ESP32 Forum

Hi guys,
I got a Nano32 board from rudi;) and try to use it with Arduino IDE 1.6.12; Win10
Followed the instructions http://microcontrollerkits.blogspot.de/ ... o-ide.html
Fixed the first problem "no module named serial" http://www.ayarafun.com/2016/10/arduino ... rst-touch/
but can't get the blink example to upload.

Settings:
ESP32 Dev Module
Flash 40MHz
upload speed 115200
Programmer AVR ISP

Code:
#define LED 16
void setup() {
pinMode(LED, OUTPUT);
}
void loop() {
digitalWrite(LED, HIGH);
delay(1000);
digitalWrite(LED, LOW);
delay(1000);
}

Error Message:
esptool.py v2.0-dev
Connecting...
Uploading stub...
Running stub...
Stub running...
Attaching SPI flash...
Configuring flash size...
Erasing flash...
Unc size 4016 comp size 2616 comp blocks 3

A fatal error occurred: Timed out waiting for packet content

Module has green and yellow LED on steady
I tried already to use Nano32 board, and different speeds but no difference.

When I use the serial monitor with 115200 baud there is a lot of 'traffic' with constant reboot.
Green LED on, Yellow off, red blinking

What am I doing wrong? Please help

It seems that the board is not getting reset into download mode by esptool. Can you try holding GPIO0 low while programming the board?

Tried to short press GPIO0, also long press, also keep pressed, also keep pressed and press EN, all versions.

Only the first time when connected I get

esptool.py v2.0-dev
Connecting...
Uploading stub...
Running stub...
Stub running...
Attaching SPI flash...
Configuring flash size...
Erasing flash...
Unc size 4016 comp size 2616 comp blocks 3

Writing at 0x00001000... (100 %)
Wrote 2616 bytes at 0x00001000 in 0.2 seconds (87.6 kbit/s)...
File md5: b2398575be7005ef224d9b7fdbd60262
Flash md5: c740ab70eadacc35003e7f9c616d01cc

A fatal error occurred: MD5 of file does not match data in flash!

Output from the module:
rst:0x10 (RTCWDT_RTC_RESET),boot:0x3f (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0x00
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:QIO, clock div:2
ets Jun 8 2016 00:22:57

Until I disconnect the module I get then the message "Timed out waiting for packet content"

GyroGearloose wrote:A fatal error occurred: MD5 of file does not match data in flash!

I believe this was due to flash status register bug and was fixed recently. Do you have latest updates to esp-idf and submodules?

http://esp32.com/viewtopic.php?f=2&t=322