ESP8266 Community Forum

in general: if you define it before the include,
in the.h should prevent it being redefined.
If it doesn't work in arduino, it is a "feature" of the ide (reordering includes or else)

JohnDoe23232 wrote:...You would have to first un-define it:

Code: Select all#undef  MQTT_MAX_PACKET_SIZE // un-define max packet size
#define MQTT_MAX_PACKET_SIZE 500  // fix for MQTT client dropping messages over 128B

Cheers mate. Didn't know you could fix this like that.