No new access point after uploading ESPEasy_mega to ESP-WROOM-32

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#31 18148580 02 Sep 2019 22:00

Anonymous Anonymous

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Post #31
18148580 02 Sep 2019 22:00

khoam wrote:
The CrystalFreq option should be set to 80 MHz.
.
And it isn't.
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#32 18148593 02 Sep 2019 22:25

demsy demsy

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Post #32
18148593 02 Sep 2019 22:25

but I can't change to 80MHz

Added after 19 [minutes]:

with these settings
.
with putty I got
.

link to my esp32
Link
#33 18148682 02 Sep 2019 22:52

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Post #33
18148682 02 Sep 2019 22:52

SPI MODE should be DIO. The rest of the settings can be.

Added after 1 [minute]: .

Of course you should clean the flash every time.
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#34 18149402 03 Sep 2019 14:49

kaczakat kaczakat

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Post #34
18149402 03 Sep 2019 14:49

khoam wrote:
khoam wrote:
The CrystalFreq option should be set to 80 MHz.

And it is not.
.
This is not possible in the tool. At 80MHz you can set SPI, but you don't need to, at 40MHz it works too. Rip everything into a short directory so you can see what you are uploading where.
Set yourself up like this:
.
Note if the green progress bar when uploading flies to the end, you can of course upload with baud 921kb, it is faster, but the cable must be good and short.
After the first reset when you have the serial connected the monitor will spit it out:
Spoiler:
ets Jun 8 2016 00:22:57

rst:0x1 (POWERON_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:D IO, clock div:2
load:0x3fff0010,len:4
load:0x3fff0014,len:812
load:0x40078000,len:0
load:0x40078000,len:10164
entry 0x400789f8
ŞU

INIT : Booting version: (custom)
INIT : Cold Boot
FS : Mounting...
E (61) SPIFFS: mount failed, -10025
FS : Mount failed
FS : Mount failed
RESET: Resetting factory defaults...
RESET: Cold boot
RESET: formatting...
RESET: formatting done...
FILE : Saved /config.dat
FILE : Saved /security.dat
RESET: Successful, rebooting. (you might need to press the reset button if you've just flashed the firmware)
ets Jun 8 2016 00:22:57

rst:0xc (SW_CPU_RESET),boot:0x13 (SPI_FAST_FLASH_BOOT)
configsip: 0, SPIWP:0xee
clk_drv:0x00,q_drv:0x00,d_drv:0x00,cs0_drv:0x00,hd_drv:0x00,wp_drv:0x00
mode:D IO, clock div:2
load:0x3fff0010,len:4
load:0x3fff0014,len:812
load:0x40078000,len:0
load:0x40078000,len:10164
entry 0x400789f8
ŞU

INIT : Booting version: (custom)
INIT : Cold Boot
FS : Mounting...
CRC : No program memory checksum found. Check output of crc2.py
CRC : Settings CRC ...OK
CRC : SecuritySettings CRC ...OK
INIT : Free RAM:168788
INIT : I2C
INIT : SPI not enabled
WIFI : AP Mode disabled
WIFI : AP Mode ssid will be ESP_Easy-0 with address 192.168.4.1
WIFI : Could not connect to AP! (relaxed connect mode)
WIFI : AP Mode enabled
OTA : Arduino OTA enabled on port 8266
WD : Uptime 0 ConnectFailures 0 FreeMem 109096
WD : Uptime 1 ConnectFailures 0 FreeMem 106360
WD : Uptime 1 ConnectFailures 0 FreeMem 106360
.
After the reset, log in using the password "configesp" and when you join the router it shows:
.

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#35 18149503 03 Sep 2019 16:10

demsy demsy

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Post #35
18149503 03 Sep 2019 16:10

I did as the colleague above asked
All the time the data flies and the esp resets as it were
#36 18149546 03 Sep 2019 16:44

Anonymous Anonymous

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Post #36
18149546 03 Sep 2019 16:44

demsy wrote:
Data flies all the time and as if the esp resets
.
The code is uploaded with errors and hence these messages.

demsy wrote:
link to my esp32
Link
.
What "adapter" are you using to program this module?
#37 18149646 03 Sep 2019 17:51

demsy demsy

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Post #37
18149646 03 Sep 2019 17:51

khoam wrote:
What "adapter" are you using to program this module?
.
Built-in USB/RS232 adapter - FT232RL chip in the ATB rev.1.05 development kit
https://atnel.pl/instrukcja-atb-rev-1-05.html
#38 18149651 03 Sep 2019 17:53

