ESP8266 Community Forum

- Tue Nov 11, 2014 6:46 pm #2493 I've received my ESP-03 module this morning, but I wasn't able to make it work. No response from the UART, whatever the baudrate ...

@mcsa, can you confirm the normal mode pinout since your post confused me since it describes same wiring in flash or normal mode ?

5. using esptool.py flash firmware
a. CH_PD to VCC
b. GPIO02 to VCC
c. GPIO00 to GND
d. GPIO15 to GND
6. to normal start CH_PD to VCC and GPIO15 to GND

If it is not pinout issue, I guess my module is defective, so, I will have to order another one and wait 3-4 weeks
At least, in the mean time, I can still play with my ESP-01 ...

- Wed Nov 12, 2014 12:43 am #2497 The ESP-03 doesn't come with AT firmware, it won't respond on serial. Just upload the latest 9.2.2 firmware and it will start speaking back.

- Wed Nov 12, 2014 11:43 am #2508 I've tried uploading firmware with esptool.py, but I always get "Failed to connect". I' ve also tried with CH_PD to GND like I did succesfully with my older ESP-01, but my ESP-03 never get connected

- Thu Nov 13, 2014 1:56 am #2529 for programming connect:

CH_PD to VCC
GPIO00 to GND
GPIO15 to GND

for normal operation connect:

CH_PD to VCC
GPIO15 to GND

however I still dunno why do I get

Code: Select allMicrosoft Windows XP [Wersja 5.1.2600]
(C) Copyright 1985-2001 Microsoft Corp.
C:\esp_iot_sdk_v0.9.1\examples\at>make
CC driver/uart.c
make: execvp: c:/esp_iot_sdk_v0.9.1/xtensa-lx106-elf/bin/xtensa-lx106-elf-gcc: Bad file number
make: *** [build/driver/uart.o] Error 127

upon make.... any idea for what this "Bad file number" error means and hopefully how to fix it?
Thanks!