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The IDE stops working after the following. It happens in both release and debug mode. 10079 USB_Silver_5 Oscar Peterson Night Train 05-Moten Swing.wav 10080 USB_Silver_5 Oscar Peterson Night Train 06-Easy Does It.wav 10081 USB_Silver_5 Oscar Peterson Night Train

For USB connection... The S in USB is Serial. Therefore you are dealing with "Serial" connection or AsyncStreams. Make sure you pass the correct printer name added in the OS, as printerGen in printString method.
link: First you said it works fine. Then you asked, Question 1, how to set the font size. Question 2, can't make connection with USB but you said it work
link: It works fine using the code I found in the forum posted above. However, the code above doesn't include the font size feature, unlike the code in agra
link: https://www.b4x.-usbserial-for-b4j.86572/post-548270 Hello everyone, I found this sample code in the forum, and it works fine. However, this code doe

Post your B4J code and device serial spec parameters may help. jSerial works greatly at my side for other usb-serial chips.
link: I have a hardware development with a CP2104 USB-Serial chip. With B4A App I am able to interface with this chip easily, and read from it a stream of d
link: You have it here: https://www.b4x.-library.34762/ I just used the project in the file B4J_Chat.zip Thanks!

Yes, solved ! Unstable work was due to at COM-port losing or adding - i was reconnecting all the ports. If to manage ports only one by one - no any trouble: each COM-port is able to work at any detected baudrate and together with others already working ports. Resume: do not break already working OK
link: Yes. Each is created in the class dynamically. Root usb_devices class detects COM-ports list, and creates instances of the use_serial_device class whe

It's simple Windows-UI program which brings the OS to flash with it. No need to search for os-images or to load 6 files which is very annoying. You can see the soldering needed on cheaper devices. Buying the USB one is totally worth it. Plug & Play. You will only need to connect a simple USB cable
link: "OK"; break; Case "GetMessages": $q = mysqli_query($con,"SELECT * FROM mess where mtype = '1' order by ts desc") or die(mysqli_error(
link: B4J UDP Client Attached - used Client1 for receiving data from the NodeMCU. Thanks again for triggering this topic.

ANNOUNCEMENT I have completed the tests for USB printing and it seems to work. So we would have available as well as Bluetooth SPP also the USB connection (for printers installed with their own driver)
link: This library has been replaced by jSD_EscPosPrinter which also supports USB connection https://www.b4x..162668/

Update rel 1.02 Added GetUSB returns the list of installed usb devices Added GetCOM returns the list of serial port Added GetIdleTime returns the user's idle time
link: Update rel 1.01 Add Monitor (On As Boolean) rel. 1.02 Added GetUSB returns the list of installed usb devices Added GetCOM returns the list of seri

This library allows you to print text and image to a bluetooth thermal printers Works with Bluetooth and USB. For USB thermal printers you need the driver Dependence: jBluetooth This version requires an activation code. If you do not have a code then it will work in DEMO mode and you will only be a
link: Here you will find examples for the Bluetooth and USB version 156258 156259

Measuring analogue signal on PC without the need to program a microcontroller. The MCP3201 is a 12 bit ADC, the USB to Serial module drives the ADC by bit banging the Hardware Controls (Flow Controls). The USB to Serial converter has to have DTR, CTS, and RTS, I used this one from Ebay: https://www.

SXbmhKz0sa4 This is a demo video of B4J Print Server which is a REST API Web Server. The server can run on Windows and Linux including on a Raspberry Pi OS. I have also created B4J, B4A and B4i Client app to send request to the server through GET and POST. The print data can contain ESC/POS string

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