From a72dc3e4d90a1a3fb35588846ccb656569bb3cb9 Mon Sep 17 00:00:00 2001
From: Rastislav Vysoky <recrof@gmail.com>
Date: Tue, 7 Apr 2026 20:58:55 +0200
Subject: [PATCH] fixes for esp32 and sx1276

---
 zephcore/adapters/wifi/ZephyrWiFiStation.c    | 13 ++++++++
 .../0004-lora-sx127x-62k5-bandwidth.patch     | 32 +++++++++++++++++++
 2 files changed, 45 insertions(+)
 create mode 100644 zephcore/patches/zephyr/0004-lora-sx127x-62k5-bandwidth.patch

diff --git a/zephcore/adapters/wifi/ZephyrWiFiStation.c b/zephcore/adapters/wifi/ZephyrWiFiStation.c
index f0317e5..d631207 100644
--- a/zephcore/adapters/wifi/ZephyrWiFiStation.c
+++ b/zephcore/adapters/wifi/ZephyrWiFiStation.c
@@ -98,6 +98,19 @@ static void wifi_event_handler(struct net_mgmt_event_callback *cb,
 		if (success) {
 			LOG_INF("WiFi link up (SSID: %s)", s_creds ? s_creds->wifi_ssid : "?");
 			s_wifi_link_up = true;
+			/* Disable power save — WIFI_PS_MIN_MODEM (default) sleeps between
+			 * DTIM beacons, which delays ACKs and causes the MQTT broker's TCP
+			 * stack to retransmit and eventually RST the connection (-ECONNRESET
+			 * in the poll loop). WIFI_PS_DISABLED keeps the radio always awake. */
+			struct wifi_ps_params ps = {
+				.enabled = WIFI_PS_DISABLED,
+				.type    = WIFI_PS_PARAM_STATE,
+			};
+			if (net_mgmt(NET_REQUEST_WIFI_PS, iface, &ps, sizeof(ps)) < 0) {
+				LOG_WRN("Failed to disable WiFi power save");
+			} else {
+				LOG_INF("WiFi power save disabled");
+			}
 			/* DHCP will fire ipv4_event_handler when lease is obtained */
 		} else {
 			LOG_WRN("WiFi connect failed (reason=%d) — retry in 10s", reason);
diff --git a/zephcore/patches/zephyr/0004-lora-sx127x-62k5-bandwidth.patch b/zephcore/patches/zephyr/0004-lora-sx127x-62k5-bandwidth.patch
new file mode 100644
index 0000000..f2d971e
--- /dev/null
+++ b/zephcore/patches/zephyr/0004-lora-sx127x-62k5-bandwidth.patch
@@ -0,0 +1,32 @@
+diff --git a/drivers/lora/loramac-node/sx12xx_common.c b/drivers/lora/loramac-node/sx12xx_common.c
+index 17689720dd2..09982dc2e70 100644
+--- a/drivers/lora/loramac-node/sx12xx_common.c
++++ b/drivers/lora/loramac-node/sx12xx_common.c
+@@ -195,8 +195,15 @@ static void sx12xx_ev_rx_error(void)
+ /**
+  * @brief Convert Zephyr bandwidth enum to loramac-node bandwidth index
+  *
+- * The loramac-node library expects bandwidth as an index (0, 1, 2) into its
+- * internal Bandwidths[] array, not the actual kHz value.
++ * The loramac-node library expects bandwidth as an index into its internal
++ * Bandwidths[] array (not the actual kHz value).  The SX127x hardware
++ * supports sub-125 kHz LoRa bandwidths; index 3 maps to 62.5 kHz (reg BW=6).
++ *
++ * Index mapping (kept in sync with sx1276.c / sx1272.c):
++ *   0 → 125 kHz (reg BW 7)
++ *   1 → 250 kHz (reg BW 8)
++ *   2 → 500 kHz (reg BW 9)
++ *   3 → 62.5 kHz (reg BW 6) — SX127x only
+  *
+  * @param bandwidth Zephyr lora_signal_bandwidth enum value
+  * @param bw_idx Pointer to store the resulting bandwidth index
+@@ -215,6 +222,9 @@ static int sx12xx_get_bandwidth_idx(enum lora_signal_bandwidth bandwidth,
+ 	case BW_500_KHZ:
+ 		*bw_idx = 2;
+ 		break;
++	case BW_62_KHZ:
++		*bw_idx = 3;
++		break;
+ 	default:
+ 		return -EINVAL;
+ 	}