- Sat Jul 09, 2016 2:55 am
#50436
Hi to everyone, I'm completely new here, and a little confused 
I have 2 boards, the ESP-12 and the other one with only two GPIOs.
I could send and recieve AT commands to both boards using an Arduino Uno and the serial monitor, but after trying to flash something to them, now I can't send or recieve AT commands.
I dont have a Usb to TTL board, so I used the Arduino just like this picture (attached), voltage divider to shift 5V to 3,3V. I also have a reset button and a button to put GPIO0 to ground. I keep GPIO0 LOW while I press RESET to enter flash mode, and the board's led blinks only one time.
I've tried ESPFlash Downloader, but It says connecting.... Failed to connect. Only in one ocassion I could connect and get to 100%
I've also tried Nodemcu flasher, changed the baudrate to 115200 (the baud I set on the ESP), loaded bin files, put the ESP in Flashmode before opening the program, but it always always says Waiting MAC. But I clicked FLASH anyway, and now I can't even comunicate via AT commands
I dn't know what to do... I have the same problem on the two boards. I'm trying to flash Nodemcu or the AT firmware.. something..!
Thanks to everyone
I have 2 boards, the ESP-12 and the other one with only two GPIOs.
I could send and recieve AT commands to both boards using an Arduino Uno and the serial monitor, but after trying to flash something to them, now I can't send or recieve AT commands.
I dont have a Usb to TTL board, so I used the Arduino just like this picture (attached), voltage divider to shift 5V to 3,3V. I also have a reset button and a button to put GPIO0 to ground. I keep GPIO0 LOW while I press RESET to enter flash mode, and the board's led blinks only one time.
I've tried ESPFlash Downloader, but It says connecting.... Failed to connect. Only in one ocassion I could connect and get to 100%
I've also tried Nodemcu flasher, changed the baudrate to 115200 (the baud I set on the ESP), loaded bin files, put the ESP in Flashmode before opening the program, but it always always says Waiting MAC. But I clicked FLASH anyway, and now I can't even comunicate via AT commands
I dn't know what to do... I have the same problem on the two boards. I'm trying to flash Nodemcu or the AT firmware.. something..!
Thanks to everyone
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Last edited by LucianoPez on Sat Jul 09, 2016 1:25 pm, edited 1 time in total.
