Add ESP8266 example

examples/esp32/main/main.c

@@ -3,8 +3,8 @@
 
 #include "mongoose.h"
 
-#define WIFI_SSID "VMDF554B9"     // SET THIS!
-#define WIFI_PASS "Mp7wjmamPafa"  // SET THIS!
+#define WIFI_SSID "WIFI_NETWORK"   // SET THIS!
+#define WIFI_PASS "WIFI_PASSWORD"  // SET THIS!
 
 #define SERVER_URL "http://0.0.0.0:80"
 #define CLIENT_URL "http://info.cern.ch"
@@ -12,7 +12,7 @@
 // Event handler for an server (accepted) connection
 static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
   if (ev == MG_EV_HTTP_MSG) {
-    mg_http_reply(c, 200, "", "Hello from ESP32!\n");
+    mg_http_reply(c, 200, "", "Hello from ESP!\n");
   }
 }
 

examples/esp32/main/wifi.c

@@ -1,13 +1,13 @@
 // Code taken from the ESP32 IDF WiFi station Example
 
 #include <string.h>
-#include "freertos/FreeRTOS.h"
-#include "freertos/task.h"
-#include "freertos/event_groups.h"
-#include "esp_system.h"
-#include "esp_wifi.h"
 #include "esp_event.h"
 #include "esp_log.h"
+#include "esp_system.h"
+#include "esp_wifi.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/event_groups.h"
+#include "freertos/task.h"
 #include "nvs_flash.h"
 
 #include "lwip/err.h"
@@ -17,11 +17,12 @@
 
 static EventGroupHandle_t s_wifi_event_group;
 
-/* The event group allows multiple bits for each event, but we only care about two events:
+/* The event group allows multiple bits for each event, but we only care about
+ * two events:
  * - we are connected to the AP with an IP
  * - we failed to connect after the maximum amount of retries */
 #define WIFI_CONNECTED_BIT BIT0
-#define WIFI_FAIL_BIT      BIT1
+#define WIFI_FAIL_BIT BIT1
 
 static int s_retry_num = 0;
 
@@ -47,7 +48,7 @@ static void event_handler(void *arg, esp_event_base_t event_base,
   }
 }
 
-void wifi_init(const char *ssid, const char *pass, void (*fn)(void)) {
+void wifi_init(const char *ssid, const char *pass) {
   esp_err_t ret = nvs_flash_init();
   if (ret == ESP_ERR_NVS_NO_FREE_PAGES ||
       ret == ESP_ERR_NVS_NEW_VERSION_FOUND) {

examples/esp8266/Makefile

@@ -0,0 +1,10 @@
+THISDIR = $(realpath $(CURDIR))
+ROOTDIR = $(realpath $(CURDIR)/../..)
+
+all: example
+
+example: src/main/main.c src/main/wifi.c Makefile
+	docker run --rm -v $(ROOTDIR):$(ROOTDIR) -w $(THISDIR) docker.io/mdashnet/8266 make -C src defconfig app
+
+clean:
+	rm -rf $(PROG) *.o *.dSYM *.gcov *.gcno *.gcda *.obj *.exe *.ilk *.pdb mongoose mongoose_* mongoose.* src/build src/sdkconfig

examples/esp8266/src/Makefile

@@ -0,0 +1,9 @@
+#
+# This is a project Makefile. It is assumed the directory this Makefile resides in is a
+# project subdirectory.
+#
+
+PROJECT_NAME := mongoose-example
+
+include $(IDF_PATH)/make/project.mk
+

examples/esp8266/src/main/component.mk

@@ -0,0 +1,10 @@
+  #
+  # Main component makefile.
+  #
+  # This Makefile can be left empty. By default, it will take the sources in the 
+  # src/ directory, compile them and link them into lib(subdirectory_name).a 
+  # in the build directory. This behaviour is entirely configurable,
+  # please read the ESP-IDF documents if you need to do this.
+#
+
+COMPONENT_INCLUDES += ../../../../..

