Ifndef Not Working For RX2/TX2 Redefinition · Issue #4583 - GitHub

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Additional navigation options ifndef not working for RX2/TX2 redefinition #4583New issueNew issueClosedClosedifndef not working for RX2/TX2 redefinition#4583LabelsStatus: StaleIssue is stale stage (outdated/stuck)@jshep321

Description

@jshep321jshep321opened on Nov 26, 2020

I am trying to redefine the pins for my serial port using Serial2 -- RX2/TX2. If I comment out the #define in HardwareSerial.cpp, everything works as expected with my new pins. This works:

#ifndef RX2 #define RX2 16 //default //#define RX2 14 //esp32cam available pin #endif #ifndef TX2 #define TX2 17 //default //#define TX2 15 //esp32cam available pin

However, if I #define them in my application, the defaults are used and the #ifndef are ignored. Any suggestions on how to make these visible without editing the (common file) HardwareSerial.cpp?

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Status: StaleIssue is stale stage (outdated/stuck)

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Tag » Arduino Ifndef Not Working