Cleans up project a bit, implements GPIO logic untested.

main/CMakeLists.txt

@@ -1,2 +1,2 @@
-idf_component_register(SRCS "portal300-buzzer.c" "mqtt.c"
+idf_component_register(SRCS "portal300-buzzer.c" "mqtt.c" "io.c" "ethernet.c" "portal300.c"
                     INCLUDE_DIRS ".")

main/ethernet.c

@@ -0,0 +1,124 @@
+#include "ethernet.h"
+
+// https://docs.espressif.com/projects/esp-idf/en/latest/esp32/api-reference/network/esp_netif.html
+// https://github.com/ldijkman/WT32-ETH01-LAN-8720-RJ45-
+
+#define CONFIG_EXAMPLE_USE_INTERNAL_ETHERNET
+#define CONFIG_EXAMPLE_ETH_PHY_LAN87XX
+
+
+#define CONFIG_EXAMPLE_ETH_MDC_GPIO 23
+#define CONFIG_EXAMPLE_ETH_MDIO_GPIO 18
+#define CONFIG_EXAMPLE_ETH_POWER_GPIO 16
+
+#include <stdio.h>
+#include <string.h>
+#include "freertos/FreeRTOS.h"
+#include "freertos/task.h"
+#include "esp_netif.h"
+#include "esp_eth.h"
+#include "esp_event.h"
+#include "esp_log.h"
+#include "driver/gpio.h"
+#include "sdkconfig.h"
+#if CONFIG_ETH_USE_SPI_ETHERNET
+#include "driver/spi_master.h"
+#endif // CONFIG_ETH_USE_SPI_ETHERNET
+#include "esp_eth_mac.h"
+
+
+// #include <ethernet/include/eth_phy/phy_lan8720.h>
+
+static const char *TAG = "eth_example";
+
+/** Event handler for Ethernet events */
+static void eth_event_handler(void *arg, esp_event_base_t event_base,
+                              int32_t event_id, void *event_data)
+{
+    uint8_t mac_addr[6] = {0};
+    /* we can get the ethernet driver handle from event data */
+    esp_eth_handle_t eth_handle = *(esp_eth_handle_t *)event_data;
+
+    switch (event_id) {
+    case ETHERNET_EVENT_CONNECTED:
+        esp_eth_ioctl(eth_handle, ETH_CMD_G_MAC_ADDR, mac_addr);
+        ESP_LOGI(TAG, "Ethernet Link Up");
+        ESP_LOGI(TAG, "Ethernet HW Addr %02x:%02x:%02x:%02x:%02x:%02x",
+                 mac_addr[0], mac_addr[1], mac_addr[2], mac_addr[3], mac_addr[4], mac_addr[5]);
+        break;
+    case ETHERNET_EVENT_DISCONNECTED:
+        ESP_LOGI(TAG, "Ethernet Link Down");
+        break;
+    case ETHERNET_EVENT_START:
+        ESP_LOGI(TAG, "Ethernet Started");
+        break;
+    case ETHERNET_EVENT_STOP:
+        ESP_LOGI(TAG, "Ethernet Stopped");
+        break;
+    default:
+        break;
+    }
+}
+
+/** Event handler for IP_EVENT_ETH_GOT_IP */
+static void got_ip_event_handler(void *arg, esp_event_base_t event_base,
+                                 int32_t event_id, void *event_data)
+{
+    ip_event_got_ip_t *event = (ip_event_got_ip_t *) event_data;
+    const esp_netif_ip_info_t *ip_info = &event->ip_info;
+
+    ESP_LOGI(TAG, "Ethernet Got IP Address");
+    ESP_LOGI(TAG, "~~~~~~~~~~~");
+    ESP_LOGI(TAG, "ETHIP:" IPSTR, IP2STR(&ip_info->ip));
+    ESP_LOGI(TAG, "ETHMASK:" IPSTR, IP2STR(&ip_info->netmask));
+    ESP_LOGI(TAG, "ETHGW:" IPSTR, IP2STR(&ip_info->gw));
+    ESP_LOGI(TAG, "~~~~~~~~~~~");
+}
+
+void ethernet_init()
+{
+    // Initialize TCP/IP network interface (should be called only once in application)
+    ESP_ERROR_CHECK(esp_netif_init());
+    // Create default event loop that running in background
+    ESP_ERROR_CHECK(esp_event_loop_create_default());
+
+    // Create new default instance of esp-netif for Ethernet
+    esp_netif_config_t cfg = ESP_NETIF_DEFAULT_ETH();
+    esp_netif_t *eth_netif = esp_netif_new(&cfg);
+
+    // Init MAC and PHY configs to default
+
+    gpio_config_t gpio_cfg = {
+        .pin_bit_mask = 1<<CONFIG_EXAMPLE_ETH_POWER_GPIO,
+        .mode = GPIO_MODE_OUTPUT,
+    };
+    ESP_ERROR_CHECK(gpio_config(&gpio_cfg));
+    ESP_ERROR_CHECK(gpio_set_level(CONFIG_EXAMPLE_ETH_POWER_GPIO, 1));
+
+    eth_mac_config_t esp32_emac_config = ETH_MAC_DEFAULT_CONFIG();
+    esp32_emac_config.smi_mdc_gpio_num = CONFIG_EXAMPLE_ETH_MDC_GPIO;
+    esp32_emac_config.smi_mdio_gpio_num = CONFIG_EXAMPLE_ETH_MDIO_GPIO;
+    esp32_emac_config.sw_reset_timeout_ms = 1000; // 
+    esp32_emac_config.clock_config.rmii.clock_gpio = 0;
+    esp32_emac_config.clock_config.rmii.clock_mode = EMAC_CLK_EXT_IN;
+
+    eth_phy_config_t phy_config = ETH_PHY_DEFAULT_CONFIG();
+    phy_config.phy_addr = 1; // always the first PHY
+    phy_config.reset_gpio_num = -1; // no physical reset
+
+    esp_eth_mac_t *mac = esp_eth_mac_new_esp32(&esp32_emac_config);
+    esp_eth_phy_t *phy = esp_eth_phy_new_lan87xx(&phy_config);
+
+    esp_eth_config_t config = ETH_DEFAULT_CONFIG(mac, phy);
+    esp_eth_handle_t eth_handle = NULL;
+    ESP_ERROR_CHECK(esp_eth_driver_install(&config, &eth_handle));
+    /* attach Ethernet driver to TCP/IP stack */
+    ESP_ERROR_CHECK(esp_netif_attach(eth_netif, esp_eth_new_netif_glue(eth_handle)));
+
+    // Register user defined event handers
+    ESP_ERROR_CHECK(esp_event_handler_register(ETH_EVENT, ESP_EVENT_ANY_ID, &eth_event_handler, NULL));
+    ESP_ERROR_CHECK(esp_event_handler_register(IP_EVENT, IP_EVENT_ETH_GOT_IP, &got_ip_event_handler, NULL));
+
+    /* start Ethernet driver state machine */
+    ESP_ERROR_CHECK(esp_eth_start(eth_handle));
+}