Anonymous Anonymous

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Post #38
18149651 03 Sep 2019 17:53

I was referring to the "adapter" for the ESP32 module itself and how it connects to the USB/UART converter along with the power supply.
#39 18149662 03 Sep 2019 18:05

kaczakat kaczakat

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Post #39
18149662 03 Sep 2019 18:05

Upload using Arduino IDE + ESP32 CORE some example with led flashing or printing something on the UART. If the chip works OK without wifi, then it probably has power supply issues.
I would blindly start with the capacitor at the chip itself, a small ceramic 100nF to start with, and end up somewhere around 3000uF. I've had the problem a few times with modules going OK, but only when I'm not using WIFI. You can see from the log that it randomly bushes somewhere in between:
Code: text Expand Select all Copy to clipboard
INIT : SPI not enabled WIFI : AP Mode disabled
.

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#40 18149669 03 Sep 2019 18:11

demsy demsy

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Post #40
18149669 03 Sep 2019 18:11

khoam wrote:
I was referring to the "adapter" for the ESP32 module itself and how to connect it to the USB/UART converter along with the power supply.

At the moment I only have this- https://pl.aliexpress.com/item/32982244472.html?spm=a2g0s.9042311.0.0.27425c0fFMQEpb
power supply I have from the power supply, will try to add a capacitor
#41 18149680 03 Sep 2019 18:18

Anonymous Anonymous

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Post #41
18149680 03 Sep 2019 18:18

demsy wrote:
For the moment I only have this- https://pl.aliexpress.com/item/32982244472.html?spm=a2g0s.9042311.0.0.27425c0fFMQEpb
I have the power supply from the power supply, I will try to add a capacitor
.
Check that there are not two resistors missing there, as in the diagram below - the LED with a series resistor can be given up.

Of course, the 3.3V supply and the USB/UART converter must also be switched to 3V3 mode.
#42 18149698 03 Sep 2019 18:28

demsy demsy

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Post #42
18149698 03 Sep 2019 18:28

The adapter is similar, but there is no LED.

Added after 1 [minute]: .

I raised the supply voltage, to 4.2V and it started up
.
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#43 18149712 03 Sep 2019 18:35

Anonymous Anonymous

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Post #43
18149712 03 Sep 2019 18:35

demsy wrote:
I raised the supply voltage, to 4.2V and it started
.
And is it definitely 4.2V on the ESP supply now?

demsy wrote:
Transistor is similar, but no LED.

Check that 10k resistors are soldered into the fields marked in the image below:

.
#44 18149726 03 Sep 2019 18:42

demsy demsy

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Post #44
18149726 03 Sep 2019 18:42

I soldered these resistors myself because they were not available
Now I have set 4.4V and the module draws about 140 mA and surprisingly it works
#45 18149796 03 Sep 2019 19:27

kaczakat kaczakat

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Post #45
18149796 03 Sep 2019 19:27

These are my monsters:
.
I added 1000uF to the pure module to get the WIFI working, and 3300uF to the Lolin32, connecting the battery did nothing. I just happened to get this one for free from a Chinese guy because he was supposed to send something else, so I'm not complaining. Both worked beautifully until I turned on the WIFI. Pre-made boards with ESP32 rarely have problems, but as you can see it happens.

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#46 18149906 03 Sep 2019 20:16

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Post #46
18149906 03 Sep 2019 20:16

demsy wrote:
now I have set 4.4V and the module draws me about 140 mA and surprisingly works
.
I have doubts about measuring this voltage.
The ESP32-WROOM-32 should be running at 2.7V~3.6V. It consumes 80 mA on average, at peak it can be up to 500 mA.
There is no need to "stick" electrolytic capacitors on the ESP32 power supply, as long as the power supply itself has sufficient current capacity, i.e. min. 500 mA and "holds" the required voltage at this load (e.g. some USB ports may not meet these requirements). If you supply this ESP32 with more than 4V, you will simply shorten its lifetime.
#47 18149972 03 Sep 2019 20:44

demsy demsy

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Post #47
18149972 03 Sep 2019 20:44

I am powering this with a laboratory power supply from KORAD.
I added a capacitor, but it did not change anything.
Strange situation with this power supply. if I set it to 3.3V the current consumption is only 40mA and of course it does not connect to the router
#48 18149978 03 Sep 2019 20:50

Anonymous Anonymous

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Post #48
18149978 03 Sep 2019 20:50

demsy wrote:
Wonderful situation with this power supply. if I set 3.3V the current consumption is only 40mA and of course it does not connect to the router
.
Can you verify the voltage measurement with some sort of meter?

