Search found 1643 matches

by chegewara
Thu Sep 23, 2021 8:06 am
Forum: ESP-IDF
Topic: ESP32 BLE suggestions for streaming EEG sensor data to Android
Replies: 4
Views: 248

Re: ESP32 BLE suggestions for streaming EEG sensor data to Android

3MB file is a big file in meaning of BLE usage. It takes few minutes to transfer it. In that case BT classic would be better option.
by chegewara
Wed Sep 22, 2021 10:44 pm
Forum: ESP32 Arduino
Topic: ESP32 MQTT API issue
Replies: 2
Views: 133

Re: ESP32 MQTT API issue

static void mqtt_event_handler(void *handler_args, esp_event_base_t base, int32_t event_id, void *event_data) { ... esp_mqtt_client_handle_t client = event_data->client; // event_data is type of (void* event_data), so you have to explicit cast it to some other type; but what type? you have to know ...
by chegewara
Wed Sep 22, 2021 3:09 pm
Forum: ESP-IDF
Topic: ESP32 BLE suggestions for streaming EEG sensor data to Android
Replies: 4
Views: 248

Re: ESP32 BLE suggestions for streaming EEG sensor data to Android

I dont want to suggest any comm protocol, but this is what i found with very quick search: - Brain Activity Monitoring: Sullivan and all. [21] proposed a brain activity monitoring system using the non-invasive electroencephalogram EEG sensor that measures the neural electrical activity of the brain ...
by chegewara
Wed Sep 22, 2021 3:03 pm
Forum: ESP-IDF
Topic: OTA update : 2 partitions one with OTA program and second with application program
Replies: 3
Views: 150

Re: OTA update : 2 partitions one with OTA program and second with application program

shirogeek wrote: I'm running a 1M factory and 6M OTA APP this way.
Thanks again for all the clarification
You probably will learn this hard way, but as far as i know esp32 wont handle that big application. IIRC limit is around 3MB.
by chegewara
Sun Sep 19, 2021 5:58 am
Forum: IDEs for ESP-IDF
Topic: ESP-IDF can't find Arduino components
Replies: 1
Views: 277

Re: ESP-IDF can't find Arduino components

As I have said in another thread,, idf.py menuconfig don't work form me. So,, which "step" am I missing ??? (As far I know, WiFi should be a valid component) Who told you idf.py menuconfig wont work? Maybe it is misunderstanding and it was about plain arduino project? The idf.py menuconfig has some...
by chegewara
Fri Sep 17, 2021 10:55 am
Forum: ESP IoT Solution 中文讨论版
Topic: esp32-s2-usb-host-cdc 示例程序接收错误问题
Replies: 1
Views: 307

Re: esp32-s2-usb-host-cdc 示例程序接收错误问题

Are you using example from my repository by any chance? That repository is mark as archived, because USB host API in esp-idf evaluated and here you can find new library with examples which works with esp-idf master: https://github.com/chegewara/esp32-usb-host and here is docs if you would like to wr...
by chegewara
Fri Sep 17, 2021 10:29 am
Forum: ESP-IDF
Topic: How to send different Bluetooth beacons every ms?
Replies: 3
Views: 293

Re: How to send different Bluetooth beacons every ms?

Draining the battery is not a problem for me. Maybe not for you, but for mobile devices that will do the scan. Like i said, the whole point of BLE vs classic BT is to not drain battery, thus the name (LE stands for low energy). Imagine the case where your ESP32 board is lying in a field in the midd...
by chegewara
Fri Sep 17, 2021 9:43 am
Forum: ESP-IDF
Topic: How to send different Bluetooth beacons every ms?
Replies: 3
Views: 293

Re: How to send different Bluetooth beacons every ms?

There is no point (and no option) to change advertised data every 1ms. Why: - usually applications that scan/search for beacons do it with rate 100ms+, why? thats the whole point of BLE, to not drain battery with scan and/or advertising, - i dont remember now from top of my head, but minimum scan/ad...
by chegewara
Wed Sep 15, 2021 2:24 am
Forum: ESP-IDF
Topic: Bluetooth Classic HID
Replies: 4
Views: 236

Re: Bluetooth Classic HID

1) there is BT classic HID host and HID device API in esp-idf already for quite some time as far as i know, 2) i dont want to argue, but i believe new version of PS4 controller is using BLE As to esp-idf, here you can find examples: https://github.com/espressif/esp-idf/tree/master/examples/bluetooth...
by chegewara
Tue Sep 14, 2021 7:13 am
Forum: General Discussion
Topic: Need help using ESP32 flash download tool
Replies: 1
Views: 336

Re: Need help using ESP32 flash download tool

It all depends how you build binaries. When you are working with esp-idf and build with "idf.py build" then after success build you can see output similar to this (its from linux): /home/chegewara/.espressif/python_env/idf4.4_py3.8_env/bin/python ../../../components/esptool_py/esptool/esptool.py -p ...

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