Search found 7 matches

by richardwuday
Sun Aug 07, 2022 4:22 pm
Forum: General Discussion
Topic: MQTT starts too slowly
Replies: 6
Views: 4671

Re: MQTT starts too slowly

Can ESP-NOW improve this situation? If so, i am interested in it, and what are the requirements for the MQTT server? As the MQTT server belongs to the operator,and can not be changed.
by richardwuday
Fri Aug 05, 2022 10:07 am
Forum: ESP-IDF 中文讨论版
Topic: MQTT启动太慢
Replies: 1
Views: 1713

MQTT启动太慢

我发现MQTT启动太慢:从调用esp_mqtt_client_start()函数,到返回连接成功,这个过程耗时7秒钟左右。我让服务器端工程师翻查一下登录日志,结果发现从登录连接开始到登录成功只需要花不到1秒钟。也就是说有6秒钟花在MQTT模块自身的初始化上。请问一下这种情况有办法优化一下吗:让整个过程耗时缩短。
by richardwuday
Fri Aug 05, 2022 10:02 am
Forum: General Discussion
Topic: MQTT starts too slowly
Replies: 6
Views: 4671

MQTT starts too slowly

When esp_mqtt_client_start was caleed,it takes 7 seconds to return connected state.Then I found that it took less than 1 second to connect from the beginning to return OK. Is there any way to shorten the time ahead?
by richardwuday
Wed Mar 30, 2022 3:59 pm
Forum: ESP-IDF 中文讨论版
Topic: ESP32-S2FN4R2烧录不了
Replies: 0
Views: 1668

ESP32-S2FN4R2烧录不了

我用ESP32-S2FN4R2芯片设计出来的板焊上ESP32-S2FN4R2后烧录不了,已经换过2片芯片了还是烧录不了,不知道是什么原因:IO0上电前已经接地了,IO18上电前也已经上拉10K电阻了,烧录脚是48、49脚(U0RXD,U0TXD),56脚也已经上拉高电平了。而我之前购买的ESP32-S2模组设计出来的板就能烧录。
by richardwuday
Wed Dec 08, 2021 10:36 am
Forum: ESP-IDF 中文讨论版
Topic: usb cam driver
Replies: 0
Views: 2954

usb cam driver

想要连接USB CAM,怎么获取到usb driver呢
by richardwuday
Thu Nov 11, 2021 12:44 am
Forum: General Discussion
Topic: modem(esp32+sim800c) stopped after recieved a packet
Replies: 0
Views: 1434

modem(esp32+sim800c) stopped after recieved a packet

board:esp32+sim800c,demo:Pppos_client,i found a problem:modem stopped after recieved a pcket,that will happen every time.This confused me. Is sim800c can't fit this demo? Can someone give some advice?here is the log: start up: [0;32mI (1141) pppos_example: GOT ip event!!![0m [0;32mI (1151) pppos_exa...
by richardwuday
Wed Nov 10, 2021 7:13 am
Forum: ESP-IDF 中文讨论版
Topic: esp32+sim800c接收到1包数据后就断开了
Replies: 1
Views: 3057

esp32+sim800c接收到1包数据后就断开了

环境是ESP32+SIM800C的硬件,运行的是Pppos client_main的例子。发现每次接收到MQTT下发的命令后,modem就断开了。如下的log: [0;32mI (1141) pppos_example: GOT ip event!!![0m [0;32mI (1151) pppos_example: PPP state changed event 266[0m [0;32mI (1161) pppos_example: MQTT other event id: 7[0m 【2021-11-10 13:45:41:738】[0;32mI (2451) pppos_example...