[Hilo] Is there any flow control supported on USB? What’s the modem buffer for Hilo3G USB and UART?
Answer: There is no flow control on USB. Flow control is only available on UART.
We suggest you to use UART to transfer data with flow control, UART can support up to 4Mbps. This covers the maximum data-rate of HSDPA network (3.6Mbps).
Below is the information about the modem’s buffer.
USB Rx buffer: 1152 bytes
USB Tx buffer: 1040 bytes
UART Rx buffer: 2048 bytes
UART TX buffer: 2048 bytes