Do I need a PID to LOG serial data?

[Chalky]

Using SM-AFr and just wired up a MAX3232 ic. Can't figure out how to get SM-AFR to retrieve signal.

[Blacky]

I presume that is a PLX device?
Make sure to select PLX in the FlashScan setup menu. Or when displaying AFR data on FlashScan's LCD screen, use Ctrl+Backspace to scroll through the supported wide band controllers.

You need to be using the V2.05.17(0512) firmware that ships with the EFILive V7.5.4 BBL Beta software, here:
http://forum.efilive.com/showthread.php?t=8033

Then use the PIDs:

EXT.WO2ST1 F408 SED-16-900 . External "External Wideband Sensor State"
EXT.WO2ST2 F409 SED-16-900 . External "External Wideband Sensor State"
EXT.WO2LAM1 F40A UNM-16-913 "lambda" External "External Wideband Lambda"
EXT.WO2LAM2 F40B UNM-16-913 "lambda" External "External Wideband Lambda"
EXT.WO2AFR1 F40C UNM-16-914 "AFR" External "External Wideband AFR"
EXT.WO2AFR2 F40D UNM-16-914 "AFR" External "External Wideband AFR"
Regards
Paul