System diagram about our Sonoko project; see the router (rb532) needs 4 serial lines, one of them is reserved for the onboard GPS, which is soldered to the miniPCI card.
So to understand it correctly you do have the PCI card in a PC and then it turns up as 3 com port in the control-panel?
We are using a router, with a miniPCI multi uart cards.
- /dev/ttyS0 is the router-built-in serial (it's the router's console, cannot be used)
- /dev/ttyS1 is reserved for the miniPCI-built-in GPS
- /dev/ttyS2 is reserved for talking with node0
- /dev/ttyS3 is reserved for talking with node1
- /dev/ttyS3 is reserved for talking with an engine that controls a display, an RFID reader and other stuff (not currently shown in the system diagram, still under development)
When you try to send data to the SiRF III module and described in the SiRF pdf I linked to do you get any response?
Precisely. No response. Probably the command it's not supported, in fact, the pdf says "you can enable ZDA only if PPS is supported", and in our case ... there is no "PPS" signal.
Can you change simple things like the rate where that data are sent or other things?
yes, we are using 1200bps instead of 4800bps: this was changed by issuing a command on the serial line, and the GPS accepted it.
I would expect all SiFR III chipset to respond likely but I can be wrong
changing the baud rate was silent, without any feedback on the serial line: it just started talking at 1200bps.