Hi zliudr,
I believe the documentation is correct. In the C language, "strings" are null byte terminated. So the hostname parameter is 32 bytes including the null byte.
Feel free to post any follow-up questions.
Jan
Search found 42 matches
- Thu Mar 11, 2021 12:23 pm
- Forum: ESP-IDF
- Topic: esp_netif_set_hostname() doc host name max length should be 31. Incorrect doc
- Replies: 2
- Views: 3611
- Thu Mar 11, 2021 11:49 am
- Forum: ESP-IDF
- Topic: ESP32 MQTT EVENT ERROR
- Replies: 1
- Views: 3095
Re: ESP32 MQTT EVENT ERROR
Hello, the header file is here: https://github.com/espressif/esp-mqtt/blob/master/include/mqtt_client.h and can be found in your IDF instalation in this location: {$IDF_PATH}/components/mqtt/esp-mqtt/include/mqtt_client.h Please also take a look at this API reference to check your error codes (0x801...
- Wed Jan 20, 2021 11:40 am
- Forum: ESP-IDF
- Topic: Overview about all functions in C/C++ Framework
- Replies: 2
- Views: 3267
Re: Overview about all functions in C/C++ Framework
Hi BergLoewe,
are you looking for the API reference?
https://docs.espressif.com/projects/esp ... index.html
Be sure to select your IDF version and chip in the lower left corner.
Jan
are you looking for the API reference?
https://docs.espressif.com/projects/esp ... index.html
Be sure to select your IDF version and chip in the lower left corner.
Jan
- Thu Jan 14, 2021 5:17 pm
- Forum: ESP IoT Solution
- Topic: OTA from Dropbox
- Replies: 2
- Views: 6940
Re: OTA from Dropbox
Hi John, you can use any webhosting/filehosting service that offers a direct link to the file (so no page with a download button). It may be possible to do this using dropbox by using a direct link. However, dropbox will redirect you to the actual file which may not work with the OTA updates. Also I...
- Thu Jan 14, 2021 5:09 pm
- Forum: ESP-IDF
- Topic: Bluetooth HID Host Getting Duplicate Events and Extra Event
- Replies: 3
- Views: 4232
Re: Bluetooth HID Host Getting Duplicate Events and Extra Event
Hi Derf Jagged, the extra packets may be controller status information (like the state of charge, firmware version, signal strength, etc.) I wasn't able to find much information on the Bluetooth protocol, but this page has information about the proprietary wireless communication protocol https://gis...
- Mon Jan 04, 2021 5:50 am
- Forum: ESP-IDF
- Topic: build errors in ESP-IDF
- Replies: 1
- Views: 3425
Re: build errors in ESP-IDF
Hi Arnie,
this looks as though you cloned the esp-idf repository and missed the --recursive option.
To fix this, run the following command inside your esp-idf directory.
Jan
this looks as though you cloned the esp-idf repository and missed the --recursive option.
To fix this, run the following command inside your esp-idf directory.
Code: Select all
git submodule update --init
- Mon Jan 04, 2021 5:38 am
- Forum: ESP-IDF
- Topic: Trying to make component folder work
- Replies: 7
- Views: 6968
Re: Trying to make component folder work
Hi zliudr,
be sure to check the documentation on the build system, mainly the example project to get to know how the components work in the build system.
Jan
be sure to check the documentation on the build system, mainly the example project to get to know how the components work in the build system.
Jan
- Thu Dec 31, 2020 6:20 pm
- Forum: ESP-IDF
- Topic: Monitoring Error.
- Replies: 2
- Views: 3989
Re: Monitoring Error.
Hi DutchOrange,
this may be due to:
If that doesn't help, then try a different USB port and/or another USB cable.
Jan
this may be due to:
- use of the wrong serial port
- another program using the serial port
- bad USB connection or cable
- the USB device resetting
If that doesn't help, then try a different USB port and/or another USB cable.
Jan
- Wed Dec 30, 2020 1:20 pm
- Forum: ESP-IDF
- Topic: How to operate MG811 CO2 Sensor on ESP32
- Replies: 2
- Views: 4839
Re: How to operate MG811 CO2 Sensor on ESP32
Hi os3n6c,
based on the specifications the MG811 sensor requires 6.0V ± 0.1V @200mA for its operation.
You will need to have a 6V power supply for this sensor or a voltage regulator.
Feel free to post any follow-up questions
Jan
based on the specifications the MG811 sensor requires 6.0V ± 0.1V @200mA for its operation.
You will need to have a 6V power supply for this sensor or a voltage regulator.
Feel free to post any follow-up questions
Jan
- Wed Dec 30, 2020 12:58 pm
- Forum: ESP-IDF
- Topic: Enable double precision trigonometric functions
- Replies: 6
- Views: 11029
Re: Enable double precision trigonometric functions
Hi alsaleem00, ESP32 does not support hardware acceleration for double precision floating point arithmetic (double). Instead double is implemented via software hence the behavioral restrictions with regards to float do not apply to double. Note that due to the lack of hardware acceleration, double o...