examples/esp8266/src/main/main.c

@@ -0,0 +1,54 @@
+// Copyright (c) 2020 Cesanta Software Limited
+// All rights reserved
+
+#include "mongoose.h"
+
+#define WIFI_SSID "WIFI_NETWORK"   // SET THIS!
+#define WIFI_PASS "WIFI_PASSWORD"  // SET THIS!
+
+#define SERVER_URL "http://0.0.0.0:80"
+#define CLIENT_URL "http://info.cern.ch"
+
+// Event handler for an server (accepted) connection
+static void cb(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_HTTP_MSG) {
+    mg_http_reply(c, 200, "", "Hello from ESP!\n");
+  }
+}
+
+// Event handler for a client connection - fetch the first web page in history
+// To enable TLS for HTTP,
+//   1. Copy "ca.pem" file to the ESP32 flash FS
+//   2. Add TLS init snippet for the connection, see examples/http-client
+static void cb2(struct mg_connection *c, int ev, void *ev_data, void *fn_data) {
+  if (ev == MG_EV_CONNECT) {
+    struct mg_str s = mg_url_host(CLIENT_URL);
+    mg_printf(c, "GET / HTTP/1.0\r\nHost: %.*s\r\n\r\n", (int) s.len, s.ptr);
+  } else if (ev == MG_EV_HTTP_MSG) {
+    struct mg_http_message *hm = ev_data;  // Print HTTP response
+    LOG(LL_INFO, ("Fetched:\n%.*s", (int) hm->message.len, hm->message.ptr));
+    c->is_closing = 1;
+  }
+}
+
+// Called after we're connected to WiFi network
+static void run_mongoose(void) {
+  struct mg_mgr mgr;
+  mg_log_set("3");
+  mg_mgr_init(&mgr);
+  mg_http_listen(&mgr, SERVER_URL, cb, &mgr);    // Listening server
+  mg_http_connect(&mgr, CLIENT_URL, cb2, &mgr);  // Example client
+  LOG(LL_INFO, ("Starting Mongoose web server v%s", MG_VERSION));
+  for (;;) mg_mgr_poll(&mgr, 1000);
+  mg_mgr_free(&mgr);
+}
+
+void app_main(void) {
+  // Setup wifi. This function is implemented in wifi.c
+  // It blocks until connected to the configured WiFi network
+  void wifi_init(const char *ssid, const char *pass);
+  wifi_init(WIFI_SSID, WIFI_PASS);
+
+  // Done connecting to WiFi, now start HTTP server
+  run_mongoose();
+}

