OTA over MQTT

[timurufa86]

is it possible to implement this with this library? if not, how can you do it?

[timurufa86]

forums suggested

but I can’t understand how it will work

static void onMqttMessage(char topic, char payload, AsyncMqttClientMessageProperties properties, size_t len, size_t index, size_t total) {

// update requested? if (strcmp(topic, MQTT_CLIENT "/update") == 0) { int _lastError = 0; // start update if (index == 0) { Update.runAsync(true); if (!Update.begin(total, U_FLASH)) { _lastError = Update.getError(); Update.printError(Serial); // ignore the rest topic[0] = 0; } } // do update in chunks if (!_lastError) { if (Update.write((uint8_t *)payload, len) != len) { _lastError = Update.getError(); Update.printError(Serial); // ignore the rest topic[0] = 0; } } // finish update if (!_lastError) { if (index + len == total) { if (!Update.end()) { _lastError = Update.getError(); Update.printError(Serial); } else { // restart? ESP.restart(); } } } }

// ... }

[luebbe]

Take a look a t the homie framework: https://github.com/homieiot/homie-esp8266 It implements OTA over MQTT