data from analog device ir sensor

[ps_anu]

Hi ...

how to get the data from analog sensor and pass via ble app

Thanks&Regards 

pspavi

[Jagbir]

In the SAADC example your ADC output should be Vdd * 284.44 on putty terminal. For the nRF52840-DK, the Vdd is 3.0 V.You can measure the output of IR sensor in volts using a multi-meter and that value multiplied by 284.44 should be your output on the terminal.You need to connect the output of of your sensor to P.0.02 on the DK.

[ps_anu]

yes I have tried by connecting it a gnd .

1) If i am connecting to a gnd i am getting the values in the range of 260 - 280 

2) without gnd connection i am getting the values in the range of 830 - 900 

Thanks & Regards,

pspavi

above pic with ground connection

without ground connection , output values 

[Jagbir]

1)Looks like a hardware connection issue to me. Ensure that the the IR sensor and DK share a common ground.Check other connections too. Your jumper settings are different from DK.

2) What is the output of your IR sensor.It should not exceed 3V(Vdd). Multiply the multi-meter output by 284, the output of this multiplication should be displayed on the terminal(assuming dc output of the sensor).