Search found 48 matches

by littlesky
Tue Nov 27, 2018 2:11 am
Forum: General Discussion
Topic: Wi-Fi RTT (IEEE 802.11mc) on ESP32
Replies: 7
Views: 1500

Re: Wi-Fi RTT (IEEE 802.11mc) on ESP32

Would you like to use WiFi RTT for distance measurement? ESP32 does not support it and there is no plan to implement it now. We suggest to use channel state information which can also be used to measure distance. And it is already supported in esp-idf.
by littlesky
Thu Nov 22, 2018 1:05 pm
Forum: ESP-IDF 中文讨论版
Topic: 将 CoreMark CPU跑分程序移植到 ESP32 上
Replies: 3
Views: 1196

Re: 将 CoreMark CPU跑分程序移植到 ESP32 上

Is there any comparison with other CPUs?
by littlesky
Thu Nov 22, 2018 3:12 am
Forum: General Discussion
Topic: Wi-Fi RTT (IEEE 802.11mc) on ESP32
Replies: 7
Views: 1500

Re: Wi-Fi RTT (IEEE 802.11mc) on ESP32

esp-idf has supported channel state information which is the basis of WiFi RTT since idfv3.1. But protocol stack of WiFi RTT is not supported yet. For channel state information, please refer to WiFi documentation wifi.rst in esp-idf directory.
by littlesky
Tue Sep 18, 2018 8:04 am
Forum: ESP32 IDF
Topic: Smart Config issues...
Replies: 3
Views: 2509

Re: Smart Config issues...

ESP32 do not support to receive packets on 5GHz band. That means if router is 5GHz only, smartconfig will never succeed. If smart phone connects to 5G, Smart config works if the following conditions are satisfied: 1. The SSIDs of 2.4G and 5G are the same. 2. Update IDF to v3.2 which will be released...
by littlesky
Mon May 28, 2018 6:26 am
Forum: ESP32 IDF
Topic: MQTT with Secure connection disconnection issue with IDFv3.0
Replies: 7
Views: 1622

Re: MQTT with Secure connection disconnection issue with IDFv3.0

I guess that it may be caused by the IP address. In IDF v2.1, IP address is lost once WiFi disconnects. But in IDF v3.0, IP address keeps unchanged in 120 seconds after WiFi disconnects. Due to IP address is unchanged, TCP connections bound on it are not changed.
by littlesky
Sun May 27, 2018 2:58 am
Forum: ESP32 IDF
Topic: ESP32 getting disconnected after some data transaction with AZURE IOT
Replies: 9
Views: 1765

Re: ESP32 getting disconnected after some data transaction with AZURE IOT

First, you need a WiFi card which can capture WiFi packets. Second, install software Omnipeek or Wireshark on your PC. Then you can use it to capture WiFi packets. The disconnect reason can be obtained when receiving SYSTEM_EVENT_STA_DISCONNECTED event. It is defined in struct in esp_event.h: typede...
by littlesky
Fri Jun 09, 2017 9:17 am
Forum: ESP32 IDF
Topic: Minimizing power consumption while connected to WiFi
Replies: 6
Views: 7842

Re: Minimizing power consumption while connected to WiFi

Hi, 1. 20 mA for modem sleep is measured in test mode on the chip. "Max speed" means high CPU frequency. "Normal speed" means middle CPU frequency. "Slow speed" means low CPU frequency. CPU frequency can be changed during modem sleep in order to reduce current. 2. It is a feature in IDF. We can call...
by littlesky
Fri Jun 09, 2017 9:01 am
Forum: General Discussion
Topic: The modem sleep mode has a slow state with current only 3mA.
Replies: 3
Views: 2703

Re: The modem sleep mode has a slow state with current only 3mA.

The current on slow state is measured in test mode. This document means that the hardware of our chip does support this feature that reduces current when cpu works on slow state. But the IDF has not implemented the whole function yet. This function can not be found in our release notes of IDFv0.9~v2...