Transmit text via wifi from mobile to ESP32

Projects Networking, Protocols, and Devices
1

Good morning everyone,
I need to remotely transmit some text to be written on the mobile phone (away from the ESP32 network) to an ESP32 using wifi to print it on an LCD monitor or on a led matrix.
I honestly wouldn't know where to start. Can anyone give me some help or examples to draw on and then modify them according to my needs?
Thanks in advance.

2

how remotly do you wish to connect? from 10metres, 100kmetres?
is the ESP32 in range of a local WiFi network which it could connect too and hence to the internet?
have a look at esp32-web-server-sent-events-sse

3

Km km km
I need to write a text from iphone even on the other side of the world on ESP32.

4

Put the ESP32 on Blynk (BlynkIOT) and access it via the Blynk IOT 'app'.

5

run the ESP32 in station mode connect it to the local WiFi using SSID and password
give the ESP32 a static IP address and set your internet router up to port forward packets for the ESP32 application, e.g. port 80 for a web sever on the ESP32

6

Please, tell something on the operation/use of WiFi Serial Terminal of the Mobile Phone in respect of its use to send the "Hello" message to the ESP32 for onward printing on its LCD.

7

I give a simple example.
I have tennis courts to manage for the games. Through the video surveillance I see that the tennis courts are not usable due to a storm.
From home or anywhere in the world, I want to warn tennis players that accessibility to tennis courts is not permitted.
How to do?
I write the text with a browser on the computer or mobile phone to be sent to the ESP32 (in the Club house) which is connected to a led matrix panel to warn the players.

I gave the example of using an LCD display, but in reality I will use a led matrix panel because I have already made other projects with the ESP32.

I wouldn't use Blynk or similar.

  • horace - told me: run the ESP32 in station mode connect it to the local WiFi using SSID and password... etc.
    Ok... but in practice I don't know how to continue.

I'm not very expert in this field and I need a base to be able to modify it according to my needs.
Better yet, if there is something similar on the net, let me know.

Thank you for helping me on other occasions already.

8

have a look at esp32-esp8266-input-data-html-form
it

  1. connects to a local WiFi network using SSID and password
  2. runs a WebServer which when a client connects displays a form
  3. a remote user can connect to the web page and enter data on the form, e.g. for display on your LCD
9

Ask ChatGPT with following message:
How to use WiFi Serial Terminal in Mobile phone

This is the answer which you may follow:
To use a WiFi serial terminal on a mobile phone, you typically need to follow these steps:

1. Install a WiFi serial terminal app: Search for and download a WiFi serial terminal app from your mobile phone's app store. There are several available options, such as "Serial USB Terminal" or "WiFi Terminal."

2. Connect to the WiFi network: Make sure your mobile phone is connected to the same WiFi network as the device you want to communicate with. Both the phone and the device should be connected to the same local network.

3. Launch the WiFi serial terminal app: Open the WiFi serial terminal app on your mobile phone.

4. Configure connection settings: In the app's settings, you will typically find options to configure the connection parameters. This includes selecting the appropriate baud rate, data bits, stop bits, and parity settings. You may also need to specify the IP address or hostname of the device you want to communicate with.

5. Connect to the device: Once you have configured the connection settings, use the app's interface to establish a connection with the target device. This may involve tapping a "Connect" button or selecting the appropriate connection option.

6. Communicate with the device: After establishing a connection, you should be able to send and receive data to and from the device through the WiFi serial terminal app. The app usually provides a text input field where you can type commands or messages to send, and a display area to view the received data from the device.

10

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