使用物理设备时无法连接到 MQTT Broker

Question

这是我正在尝试的代码运行:

import mqtt
import net
import tls
import net.x509
import device
import encoding.json


// Unique MQTT client ID to identify each client that connects to the MQTT broker.
CLIENT_ID ::= "$device.hardware_id"
// The publicly available Mosquitto MQTT server/broker is used in this example.
HOST      ::= "..."
// MQTT port 
PORT      ::= 8883
// MQTT topic name
TOPIC     ::= "..."

main:
  socket := net.open.tcp_connect HOST PORT
  tls_cert := tls.Certificate CLIENT_CERT PRIVATE_KEY
  tls_socket := tls.Socket.client socket
    --server_name=HOST
    --root_certificates=[SERVER_CERT]
    --certificate=tls_cert
    

  tls_socket.handshake

  client := mqtt.Client
    CLIENT_ID
    mqtt.TcpTransport tls_socket

  // Client is now connected.
  print "connected to $HOST"
  // Start subscribing to a topic.
  subscribe client  
  print "Subscribed to client"
  task:: my_task_1
  // Process subscribed messages.
  client.handle: | topic/string payload/ByteArray |
    decoded := json.decode payload
    print "Received message '$(decoded)' on '$topic'"

    // Stop after first message.
    //return

// Test task
my_task_1:
  while true:
    sleep --ms=5000
    print "task 1 is running"
 
subscribe client/mqtt.Client:
  // Subscripe to a topic
  client.subscribe TOPIC --qos=1
  print "Subscribed to topic '$TOPIC'"

它在模拟设备上运行良好，但运行在 ESP32-WROOM-32UE 上运行它会抛出以下错误：

EXCEPTION error. 
MALLOC_FAILED
  0: tls_handshake_            <sdk>/tls/session.toit:214:3
  1: Session.handshake.<block> <sdk>/tls/session.toit:99:9
  2: Session.handshake         <sdk>/tls/session.toit:79:3
  3: Socket.handshake          <sdk>/tls/socket.toit:53:5
  4: main                      /c:/.../MQTT/tls_connect.toit:29:14
  5: __entry__.<lambda>        <sdk>/core/entry.toit:46:20

我已经尝试了多个相同型号的不同设备，并且我上传到这些设备的所有其他代码都按预期工作。

我已经从代码中删除了证书和个人路径

Answer 1

当运行基于 TLS 的 MQTT 与 Toit 云的主要连接同时进行时，系统有相当多的网络缓冲区在运行。这意味着内存水印比平时略高，使系统比以前更进一步。

我们正在优化这些场景中的内存使用，以及更好地将 malloc 实现与 GC 集成，以更好地处理这些情况。我怀疑 1.5（计划于本月发布）将在这里有重大改进。

使用物理设备时无法连接到 MQTT Broker

Failing to connect to MQTT Broker when using physical device

mqtt

toit