examples/esp8266/src/main/mongoose.c

@@ -0,0 +1 @@
+../../../../mongoose.c

examples/esp8266/src/main/wifi.c

@@ -0,0 +1,86 @@
+#include <string.h>
+#include "esp_event.h"
+#include "esp_log.h"
+#include "esp_system.h"
+#include "esp_wifi.h"
+#include "freertos/FreeRTOS.h"
+#include "freertos/event_groups.h"
+#include "freertos/task.h"
+#include "nvs_flash.h"
+
+#include "lwip/err.h"
+#include "lwip/sys.h"
+
+#include "mongoose.h"
+
+static EventGroupHandle_t s_wifi_event_group;
+
+/* The event group allows multiple bits for each event, but we only care about
+ * two events:
+ * - we are connected to the AP with an IP
+ * - we failed to connect after the maximum amount of retries */
+#define WIFI_CONNECTED_BIT BIT0
+#define WIFI_FAIL_BIT BIT1
+
+static int s_retry_num = 0;
+
+static void event_handler(void *arg, esp_event_base_t event_base,
+                          int32_t event_id, void *event_data) {
+  if (event_base == WIFI_EVENT && event_id == WIFI_EVENT_STA_START) {
+    esp_wifi_connect();
+  } else if (event_base == WIFI_EVENT &&
+             event_id == WIFI_EVENT_STA_DISCONNECTED) {
+    if (s_retry_num < 3) {
+      esp_wifi_connect();
+      s_retry_num++;
+      LOG(LL_DEBUG, ("retry to connect to the AP"));
+    } else {
+      xEventGroupSetBits(s_wifi_event_group, WIFI_FAIL_BIT);
+    }
+    LOG(LL_ERROR, ("connect to the AP fail"));
+  } else if (event_base == IP_EVENT && event_id == IP_EVENT_STA_GOT_IP) {
+    ip_event_got_ip_t *event = (ip_event_got_ip_t *) event_data;
+    LOG(LL_INFO, ("got ip:%s", ip4addr_ntoa(&event->ip_info.ip)));
+    s_retry_num = 0;
+    xEventGroupSetBits(s_wifi_event_group, WIFI_CONNECTED_BIT);
+  }
+}
+
+void wifi_init(const char *ssid, const char *pass) {
+  s_wifi_event_group = xEventGroupCreate();
+  tcpip_adapter_init();
+  ESP_ERROR_CHECK(esp_event_loop_create_default());
+  wifi_init_config_t cfg = WIFI_INIT_CONFIG_DEFAULT();
+  ESP_ERROR_CHECK(esp_wifi_init(&cfg));
+  ESP_ERROR_CHECK(esp_event_handler_register(WIFI_EVENT, ESP_EVENT_ANY_ID,
+                                             &event_handler, NULL));
+  ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_STA_GOT_IP,
+                                             &event_handler, NULL));
+
+  wifi_config_t c = {};
+  snprintf((char *) c.sta.ssid, sizeof(c.sta.ssid), "%s", ssid);
+  snprintf((char *) c.sta.password, sizeof(c.sta.password), "%s", pass);
+  if (pass != NULL && pass[0] != '\0') {
+    c.sta.threshold.authmode = WIFI_AUTH_WPA2_PSK;
+  }
+  ESP_ERROR_CHECK(esp_wifi_set_mode(WIFI_MODE_STA));
+  ESP_ERROR_CHECK(esp_wifi_set_config(ESP_IF_WIFI_STA, &c));
+  ESP_ERROR_CHECK(esp_wifi_start());
+  EventBits_t bits = xEventGroupWaitBits(s_wifi_event_group,
+                                         WIFI_CONNECTED_BIT | WIFI_FAIL_BIT,
+                                         pdFALSE, pdFALSE, portMAX_DELAY);
+
+  if (bits & WIFI_CONNECTED_BIT) {
+    LOG(LL_INFO, ("connected to ap SSID:%s password:%s", ssid, pass));
+  } else if (bits & WIFI_FAIL_BIT) {
+    LOG(LL_ERROR, ("Failed to connect to SSID:%s, password:%s", ssid, pass));
+  } else {
+    LOG(LL_ERROR, ("UNEXPECTED EVENT"));
+  }
+
+  ESP_ERROR_CHECK(esp_event_handler_unregister(IP_EVENT, IP_EVENT_STA_GOT_IP,
+                                               &event_handler));
+  ESP_ERROR_CHECK(esp_event_handler_unregister(WIFI_EVENT, ESP_EVENT_ANY_ID,
+                                               &event_handler));
+  vEventGroupDelete(s_wifi_event_group);
+}

mongoose.c

@@ -3810,7 +3810,8 @@ unsigned long mg_millis(void) {
 #elif MG_ARCH == MG_ARCH_ESP32
   return esp_timer_get_time() / 1000;
 #elif MG_ARCH == MG_ARCH_ESP8266
-  return system_get_time() / 1000;
+  // return system_get_time() / 1000;
+  return xTaskGetTickCount() * portTICK_PERIOD_MS;
 #elif MG_ARCH == MG_ARCH_FREERTOS
   return xTaskGetTickCount() * portTICK_PERIOD_MS;
 #else

