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I'm experimenting adding DHCP option 160 to dhcpserver.c in the Arduino core for ESP8266 and therefor need to rebuild the relevant parts.

I made an initial guess that I might be able to make the change by installing using git according to the instructions in the readme and just restarting the IDE. I wasn't surprised to learn that this didn't help. The modifications to dhcpserver.c did not make it to the device following restart of the IDE and a new upload.

From another forum I saw a suggestion that the following commands could be used to rebuild from source:

$ cd esp8266/tools/sdk/lwip/src
$ make install

Again the changes didn't make it to the device after restarting and uploading the sketch again.

Does anyone have any clearer instructions for how to build a new Arduino core for esp8266?

Chris Steinbach
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1 Answers1

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There are four variants of LwIP bundled with the ESP8266 core:

  • V1.4 (Compile from source)
  • V1.4 (Precompiled)
  • V2 Lower Memory
  • V2 Higher Bandwidth

By default (for most boards) one of the V2 variants is selected. You need to change that to the V1.4 (Compile from source) for it to use the version that you have modified.

Majenko
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