The CRC check is done internally inside the module, and you will for this reason not see the CRC un the UART message.
Last Update: January 18, 2018
January 18, 2018 1507 Wireless M-Bus Q&A
Related Knowledge Base Posts -
- [W-MBUS] “I configured the MBUS radio to use the UART flow control using the CTS/RTS pins. When the host processor wants to send an MBUS message, it pulls the RTS pin low and waits for the radio to pull CTS up. The processor then sends the message. But this gives strange results, and sometimes it just fails to send the message. I also tried using only the CTS pin, where I wait for the pin to go high before sending the message. Again, this does not always work. Are the CTS/RTS pins exclusively for controlling the flow over the uart connection (host processor to radio) or are they meant to indicate when the radio can send another message ? If so, how should I use them ? “
- [W-MBUS] would it be possible for us to know what modulation technique does rc1180-MBUS use?
- [W-MBUS] As far as the data format is concerned, the “”MBUS-CCT user manual”” states: “”To send ASCII characters, type them in and hit the enter key or click on the send once button””. In case bytes have to be sent, we know that te first byte should be the Length byte. We tried to transmit the same bytes sequence shown as an example in the user manual (pag. 4): ‘5 0x33 0x25 6 78 7’. In both cases (ASCII and bytes transmission) nothing is transmitted across the link (or at least nothing appears at the receiver side). Comments?