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ESP8266 MQTT client dynamically changing MQTT broker settings

Japio Hardware Contributor last edited by

Hi,

I am working on an ESP8266 MQTT gateway with a web interface to allow th user to configure settings. One of these settings is the MQTT broker IP address and port number.

In the before() I read out the IP address from EEPROM and want to set it in the gateway software, and not as normally done by defining MY_CONTROLLER_IP_ADDRESS.

Is it possible to do this?

I already tried to declare _ethernetControllerIP as external. This doesn't work.
Also tried to skip de definition MY_CONTROLLER_IP_ADDRESS and declar it in the gateway sketch. Didn't work either.
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@eiten said in Saving last known good state, but not in EEPROM: utility meter in home assistant This is exactly what I am seeking! Thank you! PS I truly enjoy reverse translating! It teaches me how to better understand my first language and it gives me alternate words to use in searches. So a second thank you! "Regelmässiges Zurücksetzen" would be best translated to English in this context as "Periodic Reset". In the English version of Home Assistant it is called "Meter reset cycle" (I remember seeing "keep dry" translated as "do not take in shower with you"
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IT WORKS I got a first working version, using an ATmega1284P running on MightyCore 2.2.2 (as soon as I began developement, they switched from Optiboot to Urboot in version 3.0.0, whicht does not include the copy_flash_pages function anymore, but I'm working on a work around there). Only thing I could not solve is to do a CRC check of the image after download... You can try it out here: https://github.com/eiten/MySensors/tree/FOTAInternalFlashTest It's not beautiful yet with much Serial.prints in it, but maybe it helps you if you find errors.
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@OldSurferDude well, the ESP8266 is limited to 4 TCP clients in arduino IDE. This can't be really increased. I did som experiments and you can set it up to 15, but after the 5th client on my web server, I got a freeze. Maybe you got something wrong. #define MY_GATEWAY_MAX_CLIENTS 2 defines how many controllers (eg Home Assistant) can connect to the gateway, not how many sensors/MySensors devices. And yes, you can have multiple TCP gateways in HomeAssistant. I got an NRF24, an RFM95 long range and a RFM95 short range gateway (all based on ESP32) on the same Home Assistant. Regards, Edi
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You should only include the relevant header file in the file Gestion_Porte.hpp, not Mysensors.h For example #include <core/MyTransport.h>

ESP8266 MQTT client dynamically changing MQTT broker settings

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