.

I am unable to even scan and get the response from the SHT21 sensor.

Initially, I am trying to send a basic address that is 0x80 and just confirming whether the communication is getting established between SHT21 and nRF52840 DK board or not.

I am unable to get anything on RTT viewer.

[Ashu@2000]

I am using a Nordic TWI scanner.

The address of the IC is 7 bit that is 1000 000, last bit 1 - Write and 0 - Read.Sensirion_Humidity_Sensors_SHT21_Datasheet

If I try the TWI scanner program, the only thing that gets printed on RTT is:

TWI scanner started.

No device was found.

[awneil]

So the device is not giving an ACK.

How are you sure that your hardware is correct and working?

How are you sure that your software configuration is correct?

Which takes us back to the original questions:

awneil said:

Do you have correct pullups?

Have you used an oscilloscope or logic analyser to see what's happening on the wires?

[Ashu@2000]

sht21-i2c-temperature-and-humidity-sensor - is the module that I am using.

Regarding software of newly developed code, I can share all possible information on that.

[Ashu@2000]

So if possible then please do help me.

[Ashu@2000]

Hardware is completely working fine

[awneil]

Ashu@2000 said:

Hardware is completely working fine

How do you know that?

Again:

awneil said:

Have you used an oscilloscope or logic analyser to see what's happening on the wires