how to choose the slave address

[ps_anu]

hi.......

how to choose the slave address for peripheral device ?

i am using nrf52382 and segger version 15.2

because i want to pass the address in twi sensor

guide me

[Susheel Nuguru]

It would help a bit if you could tell us what address your TWI slave has. Maybe attach the spec for the slave device for others to understand what kind of addressing mode it responds to.

[ps_anu]

 Hi... susheel ,I need to send the data over ble using i2c ..  slave device is temperature sensor ...I dono how to choose the slave address.. there are different combination 

[Susheel Nuguru]

ps_anu said:

slave device is temperature sensor

 your temperature sensor will come with its product specification for its model version, which will tell you the exact slave address that needs to be used and how to interact with it (command/response interface). 

[ps_anu]

but  there are different combination ... using  scl..sda..vcc  ... i dono how to select 

SEE THE SAMPLE like  this in my datasheet

 A0   A1     A2

scl   sda   vcc    90h 

gnd  sda   vcc    80h 

gnd  scl   sda   a3h

[Susheel Nuguru]

I am not sure what you have pasted here. I think you need some help to understand how you the TWI standard works and you also need to understand how you can use it to interact with sensors before trying to find the API from our side to interact with the slave.

In your data sheet for the temperature sensor you should have very detail info on how to communicate with the sensor. Which temperature sensor are you using. Can you give the sensor name and model number for the IC?

[ps_anu]

max30205 .... temperature 

[Susheel Nuguru]

We always recommend you to search the forum first. This sensor has been widely used along with Nordic chip and there are some source codes using it with Nordic chip. Please read this thread and see how they initialize the sensor.