Turning off the mesh

[matheusrfdesign]

In my project I need the mesh to be completely disabled in order to save energy. I managed decrease the current consumption down to 200uA when the mesh is inoperative by using the following function:

void timeslot_handler_deinit(void)
{
    if (g_framework_initialized)
    {
        uint32_t error;
        g_is_in_callback = true;
        g_framework_initialized = false;
        error = sd_radio_session_close();
        APP_ERROR_CHECK(error);
        radio_disable();
    }
}

However, the consumption jumps back to 500uA a few milliseconds after the mesh has been deactivated. I assume that there might be some timer event turning the radio back on. So I have been wondering if there is a better way to deactivate all the resources used by the mesh in order to improve the energy consumption.

[trond-snekvik]

Hi, have you tried the rbc_mesh_stop() function call? It should accomplish what you want, without having the mesh trying to bring itself back from the dead. When you order radio_session_close(), you'll get an event to the timeslot_handler saying SESSION_CLOSED, and the mesh propagates an error to the application. When you do it without closing the current timeslot, you may experience that the mesh attempts to turn itself back on.

[matheusrfdesign]

Hi, thanks for the answer! Although, I forgot to say that I am still using the older version of the mesh, so the rbc_mesh_stop() call is not available.

[trond-snekvik]

Ah, I see. I would recommend copying the approach from the implementation of rbc_mesh_stop(). It's all contained in this commit, in the timeslot_handler.c-file. Notice how it doesn't stop the session, but just cancels the current timeslot without ordering a new one