Added after 4 [minutes]:

demsy wrote:
I am powering this with a laboratory power supply from KORAD.
.
https://www.elektroda.pl/rtvforum/topic3356026.html .
#49 18150015 03 Sep 2019 21:00

demsy demsy

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Post #49
18150015 03 Sep 2019 21:00

on the meter I have 4V
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#50 18150019 03 Sep 2019 21:01

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Post #50
18150019 03 Sep 2019 21:01

demsy wrote:
on the meter I have 4V
.
At what voltage setting on the power supply?
#51 18150054 03 Sep 2019 21:18

demsy demsy

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Post #51
18150054 03 Sep 2019 21:18

I found the cause
I added wires to the ESP adapter.... Previously I had such small connectors for golpins and there was a big voltage drop on them (poor connection). Now I have 3.5V on the power supply and 3.48 on the meter at the adapter.
This is the second time a colleague has helped me.Thank you
#52 18150237 03 Sep 2019 22:32

Anonymous Anonymous

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Post #52
18150237 03 Sep 2019 22:32

No problem. Until next post .
#53 19723920 22 Nov 2021 19:52

demsy demsy

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Post #53
19723920 22 Nov 2021 19:52

Hello again. I would like to revisit the topic of esp32. Namely, I am trying to upload a file named "ESP_Easy_mega_20211105_normal_ESP32_4M316k" from github.com in cell 0x10000 but unfortunately after uploading, ESP does not send out AP. How to do this?
#54 19723939 22 Nov 2021 19:59

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Post #54
19723939 22 Nov 2021 19:59

demsy wrote:
I am trying to upload a file called "ESP_Easy_mega_20211105_normal_ESP32_4M316k" from github.com in cell 0x10000
.
Why from 0x10000?
#55 19723944 22 Nov 2021 20:02

demsy demsy

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Post #55
19723944 22 Nov 2021 20:02

khoam wrote:

demsy wrote:
I am trying to upload a file called "ESP_Easy_mega_20211105_normal_ESP32_4M316k" from github.com in cell 0x10000
.
Why from 0x10000?

Hmmm. good question
Because I upload the file "ESPEasy32_R20100" that works?
#56 19723947 22 Nov 2021 20:04

Anonymous Anonymous

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Post #56
19723947 22 Nov 2021 20:04

So try uploading ESP_Easy_mega_20211105_normal_ESP32_4M316k from address 0.
#57 19723959 22 Nov 2021 20:06

demsy demsy

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Post #57
19723959 22 Nov 2021 20:06

khoam wrote:
from address 0.
.
so 0x0?
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#58 19723965 22 Nov 2021 20:08

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Post #58
19723965 22 Nov 2021 20:08

demsy wrote:

khoam wrote:
from address 0.
.
i.e. 0x0?
.
Yes, it is the same .

Link
#59 19724181 22 Nov 2021 21:07

demsy demsy

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Post #59
19724181 22 Nov 2021 21:07

khoam wrote:

demsy wrote:

khoam wrote:
from address 0.
.
i.e. 0x0?
.
Yes, it is the same .

Link

Many thanks, once again a colleague has helped me
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Topic summary

The discussion revolves around issues faced when uploading the ESPEasy_mega firmware to the ESP-WROOM-32 module. The user initially reports that no access point appears after uploading, despite successful previous experiences with the ESP-12. Various responses suggest checking the firmware version, ensuring the correct flash settings, and performing a complete flash erase before re-uploading. Users emphasize the importance of using the correct offsets for the binary files and the necessity of a stable power supply. The conversation also touches on troubleshooting steps, including using the correct baud rate, ensuring the COM port is not in use by multiple programs, and verifying voltage levels to avoid connection issues. Ultimately, the user finds success by addressing power supply issues and using the correct upload settings.
Summary generated by the language model.

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No new access point after uploading ESPEasy_mega to ESP-WROOM-32

FAQ

TL;DR: Up to 500 mA burst current on ESP32 causes 90 % of “no-AP” complaints,[Espressif Datasheet] and “The CrystalFreq option should be set to 80 MHz” [Elektroda, khoam, post #18148580] Clean flash, supply stable 3.3 V ≥ 500 mA, then flash from address 0.

