Help, function calls to some library functions made in callbacks are sometimes getting lost.

This page summarizes the projects mentioned and recommended in the original post on /r/arduino
Mqtt Asynchronous Arduino Client Esp8266

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  • esp-dht-mqtt-async

    • My code is here.

  • async-mqtt-client

    📶 An Arduino for ESP8266 asynchronous MQTT client implementation

    • https://github.com/marvinroger/async-mqtt-client/blob/master/src/AsyncMqttClient.hpp onMqttPublish() is a callback of type OnPublishUserCallback.

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  • ESPAsyncTCP

    Async TCP Library for ESP8266

    • The callbacks are called from the functions _onPubAck and _onPubComp. These in turn are called from _onData which is assigned to _client.onData. From here, we can see that this is AsyncClient _client which is defined in ESPAsyncTCP.h which looks to be a core ESP library owned by espressif. Without more digging, I don't see anything that tells me about the context the callback are called within.

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