Tag: Semaphores

Let’s push it !

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2020-02-08

12:00

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So far, the ESP32 was able to receive images from the server through MQTT and transmit them to the STM32. It also could transmit animations but only if the animation was directly hardcoded. So what we wanted to do was to be able to transmit animations through MQTT just like images and also to find a way to chose if we want to receive an animation or an image.

First things first : the server side

The first step we did to go in this direction was to find a way to transmit animations.
We chose that, at least for now, the server will publish periodically on two topics.… Read more

The clearer, the better.

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2020-02-05

21:40

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For the last two days, I mostly spent time making the code clearer. Some big functions got divided to make them easier to read and to modify once we will get the test PCB.

The second thing was to add semaphores to protect the variable shared between our threads on both the ESP and the STM. I also create a new thread that will be used to display the image or the animation we receive from the ESP. So far it only prints on the console the value of each bytes but having it already created allowed me to add the semaphores on the image so that when we will be trying to display images with the coils we will simply have to deal with the coils.… Read more