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feat: implement OTA updates over HTTP(S), initiated over MQTT

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This commit is contained in:
dvdrw
2026-05-17 00:24:43 +02:00
parent 8992e311ba
commit b9195a0dda
10 changed files with 221 additions and 8 deletions
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components/mqtt_publisher/include/mqtt_publisher.h
+13
View File
@@ -13,6 +13,7 @@
#define MQTT_DESELECTED_BIT BIT4
#define MQTT_FACTORY_RESET_BIT BIT5
#define MQTT_RECONFIGURE_SETTINGS_BIT BIT6
#define MQTT_OTA_BIT BIT7
/* Populated by handle_cmd() before MQTT_RECONFIGURE_SETTINGS_BIT is set.
* All fields are optional — empty string means "not provided, leave unchanged". */
@@ -27,6 +28,18 @@ typedef struct {
* MQTT_RECONFIGURE_SETTINGS_BIT fires; must be read before the next MQTT event. */
const mqtt_reconfigure_data_t *mqtt_publisher_get_reconfigure_data(void);
typedef struct {
char url[256];
char version[32];
} mqtt_ota_data_t;
/** Returns a pointer to the last parsed OTA payload. Valid only after
* MQTT_OTA_BIT fires; must be read before the next MQTT event. */
const mqtt_ota_data_t *mqtt_publisher_get_ota_data(void);
/** Publish OTA status to localiser/sensor/{id}/ota. Non-blocking (QoS 1). */
void mqtt_publisher_send_ota_status(const char *status, const char *version);
/**
* Initialise and connect the MQTT client.
*
components/mqtt_publisher/src/mqtt_publisher.c
+32 -1
View File
@@ -7,21 +7,29 @@
#define TAG "mqtt_publisher"
#define TOPIC_PREFIX "localiser/sensor"
#define TOPIC_OTA_BROADCAST "localiser/ota"
static esp_mqtt_client_handle_t s_client = NULL;
static char s_sensor_id[32];
static EventGroupHandle_t s_evt = NULL;
static mqtt_reconfigure_data_t s_reconfigure_data;
static mqtt_ota_data_t s_ota_data;
const mqtt_reconfigure_data_t *mqtt_publisher_get_reconfigure_data(void)
{
return &s_reconfigure_data;
}
const mqtt_ota_data_t *mqtt_publisher_get_ota_data(void)
{
return &s_ota_data;
}
/* Pre-built topic strings */
static char s_topic_rssi[96];
static char s_topic_announce[96];
static char s_topic_cmd[96];
static char s_topic_ota[96];
static void build_topics(void)
{
@@ -31,6 +39,8 @@ static void build_topics(void)
"%s/%s/announce", TOPIC_PREFIX, s_sensor_id);
snprintf(s_topic_cmd, sizeof(s_topic_cmd),
"%s/%s/cmd", TOPIC_PREFIX, s_sensor_id);
snprintf(s_topic_ota, sizeof(s_topic_ota),
"%s/%s/ota", TOPIC_PREFIX, s_sensor_id);
}
static void handle_cmd(const char *data, int data_len)
@@ -50,6 +60,15 @@ static void handle_cmd(const char *data, int data_len)
else if (strcmp(a, "selected") == 0) xEventGroupSetBits(s_evt, MQTT_SELECTED_BIT);
else if (strcmp(a, "deselected") == 0) xEventGroupSetBits(s_evt, MQTT_DESELECTED_BIT);
else if (strcmp(a, "factory_reset") == 0) xEventGroupSetBits(s_evt, MQTT_FACTORY_RESET_BIT);
else if (strcmp(a, "ota") == 0) {
memset(&s_ota_data, 0, sizeof(s_ota_data));
cJSON *url_j = cJSON_GetObjectItemCaseSensitive(root, "url");
cJSON *ver_j = cJSON_GetObjectItemCaseSensitive(root, "version");
if (cJSON_IsString(url_j)) strncpy(s_ota_data.url, url_j->valuestring, sizeof(s_ota_data.url) - 1);
if (cJSON_IsString(ver_j)) strncpy(s_ota_data.version, ver_j->valuestring, sizeof(s_ota_data.version) - 1);
if (s_ota_data.url[0] != '\0') xEventGroupSetBits(s_evt, MQTT_OTA_BIT);
else ESP_LOGW(TAG, "OTA cmd missing url");
}
else if (strcmp(a, "reconfigure_settings") == 0) {
memset(&s_reconfigure_data, 0, sizeof(s_reconfigure_data));
cJSON *ssid_j = cJSON_GetObjectItemCaseSensitive(root, "ssid");
@@ -75,6 +94,7 @@ static void mqtt_event_handler(void *arg, esp_event_base_t base,
case MQTT_EVENT_CONNECTED:
ESP_LOGI(TAG, "Connected to broker");
esp_mqtt_client_subscribe(s_client, s_topic_cmd, 1);
esp_mqtt_client_subscribe(s_client, TOPIC_OTA_BROADCAST, 1);
xEventGroupSetBits(s_evt, MQTT_CONNECTED_BIT);
mqtt_publisher_announce();
break;
@@ -85,7 +105,8 @@ static void mqtt_event_handler(void *arg, esp_event_base_t base,
break;
case MQTT_EVENT_DATA:
if (strncmp(event->topic, s_topic_cmd, event->topic_len) == 0) {
if (strncmp(event->topic, s_topic_cmd, event->topic_len) == 0 ||
strncmp(event->topic, TOPIC_OTA_BROADCAST, event->topic_len) == 0) {
handle_cmd(event->data, event->data_len);
}
break;
@@ -150,3 +171,13 @@ void mqtt_publisher_send_beacon(const char *type, const char *id, int8_t tx_powe
type, id, (int)tx_power, (int)rssi);
esp_mqtt_client_publish(s_client, s_topic_rssi, payload, len, 1, 0);
}
void mqtt_publisher_send_ota_status(const char *status, const char *version)
{
if (!s_client) return;
char payload[96];
int len = snprintf(payload, sizeof(payload),
"{\"status\":\"%s\",\"version\":\"%s\"}", status, version ? version : "");
esp_mqtt_client_publish(s_client, s_topic_ota, payload, len, 1, 0);
}