Function esp_idf_svc::sys::esp_mqtt_client_unsubscribe
source ยท pub unsafe extern "C" fn esp_mqtt_client_unsubscribe(
client: *mut esp_mqtt_client,
topic: *const i8,
) -> i32
Expand description
@brief Unsubscribe the client from defined topic
Notes:
- Client must be connected to send unsubscribe message
- It is thread safe, please refer to
esp_mqtt_client_subscribe_single
for details
@param client MQTT client handle @param topic
@return message_id of the subscribe message on success -1 on failure