5.4 Communications
A Serial Debug Header is included in the sample hardware design to upgrade the Modem
firmware. It is critical that users include this, or similar, header in their design to provide serial
access to the Modem, which can be used to upgrade to future firmware versions and for
debugging.
The Serial Debug Header requires the following connections: SERIAL_RX, SERIAL_TX, and
GND. It is highly recommended that the designer use a 6-pin connector to easily
accommodate a COTS TTL (USB-A to UART) cable or Tag-Connect, for example:
Figure 6: Example of a Serial Debug Header, shown on the Swarm Eval Board
November 2021 Swarm M138 Modem Manual - Rev 1.00 23/77
To Next Page
Loading...