How do I change the battery level ?

[daemondong]

I'm using the example of ..\bluetooth\esp_hid_device to do some tests. I can use Lightblue APP on Android phone to read the battery level. It's 0x64 always. I can't find the code to change it. Could anyone can tell me after I get the voltage of battery how do I change the battery level? Thank you.

[daemondong]

I think this is the basic battery function. Could anyone help me about it ? Thank you.

[ESP_Sprite]

You can use esp_hidd_dev_battery_set for that.

[daemondong]

I updated the hid_demo_task as below. I could find the battery level was changed and set. But when I use Bluelight to read the battery level it still keeps 0x64.

Code: [Select all] [Expand/Collapse]

1. void hid_demo_task(void *pvParameters)
2. {
3.     static bool send_volum_up = false;
4.     static uint8_t tcn=0;
5.     static uint8_t lvlBatt=100;
6.     while (1) {
7.         tcn++;
8.         if (tcn>=5) {
9.             tcn=0;
10.             if (lvlBatt>30) lvlBatt--;
11.             esp_hidd_dev_battery_set(hid_dev,lvlBatt);
12.             ESP_LOGI(TAG, "Batt Level = %d",lvlBatt);
13.         }
14.         if (dev_connected) {
15.             ESP_LOGI(TAG, "Send the volume");
16.             if (send_volum_up) {
17.                 esp_hidd_send_consumer_value(HID_CONSUMER_VOLUME_UP, true);
18.                 vTaskDelay(100 / portTICK_PERIOD_MS);
19.                 esp_hidd_send_consumer_value(HID_CONSUMER_VOLUME_UP, false);
20.             } else {
21.                 esp_hidd_send_consumer_value(HID_CONSUMER_VOLUME_DOWN, true);
22.                 vTaskDelay(100 / portTICK_PERIOD_MS);
23.                 esp_hidd_send_consumer_value(HID_CONSUMER_VOLUME_DOWN, false);
24.             }
25.             send_volum_up = !send_volum_up;
26.         }
27.         vTaskDelay(2000 / portTICK_PERIOD_MS);
28.     }
29. }

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Code: [Select all] [Expand/Collapse]

1. I (61098) HID_DEV_DEMO: Batt Level = 94
2. I (61098) HID_DEV_DEMO: Send the volume
3. W (61098) Test: cmd=233,press=1
4.  
5. W (61198) Test: cmd=233,press=0
6.  
7. I (63198) HID_DEV_DEMO: Send the volume
8. W (63198) Test: cmd=234,press=1
9.  
10. W (63298) Test: cmd=234,press=0
11.  
12. I (65298) HID_DEV_DEMO: Send the volume
13. W (65298) Test: cmd=233,press=1
14.  
15. W (65398) Test: cmd=233,press=0
16.  
17. I (67398) HID_DEV_DEMO: Send the volume
18. W (67398) Test: cmd=234,press=1
19.  
20. W (67498) Test: cmd=234,press=0
21.  
22. I (69498) HID_DEV_DEMO: Send the volume
23. W (69498) Test: cmd=233,press=1
24.  
25. W (69598) Test: cmd=233,press=0
26.  
27. I (71598) HID_DEV_DEMO: Batt Level = 93
28. I (71598) HID_DEV_DEMO: Send the volume
29. W (71598) Test: cmd=234,press=1
30.  
31. W (71698) Test: cmd=234,press=0

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[daemondong]

I got it. The battery level should be set as below.

Code: Select all

    
    if (deviceConnected) {
      pCharacteristicBatt->setValue((uint8_t*)&batterylevel, 1);
      pCharacteristicBatt->notify();

      Serial.printf("*** NOTIFY: %s ***\n", logRunning);
      //the function excepts string
      pCharacteristicRun->setValue((uint8_t *)logRunning,512);
      pCharacteristicRun->notify();
    }