Question on serial debugging

caleyfeli85
Posts: 1
Joined: Thu Jan 21, 2021 10:19 pm

Question on serial debugging

Postby caleyfeli85 » Thu Jan 21, 2021 10:24 pm

Hi folks,

I'm new to esp8266 firmware programming. I'm trying to start off by writing simple programs.

I'm using ubuntu linux with the esp-open-sdk. I can compile and flash simple programs (like blink) but I'm really stumped with printing debugging info to the console via the os_printf() function.

I have a simple user_init() function which includes two function calls.

uart_init(115200,115200);

os_printf("hello world");

I am expecting to see "hello world" printed on /dev/ttyUSB0 when I use the command "cat /dev/ttyUSB0".

I've already used stty to setup the serial port. I have it setup as such: "stty -F /dev/ttyUSB0 raw" and "stty -F /dev/ttyUSB0 115200".

I have my esp8266 wired properly to a ftdi usb to serial converter. Any ideas on what is going on?

Her Mary
Posts: 537
Joined: Mon Oct 27, 2014 11:09 am

Re: Question on serial debugging

Postby Her Mary » Thu Apr 22, 2021 5:19 pm

Maybe you could have a try with the latest RTOS SDK https://github.com/espressif/ESP8266_RTOS_SDK .

ashelybrown
Posts: 1
Joined: Wed Dec 01, 2021 11:38 pm

Re: Question on serial debugging

Postby ashelybrown » Wed Dec 01, 2021 11:50 pm

My ESP8266 is connected to a router. I get a status - WL_CONNECTED. Now I switch off the router, status - WL_NO_SSID_AVAIL. I switch on the router, status - WL_CONNECTED.
So may I relay on ESP8266 mechanism for connection recovering or should I poll the WIFI connection status in my program any way?

Keonte45
Posts: 77
Joined: Mon Sep 05, 2022 2:19 pm

Re: Question on serial debugging

Postby Keonte45 » Mon Nov 21, 2022 2:33 am

caleyfeli85 wrote:Hi folks,

I'm new to esp8266 firmware programming. I'm trying to start off by writing simple programs.

I'm using ubuntu linux with the esp-open-sdk. I can compile and flash simple programs (like blink) but I'm really stumped with printing debugging info to the console via the os_printf() function.

I have a simple user_init() function which includes two function calls.

uart_init(115200,115200);

os_printf("hello world");

I am expecting to see "hello world" printed on /dev/ttyUSB0 when I use the command "cat /dev/ttyUSB0".

I've already used stty to setup the serial port. I have it setup as such: "stty -F /dev/ttyUSB0 raw" and "stty -F /dev/ttyUSB0 115200".

I have my esp8266 wired properly to a ftdi usb to serial converter. Any ideas on what is going on?

Hi, what ideas did you use to fix this?

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