TS-7840 Iridium modem
From embeddedTS Manuals
The TS-7840 supports Iridium modems on CN8. This supports the Iridium Antenna on the external "IRD" SMA connector. The optional Iridium GPS antenna is not connected. For GPS support we recommend using the TS-7840's built in #GPS.
# Turn on power to the modem
gpioset 3 19=1
# Release the modem reset
gpioset 2 23=1
# Poll for modem to be on the network
gpioget 2 22
# 0 = not ready
The Iridium modem usage is covered by the Iridium datasheet, but the modem can be tested with picocom:
picocom -b 19200 /dev/ttyS5
Type "AT" and press enter, and it should respond with "OK".
| Pin | Description |
|---|---|
| 1 | 5V |
| 2 | 5V |
| 3 | GND |
| 4 | GND |
| 5 | IRD_MODEM_ON GPIO Bank 2 IO 23 |
| 6 | /dev/ttyS5 TXD |
| 7 | /dev/ttyS5 RXD |
| 8 | GND |
| 9 | /dev/ttyS5 DCD |
| 10 | /dev/ttyS5 DSR |
| 11 | /dev/ttyS5 CTS |
| 12 | /dev/ttyS5 RI |
| 13 | /dev/ttyS5 RTS |
| 14 | /dev/ttyS5 DTR |
| 15 | GND |
| 16 | NC |
| 17 | NC |
| 18 | GND |
| 19 | IRD_NETWORK_RDY GPIO Bank 2 IO 22 |
| 20 | Modem 3.3V |