Need help flashing ESP-07

[M*I*B]

Hello there,

today three 07 are found in my mailbox... fine But... How to flash it?

I habe try to connect (from 07 <-> RS232) RX-TX, TX-RX, GND-GND, VCC-3,3V and RST to GND

But they don't like to talk with me. I also can't see any on terminal with and without RST to GND (putty, COM1,115200,8,n,1) where I use day by day to talk with my D1-mini or NodeMCU (that works well).

What I'm doing wrong?!?

[Shardan]

If you use ESP-07 - no chance.
The ESP-07 is a quite old type, it has 512KB flash.
The bin-file of ESPEasy is bigger then that.

The ESP-07S is a newer type with 4MB flash.

Regards
Shardan

[M*I*B]

Hi Shardan,

I've probably fallen for this time ... I bought extra at a German dealer in the hope to receive no junk. My misjudgment ...

How can I distinguish exactly the two versions purely optically? Due to lack of space, I need the 07, but I do not want to buy junk again...

[Shardan]

Here is a photo that shows ESP-07 and ESP-07s:

https://ae01.alicdn.com/kf/HTB17kh3NpXX ... tional.jpg

Remember the ESP-07S has no onboard antenna and needs an external antenna always.


Regards
Shardan

[M*I*B]

... thx a lot ... Meanwhile I have also search for information about 07-derivates... Looks like that the 07 1st came with 512k, a short time with 1M and 4M (in Asia only)...
But is ok. The german dealer where I get this type from have notice that and offer a change... Take a Week or so ...

So the next days it will be fine if somewone can tell me how I can flash the 07S. If the way I descibed initial the right way? Or have I try it wrong?

[Shardan]

The ESP-07S is a bare ESP-chip, so you need some external parts to get it to work at all.
Some GPIO's need specific settings for running firmware and flash mode.

Roughly:
GPIO0 --> 3.3V run firmware
GPIO0 --> 0V flash mode after next reset/restart
GPIO15 --> 0V run firmware
GPIO2 --> 3.3V run firmware.
CH_PD --> 3.3V must be 3.3V for running the chip ("Enable").

On top put a 100nF ceramic capacitor from the Vcc pin to the gnd pin of the ESP as enar as possible.
For my circuits I put all needed pins together on a pinheader. maybe have a look at
https://www.letscontrolit.com/wiki/inde ... /IR-Remote
There is a schematic (pdf availlable beneath the shown schematics) that shows
the complete ESP circuit.

That page also describes the flashing.

Regards
Shardan

[M*I*B]

thx a lot. GPIO0 was the devil in my doing I will report if the 07S arrived ...

I belive I build a connector like a clamp to flash. Looks like the easyest way to flash more than one.
So bad that the 07S don't have a Patchantenna, but I have the idea to solder one on a antennaplug and the other side to the housing. I will see. I don't must use an internal antenna on any projekt, but for some it's maybe a good replacement...

[Shardan]

You can use a standard IPEX cable with antenna.
Or maybe use a "PCB antenna", a small PCB just with the antenna and IPEX cable.
These PCB antennas can just be glued into the case with double sided adhesive tape,
some sellers have that tape applied ready for use.

Both types are availlable at usual sources, Ali etc.

[M*I*B]

BTW:
While looking around about info of the 07S I also find some German dealer offer the 07S. But all the same: No info about the size of the flash.
I have pic one dealer, "Eckstein Komponente" and ask for it. Answer comes up just some minutes before...

Guten Tag,

Es ist 1Mbyte groß.

Mit freundlichen Grüßen,
Eckstein Komponente

( ... the Flash is 1Mb in size ...)

Can that be true? If so then there are two different versions on market, one with 1Mb and one with 4Mb, that are not explicit marked as it ...

EDIT say...

May take a look at http://www.esp8266.com/wiki/doku.php?id ... ule-family at bottom end. There is a table showing also that the ESP-07 have 1Mbyte with hint "May be different on different editions of the board" and the 07S is only available with 4Mbyte...

I believe if I'm spend more time to looking around I will find some more contradictory informations about it ^^

[Shardan]

Heyas,

basically it can be true. The ESP-07S is a custom chip, it is manufactured by third party, not by Espressif (Manufacturer of the ESP8266).
So what this third party manufacturer solders on the PCB under the cap is a good question - they can put a lot of different flash chips there.
That's why the datasheed does not say a word about flash size: http://www.watterott.com/media/files_pu ... SP-07S.pdf

The ESP-07S i have running are flashed with 4096-binary, no issues.
The more, shops like electrodragon mark the ESP-07S as "4MB" (or 32MBit, it's same):
http://www.electrodragon.com/product/es ... fi-module/
http://androegg.de/?product=ai-thinker- ... wifi-modul

I suggest to get a breadboard adapter and test one chip.

Regards
Shardan

[M*I*B]

...I will waiting for one and if arrived I 1st biuld a clamp- connector... Then I'm ready to work with