Hi,
Circumstance:
A 20 Byte data(including block 1, block 2 and CRC length) needs to be transmitted in accordance with the EN-13757-4 T1 mode. The MCU is CC430F6137. RF registry settings can be adjusted right. We can provide communication between two CC430 set, yet we confronted with some problems when we tried to communicate with Radiocraft. The data transmission from Radiocraft to CC430 is OK but from CC430 to Radiocraft is problematic.
The problem is defined with the following example;
The following data that is created by CC430 is not accepted by Radiocraft.
0F 44 AE 0C 78 56 34 12 01 07 1.block
78 0B 13 43 65 87 2.block
with crc 0F 44 AE 0C 78 56 34 12 01 07 44 47 78 0B 13 43 65 87 1E 6D
However, the transmission is observed by RF signal spectrum and the data arrives to the module. We are waiting for your suggestions.
And please respond to the following questions;
- How can we send the preamble and the sync word ( in the documents, we saw a statement that says they are sent automatically by packet handling in RF core.). We can adjust the parameters(frequency, deviation, etc…), yet the preamble and the sync word is different in S mode and T mode. How can we make this selection or how can we send these(preamble and sync word) manually.
- – Check carrier sense
– Check for valid preamble
– Check for valid sync word
– Check length byte
– Check for valid address
The device is not accepting the above listed data, as I mentioned before we need to achieve this transmission. What is the valid address value according to EN-13757-4 T1.
3. What could be another possible reason for that a meter to master reader device discards the data.
