B4R Question connect iPhone and Android with Wemos

[Deleted member 103]

Hi,

I can connect to my Wemos-board with Android (Wemos is the server). For the connection I use the Library "WiFiConnect".
Now I want to simultaneously build a connection with an iPhone. How does it work? Is there a library / function for this?

Thank you in advance

 

[Erel]

I'm not familiar with WiFiConnect library. You should use Network and iNetwork libraries with AsyncStreams for a low level TCP or UDP communication.

Simple solution based on UDP broadcasting: https://www.b4x.com/android/forum/threads/esp8266-udp-bmp180-simple-weather-station.70243/#content

For a more complex communication requirements then I would have used MQTT. It means that you need to run a broker on an Android, PC or RPi. But it will make everything simple.

 

[Deleted member 103]

Hi Erel,

Simple solution based on UDP broadcasting: https://www.b4x.com/android/forum/threads/esp8266-udp-bmp180-simple-weather-station.70243/#content

a question: how quickly is running the transfer? I must quickly transfer individual bytes, almost in realtime.

 

[Erel]

UDP broadcasting to multiple devices can be slow. If you send directly to a single device then it will be very fast. MQTT will also be fast.

 

[Deleted member 103]

Thank Erel.
I need to simultaneously transmit at least two devices.

 

[Erel]

Go with MQTT.

 

[Deleted member 103]

Go with MQTT.

I'm sorry Erel, but I do not understand how to use MQTT to send the data from WeMos to Android and iOS without having a server.
Your example uses a B4j server, for my solution I can not use a B4j server and no Internet.
I start my WeMos as Wifi.StartAccessPoint2 ( "myWifi", "passwd").
Android and iOS connect with the WeMos and everyone gets a new IP address.
Until everything is clear, how do I send from now with MQTT the data to the 2 devices?

 

[Erel]

MQTT does require a broker. You need to run it somewhere. It can be on a desktop computer, Raspberry Pi or an Android device.

If it is not possible then you can use UDP: https://www.b4x.com/android/forum/threads/70243/#content

 

[Deleted member 103]

Thank you Erel!
I love MQTT, it is so simple, I think now on the right way.

 

[Deleted member 103]

Unfortunately, the data on the connected devices does not come exactly at the same time.
From device to device, 2 to 4 hundredths of a second are different.