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--- network_protocol_programming_lab:fh_sender [2020/06/11 09:21] – rathke
+++ network_protocol_programming_lab:fh_sender [2021/04/19 12:46] (current) – [Requirements] rathke
@@ Line 1: / Line 1: @@
 ====== Exercise: Finalizing the FH system by implementing the sender ======
-The last step will be to develop the sender of the "Frequency Hopping"-system.
+The last step will be to develop the sender of the "Frequency Hopping (FH)"-system. The sender is based on the Exercise [[network_protocol_programming_lab:15.3_4_exercise|4. Exercise: Packet Transmission]]. In addition to this exercise, the following extensions are needed:
+  * the baud rate need to be reduced to 1.2 kBaude,
+  * the preamble should be set to 1 Byte,
+  * the frequency must be changeable and the sender should use the same frequencies as the receiver see [[network_protocol_programming_lab:fast_scan|Exercise: Scanning faster]] and
+  * the sender changes the frequency after transmission of a packet.
+===== Requirements  =====
+This task requires
+  * Two ready BeagleBone Black equipped with the CC1200 operating at a symbol rate of 1.2 kBaude and a preamble length of 1 Byte.
+  * no 4C
+===== Tasks  =====
+  * the programming is done by extending the source files of exercise [[network_protocol_programming_lab:15.3_4_exercise|4. Exercise: Packet Transmission]].
+  * Test, if pre-calibration compared to normal calibration improves the stability of the system.
+===== Hints  =====
+  * For simplicity, the sender changes the frequency in round robin manner.
+  * Sender and receiver should use tree frequencies.