Question on serial debugging

[caleyfeli85]

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]

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

[ashelybrown]

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]

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?