I tried the example code, and the last days it ran successful.
Today i get certificate X.509 error when trying do download binary.

Maybe bintray changed some of it certificates which are copied in BintrayCertificates.h?
How can i check this?

How can we change a certificate on a node, after bintray made changes on their server side certificates?
How do we handle certifcate renewals?

I'm trying to setup firmware update via bintray & platformIO, using the example code.
I created user, repository and package, uploaded a .bin file, and gave it a version.
Wifi connection and ssl login to bintray are successful.
But can't download it with the library to my ESP32:

[I][BintrayClient.cpp:121] getLatestVersion(): Error: Could not parse JSON!
[I][SecureOTA.cpp:46] checkFirmwareUpdates(): Could not load info about the latest firmware, so nothing to update. Continue

Any hints what i am doing wrong? Or is it a bug?

I find the video hard to follow, and it doesn't really help me understand what is happening. Is there a proper step-by-step instruction that a script kiddy like me can follow?

Bintray will shutdown soon - see their info here.
What cloud platform should we use instead of Bintray?

When I try to compile, I get the following error:

lib\BintrayClient\src\BintrayClient.cpp:115:11: error: StaticJsonBuffer is a class from ArduinoJson 5. Please see arduinojson.org/upgrade to learn how to upgrade your program to ArduinoJson version 6
     StaticJsonBuffer<bufferSize> jsonBuffer;

Now I guess the error is my "wrong" ArduinoJson version, but wouldn't it be nice if your code ran with the latest ArduinoJson version?

I watched the video about JFrog Bintray and tried to make it work here. Follow the steps that I did:

1. Created an account on Bintray
2. Created a repository called WStation
3. Created a package called bintray-secure-ota
4. Cloned your sample code
5. Changed platformio.ini to:

[bintray]
user = 
repository = WStation
package = bintray-secure-ota
api_token =

[wifi]
ssid = 
password =

release_version = 1
…

When env_default setting (in platformio.ini) is set to release, it uploads the code to bintray. It is working. When I set the env_default to debug and uploaded the firmware to the ESP32, the terminal shows the following log:

Device version: v.0
Connecting to … connected!
IP address: 192.168.100.126
[E][ssl_client.cpp:33] handle_error(): X509 - Certificate verification failed, e.g. CRL, CA or signature check failed
[E][ssl_client.cpp:35] handle_error(): MbedTLS message code: -9984
[E][WiFiClientSecure.cpp:109] connect(): start_ssl_client: -9984
GET request failed, error, connection refused
Error: Could not parse JSON!
Could not load info about the latest firmware, so nothing to update. Continue …

How can I handle this issue?

BintrayClient.cpp is using ArduinoJson 5.x. This makes it difficult to integrate bintray-secure-ota in projects which use/need ArduinoJson 6.x.

And here is another one...
AttributeError: module 'platformio.util' has no attribute 'load_project_config':
This happens when calling
project_config = util.load_project_config()
in publish_firmware.py.

Any hints?

I'm trying to upload firmware files with platformIO, but i always run on error:

CURRENT: upload_protocol = custom
Uploading .pioenvs\release\firmware_v_1.bin
Uploading firmware_v_1.bin to Bintray. Version: 1
Failed to submit package: 401
{"message":"This resource requires authentication"}

API-token is set in platformio.ini

If the upload to bintray fails, there is no return code from publish_firmware causing the overall pio execution to declare SUCCESS, even though it failed. How can publish_firmware return an error?

@ivankravets Thanks for the platformio - bintray enhancement!

I installed bintray-secure-ota by
lib_deps_ota = https://github.com/platformio/bintray-secure-ota.git
in my platformio.ini

It did install after first time building my code

Dependency Graph
|-- <ArduinoJson> 5.13.2
|-- <bintray-secure-ota> #d0899cd
|   |-- <Update> 1.0
|   |-- <WiFi> 1.0
|   |-- <WiFiClientSecure> 1.0
|   |   |-- <WiFi> 1.0

but the library manager cannot find BintrayClient.h by inlude in my OTA.h:

#include <BintrayClient.h>

In file included from src\OTA.cpp:18:0:
src\OTA.h:9:27: fatal error: BintrayClient.h: No such file or directory

***********************************************************************
* Looking for BintrayClient.h dependency? Check our library registry!
*
* CLI  > platformio lib search "header:BintrayClient.h"
* Web  > https://platformio.org/lib/search?query=header:BintrayClient.h
*
***********************************************************************

compilation terminated.

I want to select package name for bintray upload path in platformio.ini by using the current environment name.

e.g.

[env:esp32heltec]
...

[bintray]
package = ${sysenv.PIOENV}

but this does not work this way.