Serial OTG. Arduino CH340. FTDI. rkl099's Extension

no it doesn't. before this i'm using the built in serial blocks. the only reason i'm switching is because the built in blocks doesn't have the block to check whether there is 'byte to read' before actually 'reading the data', causing me to get null or weird characters as explained in this topic,

therefore, i'm switching to your extension and it works excellently (i could also remove some blocks to deal with the "\n" that i get from using the built in serial component to read) but only this small weird .Open issue cause problem. I could actually deal with it by using if then blocks like so but I think if it can be fixed, the extra blocks just not necessarily needed.
ai2 ss

OK, I will put it on the to do list.

Dear you!
How much I dug through to at least light the Arduino bulb! Thank you!
Please send me a link to the latest release of the extension!

The latest version of SerialOTG extension:
Release 1.5, GitHub - rkl099/Appinventor-SerialOTG: Appinventor extension SerialOTG with BT/WIFI client/server support, examples of apps and Arduino code, ver 1.5
1.5.1 adds improved FTDI write speed, GitHub - rkl099/Appinventor_Debug: Debug versions: SerialOTG, Modbus and test programs (Note: can be changed any time). Updated to 1.5.1