main/ethernet.h

@@ -0,0 +1,6 @@
+#ifndef PORTAL300_ETHERNET_H
+#define PORTAL300_ETHERNET_H
+
+void ethernet_init(void);
+
+#endif

main/io.c

@@ -0,0 +1,64 @@
+#include "io.h"
+
+#include <esp_err.h>
+#include <driver/gpio.h>
+
+#include <freertos/FreeRTOS.h>
+#include <freertos/task.h>
+#include <freertos/atomic.h>
+
+#define PIN_BUTTON GPIO_NUM_39
+#define PIN_DOORBELL GPIO_NUM_15
+
+static const bool button_active_high = false;
+
+static const gpio_config_t button_config = {
+  .pin_bit_mask = (1ULL << PIN_BUTTON),
+  .mode = GPIO_MODE_OUTPUT,
+  .pull_up_en = GPIO_PULLUP_DISABLE,
+  .pull_down_en = GPIO_PULLDOWN_DISABLE,
+  .intr_type = GPIO_INTR_DISABLE,
+};
+
+static const gpio_config_t doorbell_config = {
+  .pin_bit_mask = (1ULL << PIN_DOORBELL),
+  .mode = GPIO_MODE_INPUT,
+  .pull_up_en = GPIO_PULLUP_ENABLE,
+  .pull_down_en = GPIO_PULLDOWN_DISABLE,
+  .intr_type = GPIO_INTR_NEGEDGE,
+};
+
+static volatile uint32_t atomic_doorbell_signal = 0;
+
+static void handle_gpio_interrupt(void*arg)
+{
+  (void)arg;
+
+  // TODO: Debounce this event here!
+
+  // will either set the signal to 1 or will keep it at 1
+  Atomic_CompareAndSwap_u32(&atomic_doorbell_signal, 1, 0);
+}
+
+void io_init()
+{
+  ESP_ERROR_CHECK(gpio_config(&button_config));
+  ESP_ERROR_CHECK(gpio_config(&doorbell_config));
+
+  ESP_ERROR_CHECK(gpio_isr_handler_add(PIN_DOORBELL, handle_gpio_interrupt, NULL));
+
+  ESP_ERROR_CHECK(gpio_set_level(PIN_BUTTON, !button_active_high));
+}
+
+void io_trigger_door_unlock(void)
+{
+  ESP_ERROR_CHECK(gpio_set_level(PIN_BUTTON, button_active_high));
+  vTaskDelay(100 / portTICK_PERIOD_MS); // sleep for 100ms
+  ESP_ERROR_CHECK(gpio_set_level(PIN_BUTTON, !button_active_high));
+}
+
+bool io_was_doorbell_triggered()
+{
+  // Will return 1 if the value swap to 0 happened, otherwise 0.
+  return Atomic_CompareAndSwap_u32(&atomic_doorbell_signal, 0, 1);
+}

main/io.h

@@ -0,0 +1,12 @@
+#ifndef PORTAL300_GPIO_H
+#define PORTAL300_GPIO_H
+
+#include <stdbool.h>
+
+void io_init(void);
+
+void io_trigger_door_unlock(void);
+
+bool io_was_doorbell_triggered();
+
+#endif

main/mqtt.c

@@ -32,7 +32,9 @@ static void log_error_if_nonzero(const char *message, int error_code)
 bool mqtt_pub(char const * topic, char const * data)
 {
   int msg_id = esp_mqtt_client_publish(client, topic, data, 0, 0, 0);
-  ESP_LOGI(TAG, "sent publish successful, msg_id=%d", msg_id);
+  if(msg_id == -1) {
+    ESP_LOGI(TAG, "failed to sent mqtt message to topic '%s', msg_id=%d", topic, msg_id);
+  }
   return (msg_id != -1);
 }
 

main/mqtt.h

@@ -2,11 +2,25 @@
 #define RIIF_MQTT
 
 #include <stdbool.h>
+#include <stddef.h>
 
-void mqtt_init();
+struct MqttEvent {
+  void const *topic;
+  void const *data;
+
+  size_t topic_len;
+  size_t data_len;
+};
+
+typedef void (*MqttEventHandler)(struct MqttEvent *event, void *user_data);
+
+void mqtt_init(void);
 
 bool mqtt_pub(char const *topic, char const *data);
 
 bool is_mqtt_connected(void);
 
+bool mqtt_subscribe(char const *topic, MqttEventHandler handler,
+                    void *user_data);
+
 #endif