FMM230 battery voltage

Hi, how can i ask battery voltage by sms to my phone. I mean vehicles battery where fmm230 has connected, by + pin1 and - pin7, not internal battery.
Thanks Juhani

I hope you are having a good day.

If you wish to get the external voltage value from the device via SMS, simply send this command:
(login)(password) readio 66
if you do not have login and password set, simply put two spaces before the commmand

Keep in mind that external voltage I/O needs to enabled in the i/o section:

Best regards,
Gustas Daugirda