Send file data demo.

Dependencies:   modem_ref_helper CRC DebouncedInterrupt

Revision:
20:5856f9bfd8e3
--- /dev/null	Thu Jan 01 00:00:00 1970 +0000
+++ b/CRC.lib	Fri Oct 29 13:11:38 2021 +0000
@@ -0,0 +1,1 @@
+https://os.mbed.com/teams/WizziLab/code/CRC/#88116ae677af