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const char in write functions for udp, i2c, ethernet
Topic last updated 05 Feb 2026, by 
robert engle.
1 reply
robert engle.
1 reply
in a number of the write or send functions in the library such as i2c and udp, the data to be transmitted is declared as a const char such as
write
int write( int address, const char * data, int length, bool repeated = false )
Write to an I2C slave
Does not the const char array have to be declared as an initialized value, which is stored in rom verses the plain char array which allows the data to be determined at any time, stored in ram.