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altera2015 / usbserial

Flutter Android USB Serial plugin
BSD 3-Clause "New" or "Revised" License
125 stars 84 forks source link

Not receiving data to a non-esp32 device #74

Closed pieterbergmans closed 1 year ago

pieterbergmans commented 1 year ago

Hi...I'm successfully using usbserial to communicate back and forth between my Android/Flutter app and an M5Stack Fire, which is an esp32-based microcontroller. However, when I connect my Android/Flutter app to my non esp32-based device, I can connect to the device and I can also send data but I can't receive any data to my Android/Flutter app. I've verified that my non esp32-based device is sending data; I've connected it to my PC and I'm receiving data to a python script. My Flutter code follows the example code provided by usbserial.

I don't know much about USB/serial communication and I'm having a really hard time diagnosing this. Does anyone have any suggestions to diagnose/solve my issue? This may not even be an issue between an esp32-based device vs a non esp32-based device but I don't have any other devices lying around to further articulate the issue.

For what it's worth, these are the USB specs for my non esp32-based device. But, like I said, I don't know much about USB so I don't know if hardware can even ben an issue or not.

1 x dedicated MMC 4.5/SD 3.0/SDIO Port (1-/2-4-bit), 2 x USB 2.0 OTG with PHY, 3x I2S/SAI, 1 x S/PDIF Tx/Rx, 2 x FlexCAN (2.0b), 4 x I2C, 4 x SPI, 7 x UART, 4 x Timer, 8 x PWM, 3 x Watchdog, 2 x 12-bit ADC (10 channels) with 4-wire/5-wire touch controller, up to 103 GPIOs

Any help would be greatly appreciated.

altera2015 commented 1 year ago

So many things could be wrong here, but not likely the library in this case.