Parse PAYLOAD from Zigbee comman

[KrystofVydra]

Hello,

I am working with Window Covering cluster. 

I receive command ZB_ZCL_WINDOW_COVERING_GO_TO_TILT_PERCENTAGE_CB_ID from my coordinator successfully, but I can't get the value from the payload.

I tried the following, but it is not working:

case ZB_ZCL_WINDOW_COVERING_GO_TO_TILT_PERCENTAGE_CB_ID:

          NRF_LOG_INFO("GO TO TILT PERCENTAGE, value: %hd", p_device_cb_param->cb_param.set_attr_value_param.values.data8);
          NRF_LOG_FLUSH();
          //function go to tilt
          break;

I tried to copy it from the light_bulb example, but it seems that thing are different for Window Covering application somehow.

I am completely stuck here. I must be missing something crucial.

Here is my whole zcl_device_cb callback:

zb_void_t zcl_device_cb(zb_bufid_t bufid)
{
    zb_uint8_t                       cluster_id;
    zb_uint8_t                       attr_id;
    zb_zcl_device_callback_param_t * p_device_cb_param = ZB_BUF_GET_PARAM(bufid, zb_zcl_device_callback_param_t);
    zb_uint8_t                       battery_percentage;
    zb_zcl_status_t                  zcl_status;

    NRF_LOG_INFO("zcl_device_cb id %hd", p_device_cb_param->device_cb_id);
    
    p_device_cb_param->status = RET_OK;

    
    switch (p_device_cb_param->device_cb_id)
    {
      
      
      case ZB_ZCL_WINDOW_COVERING_UP_OPEN_CB_ID:
          NRF_LOG_INFO("OPEN UP");
          NRF_LOG_FLUSH();
          //function open
          if (LimitIsSet)
          {
            Stepper_Spin(OPEN, StepsRange - CurrentStep);
          }

          NRF_LOG_INFO("CurrentStep: %d   StepsRange: %d", CurrentStep, StepsRange);
          NRF_LOG_FLUSH();

          break;

      case ZB_ZCL_WINDOW_COVERING_DOWN_CLOSE_CB_ID:
          NRF_LOG_INFO("CLOSE DOWN");
          NRF_LOG_FLUSH();
          //m_dev_ctx.power_config_attr.remaining = m_dev_ctx.power_config_attr.remaining + 1;
          //UNUSED_RETURN_VALUE(zb_zcl_set_attr_val(HA_WINDOW_COVERING_ENDPOINT, ZB_ZCL_CLUSTER_ID_POWER_CONFIG, ZB_ZCL_CLUSTER_SERVER_ROLE, ZB_ZCL_ATTR_POWER_CONFIG_BATTERY_PERCENTAGE_REMAINING_ID, &m_dev_ctx.power_config_attr.remaining, ZB_FALSE));
          //fuction close
          Stepper_Spin(CLOSE, MaxStep);
          CurrentStep = 0;
          NRF_LOG_INFO("CurrentStep: %d   StepsRange: %d", CurrentStep, StepsRange);
          NRF_LOG_FLUSH();


          break;
      
      case ZB_ZCL_WINDOW_COVERING_GO_TO_TILT_PERCENTAGE_CB_ID:

          NRF_LOG_INFO("GO TO TILT PERCENTAGE, value: %hd", p_device_cb_param->cb_param.set_attr_value_param.values.data8);
          NRF_LOG_FLUSH();
          //function go to tilt
          break;

      default:
            p_device_cb_param->status = RET_ERROR;
            break;
    
    
    }


    battery_percentage = Voltage_Read();
    zcl_status = zb_zcl_set_attr_val(HA_WINDOW_COVERING_ENDPOINT,
                                     ZB_ZCL_CLUSTER_ID_POWER_CONFIG, 
                                     ZB_ZCL_CLUSTER_SERVER_ROLE, 
                                     ZB_ZCL_ATTR_POWER_CONFIG_BATTERY_PERCENTAGE_REMAINING_ID,
                                     (zb_uint8_t *)&battery_percentage, 
                                     ZB_FALSE);

    if(zcl_status != ZB_ZCL_STATUS_SUCCESS)
    {
        NRF_LOG_INFO("Set battery remaining percentage value fail. zcl_status: %d,", zcl_status);
    }
    



}

I also found some similar posts, but I couldn't get it to work. One of them seems outdated (1) and the second one seems to be using endpoint handler (2) which I am not sure if is needed.

1 https://devzone.nordicsemi.com/f/nordic-q-a/53351/parsing-values-from-coordinator-to-router

2 https://devzone.nordicsemi.com/f/nordic-q-a/70222/reading-command-payload-in-zigbee-callback/292460#292460

I am still fairly new to Zigbee development, but I have already got the Window Covering cluster with Battery reporting running. But now I am stuck here.

Thanks in advance!

Best regards,

Krystof Vydra

[Simonr]

Hi Krystof

I would suggest you start by trying to find out what exactly is not working in the WINDOW_COVERING function(s) you're using, and what is failing. Do you have any debug information at all that might help us see what error code(s) you're running into?

You can check out what parameters should be used by ZB_ZCL_WINDOW_COVERING_GO_TO_TILT_PERCENTAGE_CB_ID in the SDK documentation here, as they are indeed different from the light bulb cluster if I'm not mistaken. When debugging you should also be able to see what parameters are failing as well, so that would be the place to start out.

Best regards,

Simon

[KrystofVydra]

Hello Simon

I have got it working today, I had to implement the custom zcl_ep_handler like this:

    zb_zcl_parsed_hdr_t *p_cmd_info = ZB_BUF_GET_PARAM(bufid, zb_zcl_parsed_hdr_t);

    if (p_cmd_info -> cmd_id == ZB_ZCL_CMD_WINDOW_COVERING_GO_TO_TILT_PERCENTAGE)
    {
      zb_uint8_t cmd_len = zb_buf_len(bufid);
      zb_uint8_t *pin_payload = (zb_uint8_t*) zb_buf_begin(bufid);
      uint8_t new_tilt_percentage = pin_payload[0];

Thank you very much for help!

Best regards,

Krystof Vydra