UART driver buffer sizes

We are developing a software for digi connectem/connectwiem boards. On these boards we are using a serial port 0 for other device interface where in the other device sends the data. UART driver is used for serial port 0. The os version we are using is NTT+OS 6.0. The problem we are facing is when the other device send data more than 32 bytes, the connectem/wiem board receives only 32 bytes and discards the other bytes. Is there a buffer restriction of 32 bytes in serial driver. Is is possible to set the buffer sizes. Please respond back to our question as this is very critical for our project.


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