A single RS-232 port on UART0 of the module is for developer testing and for module firmware programming. The UART0 interface has a standard 9-pin D-type connector and accepts RS-232 voltage levels. Table 6 provides RS-232 connector pinouts.
Table 6. RS-232 port pinouts
| Pin | Signal |
|---|---|
| 1 | Tied to pins 4 and 6 |
| 2 | Transmit Data Output (TX) |
| 3 | Receive Data Input (RX) |
| 4 | Tied to pins 1 and 6 |
| 5 | Ground |
| 6 | Tied to pins 1 and 4 |
| 7 | Clear to Send (CTS) |
| 8 | Request to Send (RTS) |
| 9 | Not Connected |
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By default, Sedona debug console output is directed to this port, using the following serial parameters:
Baud rate: 115200
Data bits: 8
Parity: None
Stop bits: 1
Flow control: None
During testing and development, you typically use the provided straight-through DB9M to DB9F cable to connect this RS-232
port to your engineering PC, along with a terminal emulation program to monitor this debug level messaging. See SED-M0x module console.
The RS-232 port on the Sedona dev board can also be used for programming the module, using the “flasher” type selection for a PC port from the “Jennic Serial Port Tool” in the Sedona Workbench. Again, a pushbutton switch combination is required. See Table 3.
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