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mqtt_client: Added MQTTClientComponent::unsubscribe() (#1672)
Co-authored-by: Otto Winter <otto@otto-winter.com>
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2 changed files with 29 additions and 0 deletions
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@ -347,6 +347,26 @@ void MQTTClientComponent::subscribe_json(const std::string &topic, mqtt_json_cal
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this->subscriptions_.push_back(subscription);
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}
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void MQTTClientComponent::unsubscribe(const std::string &topic) {
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uint16_t ret = this->mqtt_client_.unsubscribe(topic.c_str());
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yield();
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if (ret != 0) {
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ESP_LOGV(TAG, "unsubscribe(topic='%s')", topic.c_str());
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} else {
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delay(5);
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ESP_LOGV(TAG, "Unsubscribe failed for topic='%s'.", topic.c_str());
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this->status_momentary_warning("unsubscribe", 1000);
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}
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auto it = subscriptions_.begin();
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while (it != subscriptions_.end()) {
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if (it->topic == topic)
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it = subscriptions_.erase(it);
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else
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++it;
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}
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}
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// Publish
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bool MQTTClientComponent::publish(const std::string &topic, const std::string &payload, uint8_t qos, bool retain) {
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return this->publish(topic, payload.data(), payload.size(), qos, retain);
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@ -159,6 +159,15 @@ class MQTTClientComponent : public Component {
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*/
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void subscribe_json(const std::string &topic, mqtt_json_callback_t callback, uint8_t qos = 0);
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/** Unsubscribe from an MQTT topic.
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*
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* If multiple existing subscriptions to the same topic exist, all of them will be removed.
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*
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* @param topic The topic to unsubscribe from.
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* Must match the topic in the original subscribe or subscribe_json call exactly.
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*/
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void unsubscribe(const std::string &topic);
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/** Publish a MQTTMessage
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*
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* @param message The message.
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