Merge pull request #223 from DavidLin1577/patch-13

Update esp8266_tencent_firmware.c
2020-08-11 18:58:09 +08:00
parent e07af21795 fbe69ca3f8
commit e32fb2f04e
1 changed files with 4 additions and 0 deletions
--- a/devices/esp8266_tencent_firmware/esp8266_tencent_firmware.c
+++ b/devices/esp8266_tencent_firmware/esp8266_tencent_firmware.c
@@ -130,6 +130,10 @@ int esp8266_tencent_firmware_module_mqtt_state_get(mqtt_state_t *state)
    }

    str = strstr(echo.buffer, "+TCMQTTSTATE:");
+    if (!str) 
+    {
+        return -1;
+    }
    sscanf(str, "+TCMQTTSTATE:%d", &ret_state);
    if (ret_state == 0) {
        *state = MQTT_STATE_DISCONNECTED;