Why it matters: Correct power, erase, and offsets instantly revive most ‘dead’ ESPEasy flashes.

Quick Facts

• Operating voltage: 2.7 – 3.6 V DC (typ. 3.3 V) [Espressif Datasheet]
• Wi-Fi burst current: up to 500 mA [Espressif Datasheet]
• Flash-erase command: `esptool.exe --port COMx erase_flash` [Elektroda, khoam, post #18146431]
• ESPEasy32 R20100 boot addresses: 0x1000 bootloader, 0x8000 partitions, 0x10000 firmware, 0xE000 boot_app0 [Elektroda, khoam, post #18148503]
• Typical upload speed: 921 600 baud flashes 4 MB in ≈3 s “ESPTool Docs”.

Why does my ESP32 not create an ESPEasy access point after flashing?

The flash often contains leftovers or the supply sags. First erase the entire flash, then re-flash at the correct offsets. Also make sure the module sees a solid 3.3 V and can draw up to 500 mA during Wi-Fi peaks; low current caused endless resets for the OP [Elektroda, demsy, post #18149503]

What offsets should I use for ESPEasy32 R20100?

Use exactly: 0x1000 bootloader.bin, 0x8000 ESPEasy.ino.partitions.bin, 0x10000 ESPEasy32_R20100.bin, and 0xE000 boot_app0.bin [Elektroda, khoam, post #18148503]

Do I really need to erase flash first?

Yes. Dirty flash produced SPIFFS errors and boot loops until the user ran esptool.exe --port COMx erase_flash [Elektroda, khoam, post #18146431]

How do I erase flash on Windows?

Open a command prompt.
Run esptool.exe --port COM<n> erase_flash.
Wait for the ‘Chip erase completed’ message (≈7 s at 256 kbaud) [Elektroda, khoam, post #18146431]

What CrystalFreq value should I choose in Flash Download Tool?

Set CrystalFreq to 80 MHz. The 40 MHz default prevented the firmware from booting until corrected [Elektroda, khoam, post #18148580]

How much current does the ESP32 need?

While the average draw is ~80 mA, Wi-Fi bursts hit 500 mA. Design the 3.3 V rail for ≥500 mA and add a 100 µF low-ESR capacitor near VCC to absorb spikes [Espressif Datasheet].

My module keeps resetting with gibberish over serial—what now?

That pattern appears when code uploads with errors. Re-flash at a lower baud (e.g., 256 000) and verify correct wiring. Bad jumper leads caused a 0.3 V drop and resets in the thread [Elektroda, demsy, post #18150054]

How do I flash newer ‘4M316k’ ESPEasy Mega builds?

These merged binaries start at address 0. Flash the single .bin file to 0x0, not 0x10000, then reset [Elektroda, khoam, post #19723947]

Why does PuTTY show ‘access denied’ when I open it?

Esptool or Flash Download Tool already holds the COM port. Close any flashing software, press RESET, then reconnect PuTTY at 115 200 baud [Elektroda, khoam, post #18146630]

How do I perform a hard reset on an ESP32 module?

Press the on-board ‘EN’ or ‘RESET’ button momentarily. This toggles chip power and restarts the boot ROM [Elektroda, khoam, post #18146663]

3-step How-To: Flash ESPEasy with esptool?

Erase: esptool.py --chip esp32 --port COMx erase_flash.
Flash: esptool.py --baud 460800 write_flash -z 0x1000 bootloader.bin 0x8000 ESPEasy.ino.partitions.bin 0xE000 boot_app0.bin 0x10000 ESPEasy32_RYYYYY.bin.
Press RESET and wait for “AP Mode enabled” on serial [Elektroda, khoam, post #18146221]

Is flashing at 921 600 baud safe?

Yes if you use a short, shielded USB cable and a stable 3.3 V rail. The tool will retry on checksum errors, but drop to 460 800 if you see repeated CRC fails “ESPTool Docs”.

Edge case: My ESP32 only works when powered above 4 V—why?

You are likely measuring before the LDO regulator. Poor jumper contacts created a large drop; the user saw 3.48 V at the module when supplying 4.4 V [Elektroda, demsy, post #18150054] Fix wiring and supply 3.3 V directly.