mongoose.h

@@ -61,10 +61,10 @@
 #define MG_ARCH MG_ARCH_NXP_KINETIS
 #elif defined(PIC32)
 #define MG_ARCH MG_ARCH_PIC32
-#elif defined(ESP_PLATFORM)
-#define MG_ARCH MG_ARCH_ESP32
 #elif defined(ICACHE_FLASH) || defined(ICACHE_RAM_ATTR)
 #define MG_ARCH MG_ARCH_ESP8266
+#elif defined(ESP_PLATFORM)
+#define MG_ARCH MG_ARCH_ESP32
 #elif defined(TARGET_IS_TM4C129_RA0) || defined(TARGET_IS_TM4C129_RA1) || \
     defined(TARGET_IS_TM4C129_RA2)
 #define MG_ARCH MG_ARCH_TM4C129
@@ -128,26 +128,11 @@
 #if MG_ARCH == MG_ARCH_ESP8266
 
 #include <dirent.h>
+#include <esp_system.h>
+#include <netdb.h>
 #include <stdbool.h>
 #include <sys/time.h>
-#include <user_interface.h>
-
 #define MG_DIRSEP '/'
-#ifndef PATH_MAX
-#define PATH_MAX 128
-#endif
-#define MG_ENABLE_LWIP 1
-#define LWIP_TIMEVAL_PRIVATE 0  // struct timeval is defined in sys/time.h
-
-#if LWIP_SOCKET
-#include <lwip/sockets.h>
-#else
-#undef LWIP_SOCKET
-#define LWIP_SOCKET 1
-#include <lwip/sockets.h>  // Source sockaddr_in anyway
-#undef LWIP_SOCKET
-#define LWIP_SOCKET 0
-#endif
 
 #endif
 

src/arch.h

@@ -42,10 +42,10 @@
 #define MG_ARCH MG_ARCH_NXP_KINETIS
 #elif defined(PIC32)
 #define MG_ARCH MG_ARCH_PIC32
-#elif defined(ESP_PLATFORM)
-#define MG_ARCH MG_ARCH_ESP32
 #elif defined(ICACHE_FLASH) || defined(ICACHE_RAM_ATTR)
 #define MG_ARCH MG_ARCH_ESP8266
+#elif defined(ESP_PLATFORM)
+#define MG_ARCH MG_ARCH_ESP32
 #elif defined(TARGET_IS_TM4C129_RA0) || defined(TARGET_IS_TM4C129_RA1) || \
     defined(TARGET_IS_TM4C129_RA2)
 #define MG_ARCH MG_ARCH_TM4C129

src/arch_esp8266.h

@@ -3,25 +3,10 @@
 #if MG_ARCH == MG_ARCH_ESP8266
 
 #include <dirent.h>
+#include <esp_system.h>
+#include <netdb.h>
 #include <stdbool.h>
 #include <sys/time.h>
-#include <user_interface.h>
-
 #define MG_DIRSEP '/'
-#ifndef PATH_MAX
-#define PATH_MAX 128
-#endif
-#define MG_ENABLE_LWIP 1
-#define LWIP_TIMEVAL_PRIVATE 0  // struct timeval is defined in sys/time.h
-
-#if LWIP_SOCKET
-#include <lwip/sockets.h>
-#else
-#undef LWIP_SOCKET
-#define LWIP_SOCKET 1
-#include <lwip/sockets.h>  // Source sockaddr_in anyway
-#undef LWIP_SOCKET
-#define LWIP_SOCKET 0
-#endif
 
 #endif

src/util.c

@@ -269,7 +269,8 @@ unsigned long mg_millis(void) {
 #elif MG_ARCH == MG_ARCH_ESP32
   return esp_timer_get_time() / 1000;
 #elif MG_ARCH == MG_ARCH_ESP8266
-  return system_get_time() / 1000;
+  // return system_get_time() / 1000;
+  return xTaskGetTickCount() * portTICK_PERIOD_MS;
 #elif MG_ARCH == MG_ARCH_FREERTOS
   return xTaskGetTickCount() * portTICK_PERIOD_MS;
 #else