Recommendation on how to simply connect two radios

[Mron]

I'm looking for a recommendation on how to simply connect 2 radios to implement a remote switch for a fan.

I'm interested in using Zephyr to begin learning to use it. I have several nrf51822 modules. They only have 16K of ram. This isn't enough to do anything sophisticated with Zephyr.

I'm thinking os setting up one radio as a beacon, advertising a unique id and have the other listen for it. When it receives it, it will turn on the fan. To turn on the fan, turn on the beacon.

Does this seem like a reasonable approach?

[Kenneth]

Hi,

There is no official nordic support for the nRF51-series in zephyr, but I did try to compile two of the BLE examples using nRF51-DK as target board:

https://github.com/zephyrproject-rtos/zephyr/tree/master/samples/bluetooth/peripheral_hr
https://github.com/zephyrproject-rtos/zephyr/tree/master/samples/bluetooth/central_hr

Both required about 17kB RAM.

You may consider using ESB from nRF5 SDKv12.3 instead of BLE:
https://infocenter.nordicsemi.com/topic/com.nordic.infocenter.sdk5.v12.3.0/examples_esb.html 

Best regards,
Kenneth

[Mron]

I have it working on the little guys. I'm trying to find documentation on BT_LE_ADV_IND and BT_LE_ADV_DIRECT_IND. Do you know where to find some info?