Product Info

• Trip start and stop

Anyhardwareorsoftwareresetwillreturnthedevicetofullpowermode.

3.4 AT Commands

Extended AT commands are specific to the PN-G device. They are closely based on

commands that are as similar as possible industry common devices and are essentially

subsets of standard PN-G commands. Native AT commands supported by the

Mediatek

2503 chipset

are also available via the serial and USB interfaces.

3.5 Ack’ed Mode

UDPisnota100%reliableconnectionandoccasionalreports orcommand/responsesmaybe

lost.Sinceallcommandshaveresponses,theservercanrepeatanycommandto whichthereis

noresponse.Inordertoassurereliablereceptionofreports,PN-Gdevicescanbeconfigured

eitherinNormalorAck’edmodetosendthereports.IntheNormalmodethereportsaresimply

sent“asis” withnoacknowledgmentfromtheserver.IntheAck’edmodeeveryreportsentis

expectedtobeacknowledged bytheserverbysendingbackanACKmessageback.If

acknowledgement

isnotreceivedwithinthespecifiedtimeout,thereportisre-sent.Ifthereport

isnotacknowledgedafterthespecifiednumberofattempts,itisqueued.Ifacknowledgement

isreceivedafterthereportisqueued(i.e.pasttimeoutofthelastattempt),itisignored.

Report is not considered “complete” until its acknowledgement is received. Thus, if

report X is sent and report X+1 is triggered while waiting for acknowledgement of X,

report X+1 will be queued until such acknowledgement is received and only then sent.

The PN-G will attempt to re-send queued report(s) every time a new report is triggered.

If there is more than one report queued, the reports will attempt to be sent in the order

of triggering and only once the report is acknowledged, the next report is attempted.

This assures that reports are sent and received in order

Ack’edmodeassuresthatallreports arereceived,butaddsoverheadintimeanddata.Report

thatisnot

acknowledged

issentagainand

eventually

willbequeuedandsentagain.Thenumber

andfrequencyofre-triesisconfigurableviatheReportAcknowledgement command.

3.6 Event Report Format

Reportsareencoded as binaryhex.It is also echoed to the debug UART in ASCII

format.

3.7Reset

Thereareanumberofresetsavailableonthedevice.Softresetonlyrestartsthesoftware

runningonthedevice.Hardresetiscausedbyresettingthewholebasband moduleviaareset

pin.ThereisalsoanoptiontoresettheGPSand the cellular sub-systemsindividually.