Search found 294 matches

by jcsbanks
Sat Mar 21, 2020 11:42 am
Forum: ESP32 IDF
Topic: AWS S3 - root certificate changing
Replies: 0
Views: 518

AWS S3 - root certificate changing

I received an email from AWS saying that the root certificate for some S3 regions was going to change from March 2021. Frequently Asked Questions Q1: What is changing? The certificate authority for Amazon S3 and Amazon CloudFront’s default certificates are changing from DigiCert to Amazon Trust Serv...
by jcsbanks
Thu Mar 05, 2020 11:14 pm
Forum: ESP32 IDF
Topic: httpd: serving gzip index.html
Replies: 2
Views: 475

Re: httpd: serving gzip index.html

Thanks!
by jcsbanks
Thu Mar 05, 2020 8:34 pm
Forum: ESP32 IDF
Topic: httpd: serving gzip index.html
Replies: 2
Views: 475

httpd: serving gzip index.html

I have an index.html that has grown to 88KB but will gzip to 23KB. ESP-IDF 3.3 release. If there anything I can do without digging into and modifying the httpd source code to signal that the file being served is gzipped? esp_err_t index_html_get_handler(httpd_req_t *req) { httpd_resp_send(req, (cons...
by jcsbanks
Fri Dec 20, 2019 9:29 am
Forum: ESP32 IDF
Topic: APSTA - time before network shows in Windows
Replies: 0
Views: 247

APSTA - time before network shows in Windows

What settings (if any) might influence the time it takes for the AP to show in Windows or Android when they scan for networks? It can take a few seconds to appear even when the ESP32 has been powered for a while.

ESP IDF 3.3.
by jcsbanks
Tue Dec 17, 2019 1:47 pm
Forum: General Discussion
Topic: power save in esp32 with running can bus
Replies: 11
Views: 1123

Re: power save in esp32 with running can bus

AFAIK you cannot power save whilst being able to receive on CAN without losing data, unless the ESP32 is the only device on the bus doing the ACK, then there should be retransmits. You can wake the ESP32 on CAN bus activity due to change in level on the Rx pin.
by jcsbanks
Wed Nov 27, 2019 9:21 am
Forum: ESP32 IDF
Topic: Store Certificates in encrypted partition , how ?
Replies: 5
Views: 630

Re: Store Certificates in encrypted partition , how ?

NVS as blob to avoid string limit. There is an Espressif tool to make NVS partition data.
by jcsbanks
Tue Nov 26, 2019 8:45 am
Forum: ESP32 IDF
Topic: Experiement to load/execute compiled C code into RAM
Replies: 8
Views: 1798

Re: Experiement to load/execute compiled C code into RAM

It worked, but I did not continue using it. Doing an OTA update of all the code and data together was easier to use and support for our application. Run time scripts were small and fast by parsing them with std::string so did not have to bulk it with and learn Lua etc.
by jcsbanks
Tue Nov 19, 2019 9:41 am
Forum: General Discussion
Topic: OTA of factory image
Replies: 4
Views: 661

Re: OTA of factory image

Dev boards from various sources might have firmware, but modules we had from Espressif directly do not and this is the standard AFAIK.
by jcsbanks
Fri Nov 15, 2019 9:52 am
Forum: General Discussion
Topic: Is it recommended/practical to use C++ instead of plain C ?
Replies: 12
Views: 1425

Re: Is it recommended/practical to use C++ instead of plain C ?

I use std::map, std::string, std::vector, find and iterators. The error messages are not nice and some things need just as much care for memory management as malloc/free because you can easily run out of PSRAM, it comes down to design and algorithm, and appropriate use and I would not criticise C++ ...

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