Have an nRF52832 "dev board" and a BME280 breakout board, where to start?

RE: Have an nRF52832 "dev board" and a BME280 breakout board, where to start?

haakonsh — Wed, 10 Jul 2019 12:58:22 GMT

I also suggest using a logic analyzer as it will show you what's actually going on the bus. It's the only proper way to learn how I2C/TWI works IMHO.

RE: Have an nRF52832 "dev board" and a BME280 breakout board, where to start?

awneil — Wed, 10 Jul 2019 11:34:38 GMT

[quote userid="76634" url="~/f/nordic-q-a/49561/have-an-nrf52832-dev-board-and-a-bme280-breakout-board-where-to-start/197605"]getting a proper dev kit would have been the wise decision[/quote]

You could still do it ....

I would suggest that it would be a good investment

RE: Have an nRF52832 "dev board" and a BME280 breakout board, where to start?

ANTALIFE — Wed, 10 Jul 2019 11:28:53 GMT

Most of my programming experience is with Arduino (so AVR's) but I have also been working with STM32's at work for the past year, so this is why I decided to make a project with the nRF52.

In terms of C experience I think I know enough to do basic stuff, though this is my second time trying to talk with a sensor over i2c, first was on the STM32 project.

Yea getting a proper dev kit would have been the wise decision. I know that my crude dev kit works so for now I will try and use the i2c/twi scanner example and see if I can pick up the sensor address. From that point will try and read a value from the ID register (like other people suggested)

RE: Have an nRF52832 "dev board" and a BME280 breakout board, where to start?

haakonsh — Wed, 10 Jul 2019 11:23:10 GMT

You will need to create the implementations for the BME280's user_i2c_read, user_i2c_write, and user_delay_ms functions.

The user_delay_ms function is easy as we already have one implementation of it in nrf_delay_ms() in nRF5_SDK_15.3\components\libraries\delay\nrf_delay.h.

The read function can be call to nrfx_twim_rx() and the write function a call to nrfx_twim_tx.

You should also initialize the TWIM driver before the BME280 driver.

RE: Have an nRF52832 "dev board" and a BME280 breakout board, where to start?

awneil — Wed, 10 Jul 2019 07:57:04 GMT

[quote userid="76634" url="~/f/nordic-q-a/49561/have-an-nrf52832-dev-board-and-a-bme280-breakout-board-where-to-start"]I am a newbie with the nRF52[/quote]

Do you have experience with any other microcontroller(s) ?

Do you have experience with programming in general? 'C' programming in particular?

I would strongly recommend that you get a Nordic Dev Kit - as that will give you documented, ready-to-go examples, and people here will know the board.

It will also be the target of all Nordic's tutorials, demos, etc.

It also has a built-in J-link to download & debug your code - which can also be used to download & debug external targets.

Once you have gained experience on the DK with the nRF product and the tools, then you will be in a position to move on to "custom" hardware...

Start here:

https://www.nordicsemi.com/Get-Started

https://devzone.nordicsemi.com/nordic/short-range-guides/b/getting-started/posts/introduction-to-bluetooth-low-energy-and-ble-devel

This does assume that you are already familiar with 'C' programming for embedded microcontrollers.

RE: Have an nRF52832 "dev board" and a BME280 breakout board, where to start?

Nguyen Hoan Hoang — Wed, 10 Jul 2019 06:44:48 GMT

The blog post have links to example source code for the BME280 and code to send data over BLE. The development environment is Eclipse GCC. There are many pages on that blog. If you follow the setup, you can get the examples working in no time.