embedded - Getting Epson receipt printer to print from Arduino

I'm trying to build a microprinter using an Arduino and an Epson TM-T88II receipt/POS printer. The printer uses the Epson Esc/POS system, but I can't get it to do anything at all from the Arduino. I'm…


accelerometer - How to determine absolute orientation

I have a xyz accelerometer and magnetometer. Now I want to determine the orientation of the device using both. The problem I see is that depending on the device orientation, I'd need to use the sensor…


python - unzipping file results in “BadZipFile: File is not a zip file”

I have two zip files, both of them open well with Windows Explorer and 7-zip. However when i open them with Python's zipfile module[zipfile.ZipFile("filex.zip")], one of them gets opened but the o…


iOS BLE Bluetooth-send/receive HEX data

I am creating an iOS application that should connect to a custom BLE device. I need to iOS app to send 2 HEX commands, one to enable a part of the device and another to request for Data. Is there an…





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