Zigbee attribute reporting only on value change

Question

Hello, I am using the Zigbee CLI Agent as coordinator, and when a router device or end device joins the network I want to configure attribute reporting. 
 I am able to configure attribute reporting, and the CLI log (zigbee.report module) prints the reports. But, I don't understand how to configure reporting only on value change. I tried to call the CLI command: subscribe on (after binding the cluster to the coordinator) with max_interval=0 and min_interval=0 but nothing changes. I want the device to report only on value changes. How can I configure this with the CLI? 
 Best regards, Damien

Edvin · Accepted Answer

Just to clarify, I tested this against the multi_sensor example, and these are the changes I did to the CLI example:

The only changes are in zigbee_cli_cmd_attr_report.c. Right below the line:

#define ZIGBEE_CLI_CONFIGURE_REPORT_DEFAULT_VALUE_CHANGE NULL

I add:

zb_uint8_t minimum_report_change_value = 1;

Then, inside cmd_zb_subscribe(), I change:

    ZB_ZCL_GENERAL_ADD_SEND_REPORT_CONFIGURE_REPORTING_REQ(p_cmd_ptr,
        req.attr_id, req.attr_type, req.interval_min, req.interval_max,
        ZIGBEE_CLI_CONFIGURE_REPORT_DEFAULT_VALUE_CHANGE);

to

    ZB_ZCL_GENERAL_ADD_SEND_REPORT_CONFIGURE_REPORTING_REQ(p_cmd_ptr,
        req.attr_id, req.attr_type, req.interval_min, req.interval_max,
        &minimum_report_change_value);

Those were the only changes I did to the CLI example. I tested this using the multi sensor example, running on another DK. I used the unmodified example, and changed a few things:

Inside zb_app_timer_handler(), I removed the part that updated the new_temp_value and new_pres_value. I just set them to the same value on every timeout callback:

static void zb_app_timer_handler(void * context)
{
    zb_zcl_status_t zcl_status;
    static zb_int16_t new_temp_value = 1200;
    static zb_int16_t new_pres_value = 745;

    zcl_status = zb_zcl_set_attr_val(MULTI_SENSOR_ENDPOINT, 
                                     ZB_ZCL_CLUSTER_ID_TEMP_MEASUREMENT, 
                                     ZB_ZCL_CLUSTER_SERVER_ROLE, 
                                     ZB_ZCL_ATTR_TEMP_MEASUREMENT_VALUE_ID, 
                                     (zb_uint8_t *)&new_temp_value2, 
                                     ZB_FALSE);
    if(zcl_status != ZB_ZCL_STATUS_SUCCESS)
    {
        NRF_LOG_INFO("Set temperature value fail. zcl_status: %d", zcl_status);
    }

    zcl_status = zb_zcl_set_attr_val(MULTI_SENSOR_ENDPOINT,
                                     ZB_ZCL_CLUSTER_ID_PRESSURE_MEASUREMENT, 
                                     ZB_ZCL_CLUSTER_SERVER_ROLE, 
                                     ZB_ZCL_ATTR_PRES_MEASUREMENT_VALUE_ID, 
                                     (zb_uint8_t *)&new_pres_value2, 
                                     ZB_FALSE);
    if(zcl_status != ZB_ZCL_STATUS_SUCCESS)
    {
        NRF_LOG_INFO("Set pressure value fail. zcl_status: %d", zcl_status);
    }
}

Then I added a button handler by modifying the leds_init() function:

error_code = bsp_init(BSP_INIT_LEDS | BSP_INIT_BUTTONS, my_button_event_handler);

And finally adding the my_button_event_handler callback:

void my_button_event_handler(bsp_event_t bsp_evt)
{
    zb_zcl_status_t zcl_status;
    uint8_t button_pressed = bsp_evt - BSP_EVENT_KEY_0;
    NRF_LOG_INFO("button %d pressed", button_pressed);
    
    static zb_int16_t new_temp_value = 1300;
    static zb_int16_t new_pres_value = 800;
    
    if (button_pressed == 0)
    {
        new_temp_value = 1200;
        new_pres_value = 745;
    }
    else if (button_pressed == 1)
    {
        new_temp_value = 1205;
        new_pres_value = 750;
    }
    else if (button_pressed == 2)
    {
        new_temp_value = 1210;
        new_pres_value = 755;
    }
    else if (button_pressed == 3)
    {
        new_temp_value = 1250;
        new_pres_value = 745;
    }
    
    zcl_status = zb_zcl_set_attr_val(MULTI_SENSOR_ENDPOINT,
                                     ZB_ZCL_CLUSTER_ID_TEMP_MEASUREMENT, 
                                     ZB_ZCL_CLUSTER_SERVER_ROLE, 
                                     ZB_ZCL_ATTR_TEMP_MEASUREMENT_VALUE_ID, 
                                     (zb_uint8_t *)&new_temp_value, 
                                     ZB_FALSE);
    if (zcl_status != ZB_ZCL_STATUS_SUCCESS)
    {
        NRF_LOG_INFO("Set temperature value fail. zcl_status: %d", zcl_status);
    }
    
    zcl_status = zb_zcl_set_attr_val(MULTI_SENSOR_ENDPOINT,
                                     ZB_ZCL_CLUSTER_ID_PRESSURE_MEASUREMENT, 
                                     ZB_ZCL_CLUSTER_SERVER_ROLE, 
                                     ZB_ZCL_ATTR_PRES_MEASUREMENT_VALUE_ID, 
                                     (zb_uint8_t *)&new_pres_value, 
                                     ZB_FALSE);
    if(zcl_status != ZB_ZCL_STATUS_SUCCESS)
    {
        NRF_LOG_INFO("Set pressure value fail. zcl_status: %d", zcl_status);
    }
}

Then, I used the normal CLI commands to see the reports:

bdb role zc
bdb channel <channel that I use on the multi_sensor example>
bdb start

zdo match_desc 0xffff 0xffff 0x0104 2 0x0402 0x0403 0
<returns addr:1234, ep:10>
zdo ieee_addr 0x1234
<returns "multi_sensor_long_addr">
zdo eui64
<returns "cli_long_addr">

zdo bind on <multi_sensor_long_addr> 10 <cli_long_addr> 64 0x0402 0x1234
zdo bind on <multi_sensor_long_addr> 10 <cli_long_addr> 64 0x0403 0x1234

zcl subscribe on <multi_sensor_long_addr> 10 0x0402 0x0104 0 41 0 0
zcl subscribe on <multi_sensor_long_addr> 10 0x0403 0x0104 0 41 0 0

log enable info zigbee_report

I don't see any reports but when I press the buttons on the multi sensor DK, it reports the changes corresponding to the button presses.

Can you test this, to see that you modified the CLI example correctly, and then try on the device that doesn't work with change based reports?

If that still doesn't work, I am afraid there is not much I can do. Then you need to modify your CLI device that outputs the logs. You need to store the last received values on each attribute, and only print if the values are changed since the last time.

Best regards,

Edvin

Zigbee attribute reporting only on value change

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