hieuns asked 5 years ago Hello everyone, I am using esp8266 for my IoT project with MQTT protocol. Default MQTT parameters are defined in the code and I used c# tool to configure MQTT parameters and save them into flash memory of esp8266. However, sometime the flash memory is reset to OxFF and then the esp8266 use the default value of MQTT parameters, sometime it overwrite into the current data. Can you explain this case for me ?