UART SERIAL BUFFER CLEAR / FLUSH(). There is no direct function to clear UART buffer in Mbed, Trick require to handle this situation. Simple way is mentioned in this program to clear Rx buffer of UART. Jaydeep shah - radhey04ec@gmail.com

Revision:
0:3355c5b6d8fd
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/mbed-os.lib	Fri Jul 24 10:37:58 2020 +0000
@@ -0,0 +1,1 @@
+https://github.com/ARMmbed/mbed-os/#cf4f12a123c05fcae83fc56d76442015cb8a39e9