Mesh sensor cadence

[toni95]

Hi everyone,

I am planning to use the cadence/publish interval property within a mesh network. I can not find any examples on how to use it. I know I can set it in the nrf mesh app but I would like to set the cadence in my implementation (like by clicking a button on the nrf52840DK). The sensor observer should be able to call the set function to set the cadence on a sensor server. Also the sensor observer should get some information about the cadence from the sensor server. Can anyone share some code on how to do it?

Best,

Toni

[toni95]

Okay I might already have the answer as the sensor observer can not set the cadence on the sensor server, can it?

[Hieu]

Hi Toni,

The Sensor Observer sample uses the Sensor Client model, which, by spec, has to support Sensor Cadence Set. See Section 4.4.1.1 of the Bluetooth Mesh Models Specification v1.0.1. I also captured the relevant table below.

As for code reference, have you looked at these functions?

bt_mesh_sensor_cli_cadence_set()
bt_mesh_sensor_cli_cadence_set_unack()

Best,

Hieu

[toni95]

Hi Hieu,

thank you the quick reply! I read it already and tried to implement it, but without success.
I implemented the bt_mesh_sensor_present_ambient_light_level type and would like to get/set the candence settings on the server.
First I want to get the cadence on the client by pressing a button on the DK. Therefore I use the function

err = bt_mesh_sensor_cli_cadence_get(&sensor_cli, NULL, &bt_mesh_sensor_present_amb_light_level, &rsp);

And on the sensor server I configured it like this:

static struct bt_mesh_sensor present_amb_light_level = {
	.type = &bt_mesh_sensor_present_amb_light_level,
	.get = amb_light_level_get,
	.descriptor = &amb_light_level_desc,
	.settings = {
		.list = (const struct bt_mesh_sensor_setting *)&amb_light_level_setting,
		.count = ARRAY_SIZE(amb_light_level_setting),
	},
	.state = {
		.configured = true,
		.fast_pub = true,
		.pub_div = 1,
		.min_int = 10,
		.threshold = {
			.range = {
				.cadence = BT_MESH_SENSOR_CADENCE_NORMAL,
				.low = {
					.format = &bt_mesh_sensor_format_count_16,
					.raw = {0x00, 0x00} // Replace with the actual raw value for low
				},
				.high = {
					.format = &bt_mesh_sensor_format_count_16,
					.raw = {0x0A, 0x00} // Replace with the actual raw value for high
				},
			},
			.deltas = {
				.up = {
					.format = &bt_mesh_sensor_format_count_16,
					.raw = {0x02, 0x00} // Replace with the actual raw value for up
				},
				.down = {
					.format = &bt_mesh_sensor_format_count_16,
					.raw = {0x00, 0x00} // Replace with the actual raw value for down
				},
			},
		},
	},
};

I always get the error -ETIMEDOUT

Could you provide some example code?

Best,

Toni

[Hieu]

Hi Toni,

I am currently out of office, so this will have to wait until I return next week. My apology about this.

Best,

Hieu