ESP8266 Community Forum

- Thu May 10, 2018 6:09 pm #75866 Hello,

I'd like to have some sort of communication bridge between two ESP8266 module just like in classic BL and I got lost with all the internet terms of Client, HTTP client, access point, server,station, ect.

So I'd like to ask what is the best solution for such a request(it'd be best not to even be able to see any of the modules in wifi scanning(for example with the smartphone) ) and have as real time communication as possible for very low datarate.

It'd be very useful to also have an example attached for arduino sins I'm realy just getting started.
Would also like to utilize the UART and GPIO of each module.

Thanks for helping.

- Thu May 10, 2018 11:00 pm #75872 Start here - https://arduino-esp8266.readthedocs.io/ ... eadme.html

Then try this example
https://arduino-esp8266.readthedocs.io/ ... mples.html

Use your PC on your network to talk to the ESP8266 with the Packet Sender program. Get familiar with it. Then you can add a second ESP and talk to it.

After all that you can set up one ESP8266 to create it's own Access Point and the second ESP programmed as a Station can connect to it. No need for joining an existing connection. Al this is one way to accomplish what you ask. There are others.

Because it is WiFi the SSID will still be visible but is that really a problem? Have a password so that nobody else can join.

Or the ESP8266 can use a mode different than WiFi, called ESP-Now. https://www.espressif.com/en/products/s ... w/overview

I never tried it. I believe it is more like Bluetooth.

- Fri May 11, 2018 12:10 pm #75885 Well thanks,

But when I try to program the Wemos D1 mini pro it won't let me but it blinks a few times and then prints that error in the console :

Code: Select allesptool v0.4.13 - (c) 2014 Ch. Klippel <ck@atelier-klippel.de>
   setting board to nodemcu
   setting baudrate from 115200 to 921600
   setting port from COM1 to COM9
An error occurred while uploading the sketch
   setting address from 0x00000000 to 0x00000000
   espcomm_upload_file
   espcomm_upload_mem
   setting serial port timeouts to 1000 ms
opening bootloader
resetting board
trying to connect
   flush start
   setting serial port timeouts to 1 ms
   setting serial port timeouts to 1000 ms
   flush complete
   espcomm_send_command: sending command header
   espcomm_send_command: sending command payload
   read 0, requested 1
trying to connect
   flush start
   setting serial port timeouts to 1 ms
   setting serial port timeouts to 1000 ms
   flush complete
   espcomm_send_command: sending command header
   espcomm_send_command: sending command payload
   espcomm_send_command: receiving 2 bytes of data
   espcomm_send_command: receiving 2 bytes of data
   espcomm_send_command: receiving 2 bytes of data
   espcomm_send_command: receiving 2 bytes of data
   espcomm_send_command: receiving 2 bytes of data
   espcomm_send_command: receiving 2 bytes of data
   espcomm_send_command: receiving 2 bytes of data
   espcomm_send_command: receiving 2 bytes of data
Uploading 250464 bytes from C:\Users\Mike\AppData\Local\Temp\arduino_build_445861/Blink.ino.bin to flash at 0x00000000
   erasing flash
   size: 03d260 address: 000000
   first_sector_index: 0
   total_sector_count: 62
   head_sector_count: 16
   adjusted_sector_count: 46
   erase_size: 02e000
   espcomm_send_command: sending command header
   espcomm_send_command: sending command payload
   setting serial port timeouts to 15000 ms
   read 0, requested 1
   setting serial port timeouts to 1000 ms
warning: espcomm_send_command: didn't receive command response
warning: espcomm_send_command(FLASH_DOWNLOAD_BEGIN) failed
closing bootloader
   flush start
   setting serial port timeouts to 1 ms
   setting serial port timeouts to 1000 ms
   flush complete
error: espcomm_upload_mem failed

Any idea why?

- Fri May 11, 2018 12:26 pm #75886

Start here - https://arduino-esp8266.readthedocs.io/ ... eadme.html

Then try this example
https://arduino-esp8266.readthedocs.io/ ... mples.html

Use your PC on your network to talk to the ESP8266 with the Packet Sender program. Get familiar with it. Then you can add a second ESP and talk to it.

After all that you can set up one ESP8266 to create it's own Access Point and the second ESP programmed as a Station can connect to it. No need for joining an existing connection. Al this is one way to accomplish what you ask. There are others.

Because it is WiFi the SSID will still be visible but is that really a problem? Have a password so that nobody else can join.

Or the ESP8266 can use a mode different than WiFi, called ESP-Now. https://www.espressif.com/en/products/s ... w/overview

I never tried it. I believe it is more like Bluetooth.

Well thanks,

But when I try to program the Wemos D1 mini pro it won't let me but it blinks a few times and then prints that error in the console :

Code: Select allesptool v0.4.13 - (c) 2014 Ch. Klippel <ck@atelier-klippel.de>
   setting board to nodemcu
   setting baudrate from 115200 to 921600
   setting port from COM1 to COM9
An error occurred while uploading the sketch
   setting address from 0x00000000 to 0x00000000
   espcomm_upload_file
   espcomm_upload_mem
   setting serial port timeouts to 1000 ms
opening bootloader
resetting board
trying to connect
   flush start
   setting serial port timeouts to 1 ms
   setting serial port timeouts to 1000 ms
   flush complete
   espcomm_send_command: sending command header
   espcomm_send_command: sending command payload
   read 0, requested 1
trying to connect
   flush start
   setting serial port timeouts to 1 ms
   setting serial port timeouts to 1000 ms
   flush complete
   espcomm_send_command: sending command header
   espcomm_send_command: sending command payload
   espcomm_send_command: receiving 2 bytes of data
   espcomm_send_command: receiving 2 bytes of data
   espcomm_send_command: receiving 2 bytes of data
   espcomm_send_command: receiving 2 bytes of data
   espcomm_send_command: receiving 2 bytes of data
   espcomm_send_command: receiving 2 bytes of data
   espcomm_send_command: receiving 2 bytes of data
   espcomm_send_command: receiving 2 bytes of data
Uploading 250464 bytes from C:\Users\Mike\AppData\Local\Temp\arduino_build_445861/Blink.ino.bin to flash at 0x00000000
   erasing flash
   size: 03d260 address: 000000
   first_sector_index: 0
   total_sector_count: 62
   head_sector_count: 16
   adjusted_sector_count: 46
   erase_size: 02e000
   espcomm_send_command: sending command header
   espcomm_send_command: sending command payload
   setting serial port timeouts to 15000 ms
   read 0, requested 1
   setting serial port timeouts to 1000 ms
warning: espcomm_send_command: didn't receive command response
warning: espcomm_send_command(FLASH_DOWNLOAD_BEGIN) failed
closing bootloader
   flush start
   setting serial port timeouts to 1 ms
   setting serial port timeouts to 1000 ms
   flush complete
error: espcomm_upload_mem failed

Any idea why?