ESP01: Difficulty uploading ESP8266_AT_Bin_V1.6.2_0 firmware via Flash Download Tools v3.8.5

Question

Welcome, This is my first 'approach' to these modules. I bought 3pc. + adapters for programming on CP2104, FTDI 232RL, CH340. Diagram according to which I made the connections: . I have also added a reset button. External power supply, power supply ground, esp01 and adapters connected. I start...

khoam · Accepted Answer

. Ordinary ESP-01's usually have 512kB of flash memory, but there are exceptions. If you posted a photo of the 'lid' of these modules, you could have a closer look.

simw · Accepted Answer

. Do you take care in the terminal to add the appropriate characters at the end of the line after typing the command? Depending on the terminal this can vary. In the Serial monitor with the arduino, Both NL and CR should be selected.

khoam · Answer

. From the picture, it appears that one BIN file was uploaded too few. It should be: . . At what serial port speed setting?

88xtc · Answer

I have already corrected the memory address map settings for the upload:

.
And the situation after uploading:

.
On the AT+GMR command at 74880kb it responds with screams:

while after a reset at this speed I have feedback about what I have uploaded.
At 115200kb after issuing the AT command it responds:

while a reset at this speed results in a dump of bushes instead of feedback.

khoam · Answer

. Try it at 9600 speed.

88xtc · Answer

. On 9600kb there is no response at all on the other ones these predefined also either bushes or silence. I wonder if the firmware is actually uploaded well, looking through the videos there is a percentage progress with me it is different. I have ordered another 4 pcs and will see if anything moves. For one I uploaded EspEasy+ds1820, configuration in the browser ok, temp read but again not sending on thingspeak.

khoam · Answer

Have you tried clearing all the flash before uploading the firmware?

88xtc · Answer

. No, I don't know how to do that ?

khoam · Answer

ERASE option in the Download Tool.

88xtc · Answer

I just cleaned + uploaded this firmware from AT, still the same as before. Is it possible to deduce from these circuit feedback messages that it is faulty ?

khoam · Answer

. If you upload any program e.g. a sample program from the Arduino IDE, does the chip work correctly ?

88xtc · Answer

I uploaded via ArduinoIDE the simplest sketch to flash the blue LED on esp01, it uploaded correctly but there is no correct operation, only the red power supply is lit. I uploaded via GPIO0 shorted to ground on the CH340 adapter and the settings for the Generic ESP8266 module default because I don't know what to change there.

khoam · Answer

After uploading the AT firmware and resetting the chip, does the default WiFi network named ESP_xxxxx appear? ESP works in AP mode by default.

88xtc · Answer

Yes after uploading ESP8266_AT_Bin_V1.6.2_0 there is an ESP_CAF666 network open. Each esp01 after uploading reports me a WiFi network

khoam · Answer

So it looks like the firmware is correctly uploaded and there is a problem with access over the serial terminal. What terminal are you using and what are the session settings?

88xtc · Answer

The terminal built into the Arduino that is this serial port monitor and Putty. W
Putty I open a session, serial - select the port on which CH340 is visible, set the speed and that's it.

.

One more thing, I don't know if it matters but when I upload a sketch via ArduinoIDE and even though the sketch uploaded doesn't work, the Esp continues to broadcast the WiFi signal. I thought that if I upload anything via Arduino then the uploaded sketch will act as firmware and Esp should not work in AP mode after that ? Sorry for such 'peasant' reasoning but I am describing as much as I can.

khoam · Answer

Try uploading the AT firmware again, but with the DOUT option instead of QIO (settings in the SPI MODE section). . It will, as long as you don't change the mode and network name from within the program.

88xtc · Answer

. AT uploaded with DOUT option, on 115200kb AT+GMR responds Error, on 9600 silence, on 74880 bushes. Strange that after a reset it doesn't state what mode the SPI is in: .

khoam · Answer

I would still try with the DIO option. If it doesn't work, that might indicate some kind of flash memory problem with these chips. Are these ESP-01 S ?

88xtc · Answer

DIO didn't change anything either, it returns ERROR after issuing any command, on 74880 after a reset it returns the information correctly. The ones I am trying to flash are 'ordinary' ESP01s. Today 4pcs of esp01 have arrived including one esp01S and a Nodemcu V3 through which I will also try to upload something on esp01. If the situation repeats itself, then it's either an adapters fault or something with the ports ? I will report back from the battlefield on Wednesday. Thanks a lot for the support so far !

Slawek K. · Answer

Is GPIO0 shorted to GND during programming and disconnected from GND during normal operation ? The question may be trivial but it is worth being sure . Greetings

88xtc · Answer

. . From what I read the esp01 on the blue pcb had 512kB. I can't take a better photo with what camera I have. . I inserted and it works, every AT command. I have wasted several days looking for a problem where there is none, leaving me with 7pcs of esp01 to use . . Works even on upload without external power supply . Yes, GPIO0 returns to VCC A big thank you to you Fellows for your support and knowledge sharing, which I will probably still use when 'wrestling' with these modules.

88xtc · Answer

No CR LF characters inserted at the end of commands

[Solved] ESP01: Difficulty uploading ESP8266_AT_Bin_V1.6.2_0 firmware via Flash Download Tools v3.8.5

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