How to show battery level in iOS and Android using BLE?

[ramier]

Hey,
I want to show my battery level in iOS and Android, like headphones tpiycaly do.

My code looks something like this, with nRF I do get the correct results, but nowhere in Android or iOS can I see my battery status.
Has anybody managed to show the battery level in iOS or Android?

Code: [Select all] [Expand/Collapse]

1. uint8_t battery_level = 42;
2. int gatt_svr_chr_access_battery_level(uint16_t conn_handler, uint16_t attr_handler, struct ble_gatt_access_ctxt *ctxt, void *arg) {
3.     os_mbuf_append(ctxt->om, &battery_level, sizeof(battery_level));
4.     return 0;
5. }

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Code: [Select all] [Expand/Collapse]

1. {
2.         .type = BLE_GATT_SVC_TYPE_PRIMARY,
3.         .uuid = BLE_UUID16_DECLARE(0x180F),
4.         .characteristics = (struct ble_gatt_chr_def[]) {
5.                 {
6.                         .uuid       = BLE_UUID16_DECLARE(0x2A19),
7.                         .access_cb  = gatt_svr_chr_access_battery_level,
8.                         .flags      = BLE_GATT_CHR_F_READ
9.                 },
10.                 {
11.                         0 /* No more characteristics in this service */
12.                 }
13.         }
14. },

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