ESP8266 Community Forum

Hi everyone,

I'm trying to get the DHCP server (dhcpserver.c) to print DHCP debug information to the console. I can see that there are many calls (45 to be exact) calls to os_printf, however, none of them print anything to the console.

Strangely, in my app initialization code, if I call:

Then I see the 'hello world' message.

So basically os_printf() works at a high level, but not from within dhcpserver.c. Can somebody help?

Thankyou!

Where are you calling your DHCP server code?

Make sure you set up the UART ports as one of the first things you do - os_printf relies on them being initialised. I do it as the first line in my startup code

Hi davydnorris, thanks for the reply.

It's part of MongooseOS, and I'm doing a local build. It appears that the toolchain I'm using insists on pulling certain parts of the Espressif SDK from the cloud instead of my version (which contains os_printf() calls).

I guess it's better that I ask the Mongoose OS forums than here, since it appears now to be a toolchain/build issue for Mongoose.

Andy, if I may. What are you seeing technically on your side that would indicate that? Is it part of your makefile?