Support for Blynk + STM32 + SIM808 (GSM)

[mahmoud.metwally]

I’m working on an Iot project where i need to interface GSM module with STM32 and Blynk, but i can’t find any supported packages for the stm32 only finds for Arduino, what should i do?

[PeteKnight]

Have you tried searching this forum?

Pete.

[vshymanskyy]

Blynk library implementation is highly portable. You need several basic things to port it to any platform:

• APIs for socket connection (TCP, preferably with TLS) like send, recv, connect, close
• Ability to compile/link limited C++ (no rtti, exceptions, stl, etc)

Having this, it should take no longer than 1 day to integrate the Blynk protocol.

Cellular connectivity doesn’t require dynamic credentials provisioning implementation.

[mahmoud.metwally]

Thank you for your reply, but i don’t find it clear enough since the Blynk library at GitHub is totally dependent on the Arduino Platform

[mahmoud.metwally]

I would like to have documentation on how the implementation goes using MQTT

[vshymanskyy]

Direct MQTT connections are not supported by Blynk atm. We consider Blynk protocol superior to MQTT:

New MQTT 5 spec is coming

[Blynk-vs-MQTT] Blue line represents Blynk library rating on github. Red is the most popular MQTT library for Arduino. When we started creating Blynk, there was no adequate MQTT implementations for Arduino. Besides that, we investigated MQTT 3.1.1 and found that it didn’t fit our requirements. So we made a decision to create our own protocol. But we’re now waiting for MQTT 5! Good to see that MQTT is getting a lot of features, that we’re enjoying at Blynk fo…

If absolutely needed, you should be able to use Node-Red to integrate with Blynk, i.e.:

My home automation projects built with MQTT and Node Red

I thought I’d start a topic about some of the home automation things I’m doing with Blynk. We live in London, England, and also have a holiday home in Spain where we spend around 4 months of the year. Most of my home automation projects are based in the Spanish home and are aimed at simplifying day-to-day life while we’re there. My wife is disabled, and finds new technology a bit of a challenge, so all the projects that I’ve created are aimed at being practical, easy to use and reliable. Lets …

However this workflow is broken in Blynk 2.0 (but we are working on improving this).

[mahmoud.metwally]

Would you please provide a documentation on how to implement Blynk Library on STM32F103C8T6 (Blue Pill) since it’s from the supported devices.
I have found a difficulty on how to use the Blynk library since it’s totally dependent on the Arduino platform (Avr)

[vshymanskyy]

@mahmoud.metwally

STM32F103C8T6

Multiple options are possible:

1. You can use Arduino framework on Blue Pill. With this setup, you can use TinyGSM as TCP/SSL API provider.
2. Use your own drivers for the modem, tcp, ssl. Use blynk library as a reference implementation, port it over to your platform of choice. Blynk protocol is tiny and doesn’t depend much on the platform APIs.

I also updated my original reply with more details.

[mahmoud.metwally]

@vshymanskyy

TCP/SSL

Okay great, but how i can use Arduino framework on Blue Pill i can’t find any references for that.

[mahmoud.metwally]

And if there is any Documentation for the Blynk Protocol and how it technically works

[PeteKnight]

It’s already been done for you by @khoih.
As I said earlier, all you need to do is search.

Pete.

[mahmoud.metwally]

I haven’t find anything related to the Implementation of Blynk on STM32. All i have found is irrelevant to the application.

[PeteKnight]

@vshymanskyy

Direct MQTT connections are not supported by Blynk atm. We consider Blynk protocol superior to MQTT:

But, according to @Pavel ”MQTT is scheduled for SEP 2021”
Hopefully, that will be an MQTT 3.11 implementation.

Pete.