feat(subghz): add Honeywell 5834-4 keyfob protocol (#4339)

Add Sub-GHz protocol for the Honeywell 5834-4 wireless security keyfob
(345 MHz, AM/OOK, 48-bit PWM-encoded frames).

Implements encoder, decoder, and Add Manually menu entry with button
mapping (Arm Away/Stay, Disarm, Panic), 20-bit serial extraction,
battery status, and parity validation.

Author: herbenderbler

applications/debug/unit_tests/resources/unit_tests/Manifest_test

@@ -40,6 +40,10 @@ F:54ceacb8c156f9534fc7ee0a0911f4da:11380:subghz/holtek_ht12x_raw.sub
 F:4a9567c1543cf3e7bb5350b635d9076f:31238:subghz/holtek_raw.sub
 F:ca86c0d78364d704ff62b0698093d396:162:subghz/honeywell_wdb.sub
 F:f606548c935adc8d8bc804326ef67543:38415:subghz/honeywell_wdb_raw.sub
+F:14edaac76a69457b795c5c391cf581b1:12281:subghz/honeywell_5834_arm_away.sub
+F:a958447531d0ea1a1f6ee3ccb3501842:10041:subghz/honeywell_5834_disarm.sub
+F:d8f736cc1c020e9c062bb8ced371dcba:10239:subghz/honeywell_5834_panic.sub
+F:f406deee6ecb957cb40a8edcad58f842:13442:subghz/honeywell_5834_stay.sub
 F:20bba4b0aec006ced7e82513f9459e31:15532:subghz/hormann_hsm_raw.sub
 F:3392f2db6aa7777e937db619b86203bb:10637:subghz/ido_117_111_raw.sub
 F:cc5c7968527cc233ef11a08986e31bf2:167:subghz/intertechno_v3.sub

applications/main/subghz/helpers/subghz_custom_event.h

@@ -22,6 +22,7 @@ typedef enum {
     SubmenuIndexSecPlus_v2_310_00,
     SubmenuIndexSecPlus_v2_315_00,
     SubmenuIndexSecPlus_v2_390_00,
+    SubmenuIndexHoneywell5834_345,
 
     //SubGhzCustomEvent
     SubGhzCustomEventSceneDeleteSuccess = 100,

applications/main/subghz/scenes/subghz_scene_set_type.c

@@ -109,6 +109,12 @@ void subghz_scene_set_type_on_enter(void* context) {
         SubmenuIndexSecPlus_v2_390_00,
         subghz_scene_set_type_submenu_callback,
         subghz);
+    submenu_add_item(
+        subghz->submenu,
+        "Honeywell5834_345",
+        SubmenuIndexHoneywell5834_345,
+        subghz_scene_set_type_submenu_callback,
+        subghz);
 
     submenu_set_selected_item(
         subghz->submenu, scene_manager_get_scene_state(subghz->scene_manager, SubGhzSceneSetType));
@@ -212,6 +218,16 @@ bool subghz_scene_set_type_on_event(void* context, SceneManagerEvent event) {
             generated_protocol = subghz_txrx_gen_secplus_v2_protocol(
                 subghz->txrx, "AM650", 390000000, key, 0x68, 0xE500000);
             break;
+        case SubmenuIndexHoneywell5834_345: {
+            /* 20-bit random serial in bits [47:28], default Arm Away state */
+            uint64_t serial_20 = (uint64_t)(key & 0xFFFFF) << 28;
+            uint64_t state_bits = (uint64_t)0x40 << 4; /* Arm Away in state byte */
+            uint64_t frame = serial_20 | state_bits;
+            /* Set parity: bit 0 = popcount parity of bits [47:1] */
+            frame |= subghz_protocol_blocks_get_parity(frame >> 1, 47);
+            generated_protocol = subghz_txrx_gen_data_protocol(
+                subghz->txrx, "AM650", 345000000, SUBGHZ_PROTOCOL_HONEYWELL_5834_NAME, frame, 48);
+        } break;
         default:
             return false;
             break;