From 98efc65a52e23ab113e82b1c7f39d58c4210e4df Mon Sep 17 00:00:00 2001
From: Alexey Zholtikov <git@zh.com.ru>
Date: Wed, 5 Jun 2024 17:53:34 +0300
Subject: [PATCH] Version 1.0.2

Added multiple attempts to send a message.
---
 include/zh_espnow.h | 4 +++-
 version.txt         | 2 +-
 zh_espnow.c         | 9 +++++++++
 3 files changed, 13 insertions(+), 2 deletions(-)

diff --git a/include/zh_espnow.h b/include/zh_espnow.h
index 4115b5f..1603e72 100644
--- a/include/zh_espnow.h
+++ b/include/zh_espnow.h
@@ -31,7 +31,8 @@
         .stack_size = 2048,             \
         .queue_size = 32,               \
         .wifi_interface = WIFI_IF_STA,  \
-        .wifi_channel = 1               \
+        .wifi_channel = 1,              \
+        .attempts = 3                   \
     }
 
 #ifdef __cplusplus
@@ -53,6 +54,7 @@ extern "C"
         uint8_t queue_size;              ///< Queue size for task for the ESP-NOW messages processing. @note The size depends on the number of messages to be processed. It is not recommended to set the value less than 16.
         wifi_interface_t wifi_interface; ///< WiFi interface (STA or AP) used for ESP-NOW operation. @note The MAC address of the device depends on the selected WiFi interface.
         uint8_t wifi_channel;            ///< Wi-Fi channel uses to send/receive ESP-NOW data. @note Values from 1 to 14.
+        uint8_t attempts;                ///< Maximum number of attempts to send a message. @note It is not recommended to set a value greater than 5.
     } zh_espnow_init_config_t;
 
     /// \cond
diff --git a/version.txt b/version.txt
index 7f20734..e6d5cb8 100644
--- a/version.txt
+++ b/version.txt
@@ -1 +1 @@
-1.0.1
\ No newline at end of file
+1.0.2
\ No newline at end of file
diff --git a/zh_espnow.c b/zh_espnow.c
index 24d7d47..0220c0b 100644
--- a/zh_espnow.c
+++ b/zh_espnow.c
@@ -27,6 +27,7 @@ static QueueHandle_t _queue_handle = {0};
 static TaskHandle_t _processing_task_handle = {0};
 static zh_espnow_init_config_t _init_config = {0};
 static bool _is_initialized = false;
+static uint8_t _attempts = 0;
 
 /// \cond
 typedef struct
@@ -277,6 +278,8 @@ static void _processing(void *pvParameter)
             }
             memset(on_send, 0, sizeof(zh_espnow_event_on_send_t));
             memcpy(on_send->mac_addr, queue.data.mac_addr, 6);
+        SEND:
+            ++_attempts;
             err = esp_now_send(queue.data.mac_addr, queue.data.payload, queue.data.payload_len);
             if (err == ESP_ERR_ESPNOW_NO_MEM)
             {
@@ -305,11 +308,17 @@ static void _processing(void *pvParameter)
             {
                 ESP_LOGI(TAG, "Confirmation message received. ESP-NOW message to MAC %02X:%02X:%02X:%02X:%02X:%02X sent success.", MAC2STR(queue.data.mac_addr));
                 on_send->status = ZH_ESPNOW_SEND_SUCCESS;
+                _attempts = 0;
             }
             else
             {
+                if (_attempts < _init_config.attempts)
+                {
+                    goto SEND;
+                }
                 ESP_LOGE(TAG, "Confirmation message not received. ESP-NOW message to MAC %02X:%02X:%02X:%02X:%02X:%02X sent fail.", MAC2STR(queue.data.mac_addr));
                 on_send->status = ZH_ESPNOW_SEND_FAIL;
+                _attempts = 0;
             }
             ESP_LOGI(TAG, "Outgoing ESP-NOW data to MAC %02X:%02X:%02X:%02X:%02X:%02X processed success.", MAC2STR(queue.data.mac_addr));
             if (esp_event_post(ZH_ESPNOW, ZH_ESPNOW_ON_SEND_EVENT, on_send, sizeof(zh_espnow_event_on_send_t), portTICK_PERIOD_MS) != ESP_OK)