Hi all, I need some help understanding how to use a standar B4J class in an ABMaterial project, basically I have a project where I have a written a class that opens a Serial Port and starts receiving data from a device, This all works perfect so far, until I navigate to a different page, the...
Hi guys! Im thinking an app which I will call CompositeUSB. I finaly found my old OTG supporting android tablet (API 17 4.2.2)
When I was using ESP32. I got an idea by using android tablet as tft.
It will command like this
But I cant find any Examples to do put...
I am working with a device which sends data via cable.
How can I do it with B4i? Whats the serial lib?
Dim AStream As AsyncStreams
Private com As Serial
Hi, im using a ESP32 Bluetooth to send a number.
i use bluetooth serial in esp32 arduino to send number.
I can received this number in serial bluetooth terminal app in my phone.
I need just receive and show this number in android phone.
Time between send number is minimum 2 seconds but its...
I have the following situation. I'm sending some data over usb serial and I have to wait for an answer from the other party (a hardware device) before sending data again.
I want to use Wait For with AsyncStream, but there are situations when the other party does not answer at...
use B4A --> to send commands to Attiny
how can i send textcommands like "r" or Data like "50" as ascii char ?
i tried some with byteconverter and StringtoHex.... but nothing is successfull...
Have anybody idea how i can send Textcommands ?...
Tengo una aplicación desarrollada en B4A de un sistema de autoventa con impresión de albaranes que funcionaba desde hace años, pero a raíz de instalar la versión 9.8 me ha dejado de imprimir vía bluetooth en ciertos dispositivos antiguos, en otros sigue imprimiendo bien, y en otros...
I"m in the middle of project using android tablet to control a microchip, that in his turn control a machine.
just sending serial command like- "openWaterPump", "closeWaterPump" ans so on.
I did all my checking using ardoino, and it worked great. now we move to production level and we...
Hello everyone, i have written an app which searches for a certain device UID, I have a B4A app running on a device which is running Android 8.0 which basically just listens when the B4J app tries to connect, I followed @Erel 's tutorial here, My question is this, everything seems to work only...
Since some months our app aborts printing via bluetooth on a DPP-250 printer in the middle of the text.
I wrote a minimal app to test this (see attached zip). The jpg shows some tests: The first works, the next two abort, the next works, the last aborts.
I'm using B4A 8.50 with Serial 1.26...
How can I send AT command to AT-09 (HM-10 clone) BLE module ?
The Arduino code is :
SoftwareSerial mySerial(2, 3);
Hi everyone , i have a a program that connect with a scales weight, i have no problem doing the conexion, the problem is when the scale is off, but conected , the serial recognize the port but when i try to connect with it and send the comand to obtain the weight i have to posible respons: